INTENSITAS HUJAN RENCANA METODE LOG PEARSON TYPEIII MENGHITUNG DEBIT PUNCAK DENGAN METODE NAKAYASU •

Tabel 4.22 Input Unit Hidrograf sub DAS Sei Percut No Parameter Unit Higrograf 1 Panjang sungaisaluran L L = 70,00 km 2 Luas DAS F DAS = 514,00 km 2 3 Koef. Pengaliran DAS Cw DAS = 0,599 3 Time tag Tg Tg = 4,460 jam Syarat : L 15 km; Tg = 0,4 +0,058L L 15 km; Tg = 0,21L 0,7 4 Satuan waktu hujan tr Tr = 3,345 jam Syarat : Tr = 0,5 tg s.d 1,0 tg 5 Peak time Tp Tp = Tg + 0,8.tr = 7,136 jam 6 Parameter hidrograf Parameter alfa a = 2.000 T 0,3 = 8,920 jam 0,5T 0,3 = 4,460 jam 1,5T 0,3 = 13,380 jam 2,0T 0,3 = 17,840 jam 7 Curah hujan spesifik R R = 1.000 mm 8 Debit puncak Qp = 7,732 m 3 dtmm 9 Base flow Qb = 3,866 m 3 dtmm Tabel 4.23 Distribusi Curah Hujan Rencana Log Pearson Type III Perioda ulang Curah hujan Nisbah Jam ke- Jam ke- 1 2 3 4 5 6 1 2 3 4 5 6 2 90,084 55 15 11 7 7 5 49,55 13,51 9,91 6,31 6,31 4,50 5 102,192 55 15 11 7 7 5 56,21 15,33 11,24 7,15 7,15 5,11 10 109,836 55 15 11 7 7 5 60,41 16,48 12,08 7,69 7,69 5,49 20 116,357 55 15 11 7 7 5 64,00 17,45 12,80 8,14 8,14 5,82 25 119,770 55 15 11 7 7 5 65,87 17,97 13,17 8,38 8,38 5,99 50 125,998 55 15 11 7 7 5 69,30 18,90 13,86 8,82 8,82 6,30 100 132,683 55 15 11 7 7 5 72,98 19,90 14,60 9,29 9,29 6,63 Tabel 4.24 HSS Nakayasu Debit Unit Hidrograf Waktu Lengkung Naik Lengkung Turun Debit Debit 0 t ≤ Tp Tp t ≤ T 0,3 T 0,3 t ≤ 1,5T 0,3 1,5T 0,3 t ≤ 24 Unit Hidrograf Unit Hidrograf t tTp 2.4 t-Tp t- Tp+0.5T 0,3 Qt t- Tp+1.5T 0,3 Qt jam T 0,3 1.5T 0,3 2T 0,3 m3dt m 3 dt 1 2 3 4 5 6 7 0,000 0,00000 0,00000 0,00000 0,500 0,01311 0,01311 0,10135 1,000 0,06918 0,06918 0,53495 1,500 0,18307 0,18307 1,41556 2,000 0,36516 0,36516 2,82346 2,500 0,62383 0,62383 4,82354 3,000 0,96627 0,96627 7,47139 3,500 1,39885 1,39885 10,81617 4,000 1,92732 1,92732 14,90233 4,500 2,55693 2,55693 19,77062 5,000 3,29259 3,29259 25,45882 5,500 4,13885 4,13885 32,00226 6,000 5,10002 5,10002 39,43421 6,500 6,18018 6,18018 47,78617 7,000 7,38320 7,38320 57,08809 7,136 7,73216 7,73216 59,78632 7,500 7,36146 7,36146 0,00109 8,000 6,88104 6,88104 0,00195 8,500 6,43198 6,43198 0,00335 9,000 6,01223 6,01223 0,00555 9,500 5,61987 5,61987 0,00891 Waktu Lengkung Naik Lengkung Turun Debit Debit 0 t ≤ Tp Tp t ≤ T 0,3 T 0,3 t ≤ 1,5T 0,3 1,5T 0,3 t ≤ 24 Unit Hidrograf Unit Hidrograf t tTp 2.4 t-Tp t- Tp+0.5T 0,3 Qt t- Tp+1.5T 0,3 Qt jam T 0,3 1.5T 0,3 2T 0,3 m3dt m 3 dt 1 2 3 4 5 6 7 10,000 5,25312 5,25312 0,01385 10,500 4,91030 4,91030 0,02093 11,000 4,58985 4,58985 0,03079 11,500 4,29031 4,29031 0,04416 12,000 4,01033 4,01033 0,06186 12,500 3,74861 3,74861 0,08477 13,000 3,50397 3,50397 0,11380 13,500 3,27530 3,27530 0,14987 14,000 3,06156 3,06156 0,19386 14,500 2,86176 2,86176 0,24657 15,000 2,67500 2,67500 0,30875 15,500 2,50043 2,50043 0,38096 16,000 2,33725 2,33725 0,46366 16,056 2,31965 2,31965 0,47359 16,500 2,22880 2,22880 0,52833 17,000 2,13074 2,13074 0,59454 17,500 2,03700 2,03700 0,66557 18,000 1,94739 1,94739 0,74140 18,500 1,86171 1,86171 0,82196 19,000 1,77981 1,77981 0,90715 19,500 1,70151 1,70151 0,99683 20,000 1,62665 1,62665 1,09084 20,500 1,55509 1,55509 1,18899 21,000 1,48667 1,48667 1,29108 21,500 1,42127 1,42127 1,39685 22,000 1,35874 1,35874 1,50607 22,500 1,29896 1,29896 1,61846 23,000 1,24181 1,24181 1,73373 23,500 1,18718 1,18718 1,85161 24,000 1,13495 1,13495 1,97178 24,500 1,08502 1,08502 2,09395 25,000 1,03729 1,03729 2,21782 25,500 0,99165 0,99165 2,34308 26,000 0,94802 0,94802 2,46944 26,500 0,90632 0,90632 2,59661 Waktu Lengkung Naik Lengkung Turun Debit Debit 0 t ≤ Tp Tp t ≤ T 0,3 T 0,3 t ≤ 1,5T 0,3 1,5T 0,3 t ≤ 24 Unit Hidrograf Unit Hidrograf t tTp 2.4 t-Tp t- Tp+0.5T 0,3 Qt t- Tp+1.5T 0,3 Qt jam T 0,3 1.5T 0,3 2T 0,3 m3dt m 3 dt 1 2 3 4 5 6 7 27,000 0,86644 0,86644 2,72431 27,500 0,82832 0,82832 2,85225 28,000 0,79188 0,79188 2,98018 28,500 0,75704 0,75704 3,10784 29,000 0,72374 0,72374 3,23499 29,436 0,69589 0,69589 3,34528 29,500 0,69290 0,69290 3,35738 30,000 0,66990 0,66990 3,45161 30,500 0,64768 0,64768 3,54523 31,000 0,62619 0,62619 3,63816 31,500 0,60541 0,60541 3,73031 32,000 0,58532 0,58532 3,82163 32,500 0,56590 0,56590 3,91205 33,000 0,54712 0,54712 4,00149 33,500 0,52897 0,52897 4,08991 34,000 0,51142 0,51142 4,17726 34,500 0,49445 0,49445 4,26348 35,000 0,47804 0,47804 4,34853 35,500 0,46218 0,46218 4,43238 36,000 0,44684 0,44684 4,51497 Tabel 4.25 Hidrograf Nakayasu T = 2 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 49,55 13,51 9,91 6,31 6,31 4,50 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,649 0,649 3,866 4,516 16.255,93 30.173,82 1,000 0,06918 3,428 3,428 3,866 7,294 26.258,14 56.431,96 1,500 0,18307 9,071 9,071 3,866 12,937 46.572,38 103.004,34 2,000 0,36516 18,092 4,934 23,027 3,866 26,893 96.813,45 199.817,79 2,500 0,62383 30,908 8,430 39,338 3,866 43,204 155.534,86 355.352,65 3,000 0,96627 47,875 13,057 60,932 3,866 64,798 233.274,28 588.626,92 3,500 1,39885 69,308 18,902 13,862 102,072 3,866 105,938 381.377,45 970.004,38 4,000 1,92732 95,492 26,043 19,098 140,633 3,866 144,499 520.197,26 1.490.201,63 4,500 2,55693 126,687 34,551 25,337 16,124 202,699 3,866 206,565 743.634,00 2.233.835,64 5,000 3,29259 163,136 44,492 32,627 20,763 261,017 3,866 264,883 953.580,43 3.187.416,06 5,500 4,13885 205,065 55,927 41,013 26,099 328,104 3,866 331,970 1.195.093,19 4.382.509,25 6,000 5,10002 252,688 68,915 50,538 32,160 32,160 436,461 3,866 440,327 1.585.177,10 5.967.686,35 6,500 6,18018 306,206 83,511 61,241 38,972 38,972 528,901 3,866 532,767 1.917.961,50 7.885.647,85 7,000 7,38320 365,811 99,767 73,162 46,558 46,558 33,256 665,111 3,866 668,977 2.408.316,91 10.293.964,76 7,136 7,73216 383,101 104,482 76,620 48,758 48,758 34,827 696,547 3,866 700,413 2.521.486,64 12.815.451,40 7,500 7,36146 364,734 99,473 72,947 46,421 46,421 33,158 663,152 3,866 667,018 2.401.265,42 15.216.716,82 8,000 6,88104 340,931 92,981 68,186 43,391 43,391 30,994 619,875 3,866 623,741 2.245.466,23 17.462.183,05 8,500 6,43198 318,682 86,913 63,736 40,559 40,559 28,971 579,421 3,866 583,287 2.099.834,54 19.562.017,59 9,000 6,01223 297,884 81,241 59,577 37,913 37,913 27,080 541,608 3,866 545,474 1.963.706,84 21.525.724,43 9,500 5,61987 278,444 75,939 55,689 35,438 35,438 25,313 506,262 3,866 510,129 1.836.462,88 23.362.187,31 10,000 5,25312 260,273 70,984 52,055 33,126 33,126 23,661 473,224 3,866 477,090 1.717.522,91 25.079.710,22 10,500 4,91030 243,287 66,351 48,657 30,964 30,964 22,117 442,341 3,866 446,207 1.606.345,01 26.686.055,23 11,000 4,58985 227,410 62,021 45,482 28,943 28,943 20,674 413,474 3,866 417,340 1.502.422,62 28.188.477,85 11,500 4,29031 212,570 57,974 42,514 27,054 27,054 19,325 386,490 3,866 390,356 1.405.282,24 29.593.760,08 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 49,55 13,51 9,91 6,31 6,31 4,50 m 3 dt m 3 dt m 3 dt m 3 m 3 12,000 4,01033 198,697 54,190 39,739 25,289 25,289 18,063 361,268 3,866 365,134 1.314.481,28 30.908.241,36 12,500 3,74861 185,730 50,654 37,146 23,638 23,638 16,885 337,691 3,866 341,557 1.229.606,02 32.137.847,39 13,000 3,50397 173,609 47,348 34,722 22,096 22,096 15,783 315,653 3,866 319,519 1.150.269,76 33.288.117,15 13,500 3,27530 162,280 44,258 32,456 20,654 20,654 14,753 295,054 3,866 298,920 1.076.111,01 34.364.228,16 14,000 3,06156 151,689 41,370 30,338 19,306 19,306 13,790 275,798 3,866 279,664 1.006.791,89 35.371.020,05 14,500 2,86176 141,790 38,670 28,358 18,046 18,046 12,890 257,800 3,866 261,666 941.996,56 36.313.016,61 15,000 2,67500 132,537 36,146 26,507 16,868 16,868 12,049 240,976 3,866 244,842 881.429,80 37.194.446,40 15,500 2,50043 123,887 33,787 24,777 15,767 15,767 11,262 225,249 3,866 229,115 824.815,64 38.019.262,05 16,000 2,33725 115,802 31,582 23,160 14,738 14,738 10,527 210,550 3,866 214,416 771.896,15 38.791.158,20 16,056 2,31965 114,930 31,345 22,986 14,627 14,627 10,448 208,964 3,866 212,830 766.188,52 39.557.346,71 16,500 2,22880 110,429 30,117 22,086 14,055 14,055 10,039 200,780 3,866 204,646 736.725,92 40.294.072,64 17,000 2,13074 105,571 28,792 21,114 13,436 13,436 9,597 191,947 3,866 195,813 704.926,42 40.998.999,05 17,500 2,03700 100,926 27,525 20,185 12,845 12,845 9,175 183,502 3,866 187,368 674.525,91 41.673.524,96 18,000 1,94739 96,486 26,314 19,297 12,280 12,280 8,771 175,429 3,866 179,295 645.462,86 42.318.987,82 18,500 1,86171 92,241 25,157 18,448 11,740 11,740 8,386 167,711 3,866 171,577 617.678,41 42.936.666,23 19,000 1,77981 88,183 24,050 17,637 11,223 11,223 8,017 160,333 3,866 164,199 591.116,33 43.527.782,56 19,500 1,70151 84,304 22,992 16,861 10,730 10,730 7,664 153,279 3,866 157,145 565.722,83 44.093.505,39 20,000 1,62665 80,595 21,980 16,119 10,258 10,258 7,327 146,536 3,866 150,402 541.446,50 44.634.951,89 20,500 1,55509 77,049 21,013 15,410 9,806 9,806 7,004 140,089 3,866 143,955 518.238,20 45.153.190,09 21,000 1,48667 73,659 20,089 14,732 9,375 9,375 6,696 133,926 3,866 137,792 496.050,93 45.649.241,01 21,500 1,42127 70,419 19,205 14,084 8,962 8,962 6,402 128,034 3,866 131,900 474.839,77 46.124.080,79 22,000 1,35874 67,321 18,360 13,464 8,568 8,568 6,120 122,401 3,866 126,267 454.561,79 46.578.642,57 22,500 1,29896 64,359 17,552 12,872 8,191 8,191 5,851 117,016 3,866 120,882 435.175,92 47.013.818,50 23,000 1,24181 61,527 16,780 12,305 7,831 7,831 5,593 111,868 3,866 115,734 416.642,93 47.430.461,43 23,500 1,18718 58,821 16,042 11,764 7,486 7,486 5,347 106,946 3,866 110,813 398.925,28 47.829.386,71 24,000 1,13495 56,233 15,336 11,247 7,157 7,157 5,112 102,241 3,866 106,108 381.987,11 48.211.373,82 24,500 1,08502 53,759 14,662 10,752 6,842 6,842 4,887 97,743 3,866 101,609 365.794,13 48.577.167,95 25,000 1,03729 51,394 14,016 10,279 6,541 6,541 4,672 93,443 3,866 97,309 350.313,54 48.927.481,49 25,500 0,99165 49,133 13,400 9,827 6,253 6,253 4,467 89,332 3,866 93,198 335.514,02 49.262.995,51 26,000 0,94802 46,971 12,810 9,394 5,978 5,978 4,270 85,402 3,866 89,268 321.365,59 49.584.361,10 26,500 0,90632 44,905 12,247 8,981 5,715 5,715 4,082 81,645 3,866 85,511 307.839,61 49.892.200,71 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 49,55 13,51 9,91 6,31 6,31 4,50 m 3 dt m 3 dt m 3 dt m 3 m 3 27,000 0,86644 42,929 11,708 8,586 5,464 5,464 3,903 78,053 3,866 81,919 294.908,70 50.187.109,41 27,500 0,82832 41,041 11,193 8,208 5,223 5,223 3,731 74,619 3,866 78,485 282.546,68 50.469.656,09 28,000 0,79188 39,235 10,700 7,847 4,994 4,994 3,567 71,336 3,866 75,202 270.728,52 50.740.384,60 28,500 0,75704 37,509 10,230 7,502 4,774 4,774 3,410 68,198 3,866 72,064 259.430,29 50.999.814,89 29,000 0,72374 35,859 9,780 7,172 4,564 4,564 3,260 65,198 3,866 69,064 248.629,11 51.248.444,00 29,436 0,69589 34,479 9,403 6,896 4,388 4,388 3,134 62,689 3,866 66,555 239.599,08 51.488.043,08 29,500 0,69290 34,330 9,363 6,866 4,369 4,369 3,121 62,419 3,866 66,285 238.626,42 51.726.669,50 30,000 0,66990 33,191 9,052 6,638 4,224 4,224 3,017 60,348 3,866 64,214 231.170,44 51.957.839,94 30,500 0,64768 32,090 8,752 6,418 4,084 4,084 2,917 58,346 3,866 62,212 223.961,86 52.181.801,80 31,000 0,62619 31,025 8,461 6,205 3,949 3,949 2,820 56,410 3,866 60,276 216.992,46 52.398.794,26 31,500 0,60541 29,996 8,181 5,999 3,818 3,818 2,727 54,538 3,866 58,404 210.254,31 52.609.048,57 32,000 0,58532 29,001 7,909 5,800 3,691 3,691 2,636 52,728 3,866 56,594 203.739,74 52.812.788,31 32,500 0,56590 28,038 7,647 5,608 3,569 3,569 2,549 50,979 3,866 54,845 197.441,32 53.010.229,63 33,000 0,54712 27,108 7,393 5,422 3,450 3,450 2,464 49,287 3,866 53,153 191.351,89 53.201.581,52 33,500 0,52897 26,209 7,148 5,242 3,336 3,336 2,383 47,652 3,866 51,518 185.464,51 53.387.046,04 34,000 0,51142 25,339 6,911 5,068 3,225 3,225 2,304 46,071 3,866 49,937 179.772,48 53.566.818,52 34,500 0,49445 24,498 6,681 4,900 3,118 3,118 2,227 44,542 3,866 48,408 174.269,32 53.741.087,83 35,000 0,47804 23,685 6,460 4,737 3,014 3,014 2,153 43,064 3,866 46,930 168.948,75 53.910.036,58 35,500 0,46218 22,899 6,245 4,580 2,914 2,914 2,082 41,635 3,866 45,501 163.804,72 54.073.841,30 36,000 0,44684 22,140 6,038 4,428 2,818 2,818 2,013 40,254 3,866 44,120 158.831,38 54.232.672,68 Grafik 4.1 Periode Ulang 2 Tahun Tabel 4.26 Hidrograf Nakayasu T = 5 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 56,21 15,33 11,24 7,15 7,15 5,11 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,737 0,737 3,866 4,603 16.570,17 30.488,06 1,000 0,06918 3,889 3,889 3,866 7,755 27.916,70 58.404,75 1,500 0,18307 10,290 10,290 3,866 14,156 50.961,22 109.365,97 2,000 0,36516 20,524 20,524 3,866 24,390 87.804,03 197.170,00 2,500 0,62383 35,063 9,563 44,625 3,866 48,491 174.568,49 371.738,50 3,000 0,96627 54,310 14,812 69,122 3,866 72,988 262.756,26 634.494,76 3,500 1,39885 78,623 21,443 15,725 115,791 3,866 119,657 430.764,84 1.065.259,60 4,000 1,92732 108,326 29,543 21,665 159,535 3,866 163,401 588.242,33 1.653.501,93 4,500 2,55693 143,714 39,195 28,743 18,291 229,942 3,866 233,808 841.709,47 2.495.211,40 5,000 3,29259 185,062 50,471 37,012 23,553 296,099 3,866 299,965 1.079.873,17 3.575.084,57 5,500 4,13885 232,626 63,444 46,525 29,607 372,202 3,866 376,068 1.353.845,78 4.928.930,35 6,000 5,10002 286,650 78,177 57,330 36,483 36,483 495,122 3,866 498,988 1.796.357,84 6.725.288,19 6,500 6,18018 347,361 94,735 69,472 44,210 44,210 599,986 3,866 603,853 2.173.869,20 8.899.157,40 7,000 7,38320 414,977 113,175 82,995 52,815 52,815 37,725 754,503 3,866 758,369 2.730.129,47 11.629.286,87 7,136 7,73216 434,590 118,525 86,918 55,312 55,312 39,508 790,164 3,866 794,030 2.858.509,47 14.487.796,34 7,500 7,36146 413,755 112,842 82,751 52,660 52,660 37,614 752,281 3,866 756,147 2.722.130,25 17.209.926,59 8,000 6,88104 386,753 105,478 77,351 49,223 49,223 35,159 703,187 3,866 707,053 2.545.391,29 19.755.317,88 8,500 6,43198 361,513 98,595 72,303 46,011 46,011 32,865 657,297 3,866 661,163 2.380.186,39 22.135.504,27 9,000 6,01223 337,921 92,160 67,584 43,008 43,008 30,720 614,401 3,866 618,267 2.225.762,82 24.361.267,09 9,500 5,61987 315,868 86,146 63,174 40,201 40,201 28,715 574,305 3,866 578,171 2.081.416,99 26.442.684,08 10,000 5,25312 295,254 80,524 59,051 37,578 37,578 26,841 536,826 3,866 540,692 1.946.491,22 28.389.175,30 10,500 4,91030 275,986 75,269 55,197 35,125 35,125 25,090 501,792 3,866 505,659 1.820.370,76 30.209.546,06 11,000 4,58985 257,975 70,357 51,595 32,833 32,833 23,452 469,045 3,866 472,911 1.702.480,97 31.912.027,03 11,500 4,29031 241,139 65,765 48,228 30,690 30,690 21,922 438,435 3,866 442,301 1.592.284,71 33.504.311,74 12,000 4,01033 225,403 61,473 45,081 28,688 28,688 20,491 409,823 3,866 413,689 1.489.279,90 34.993.591,64 12,500 3,74861 210,693 57,462 42,139 26,815 26,815 19,154 383,078 3,866 386,944 1.392.997,22 36.386.588,85 13,000 3,50397 196,943 53,712 39,389 25,065 25,065 17,904 358,078 3,866 361,944 1.302.997,98 37.689.586,84 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 56,21 15,33 11,24 7,15 7,15 5,11 m 3 dt m 3 dt m 3 dt m 3 m 3 13,500 3,27530 184,090 50,206 36,818 23,430 23,430 16,735 334,710 3,866 338,576 1.218.872,13 38.908.458,97 14,000 3,06156 172,076 46,930 34,415 21,901 21,901 15,643 312,866 3,866 316,732 1.140.236,37 40.048.695,34 14,500 2,86176 160,847 43,867 32,169 20,471 20,471 14,622 292,448 3,866 296,315 1.066.732,40 41.115.427,74 15,000 2,67500 150,350 41,004 30,070 19,135 19,135 13,668 273,363 3,866 277,229 998.025,33 42.113.453,07 15,500 2,50043 140,538 38,329 28,108 17,887 17,887 12,776 255,523 3,866 259,389 933.802,11 43.047.255,18 16,000 2,33725 131,366 35,827 26,273 16,719 16,719 11,942 238,848 3,866 242,714 873.770,12 43.921.025,30 16,056 2,31965 130,377 35,557 26,075 16,593 16,593 11,852 237,049 3,866 240,915 867.295,36 44.788.320,66 16,500 2,22880 125,271 34,165 25,054 15,944 15,944 11,388 227,765 3,866 231,631 833.872,93 45.622.193,59 17,000 2,13074 119,760 32,662 23,952 15,242 15,242 10,887 217,745 3,866 221,611 797.799,50 46.419.993,10 17,500 2,03700 114,491 31,225 22,898 14,572 14,572 10,408 208,165 3,866 212,031 763.313,10 47.183.306,20 18,000 1,94739 109,454 29,851 21,891 13,931 13,931 9,950 199,007 3,866 202,873 730.343,91 47.913.650,10 18,500 1,86171 104,639 28,538 20,928 13,318 13,318 9,513 190,252 3,866 194,118 698.825,17 48.612.475,28 19,000 1,77981 100,035 27,282 20,007 12,732 12,732 9,094 181,882 3,866 185,748 668.693,09 49.281.168,36 19,500 1,70151 95,634 26,082 19,127 12,172 12,172 8,694 173,880 3,866 177,746 639.886,64 49.921.055,00 20,000 1,62665 91,427 24,935 18,285 11,636 11,636 8,312 166,230 3,866 170,097 612.347,52 50.533.402,53 20,500 1,55509 87,404 23,838 17,481 11,124 11,124 7,946 158,917 3,866 162,783 586.019,97 51.119.422,50 21,000 1,48667 83,559 22,789 16,712 10,635 10,635 7,596 151,926 3,866 155,792 560.850,68 51.680.273,18 21,500 1,42127 79,883 21,786 15,977 10,167 10,167 7,262 145,242 3,866 149,108 536.788,70 52.217.061,88 22,000 1,35874 76,369 20,828 15,274 9,720 9,720 6,943 138,852 3,866 142,718 513.785,31 52.730.847,19 22,500 1,29896 73,009 19,912 14,602 9,292 9,292 6,637 132,743 3,866 136,609 491.793,94 53.222.641,13 23,000 1,24181 69,797 19,036 13,959 8,883 8,883 6,345 126,903 3,866 130,769 470.770,07 53.693.411,20 23,500 1,18718 66,726 18,198 13,345 8,492 8,492 6,066 121,320 3,866 125,186 450.671,13 54.144.082,34 24,000 1,13495 63,791 17,397 12,758 8,119 8,119 5,799 115,983 3,866 119,849 431.456,44 54.575.538,77 24,500 1,08502 60,984 16,632 12,197 7,762 7,762 5,544 110,880 3,866 114,746 413.087,08 54.988.625,85 25,000 1,03729 58,301 15,900 11,660 7,420 7,420 5,300 106,002 3,866 109,868 395.525,87 55.384.151,72 25,500 0,99165 55,736 15,201 11,147 7,094 7,094 5,067 101,339 3,866 105,205 378.737,25 55.762.888,97 26,000 0,94802 53,284 14,532 10,657 6,782 6,782 4,844 96,880 3,866 100,746 362.687,24 56.125.576,22 26,500 0,90632 50,940 13,893 10,188 6,483 6,483 4,631 92,618 3,866 96,484 347.343,34 56.472.919,56 27,000 0,86644 48,699 13,282 9,740 6,198 6,198 4,427 88,544 3,866 92,410 332.674,49 56.805.594,05 27,500 0,82832 46,556 12,697 9,311 5,925 5,925 4,232 84,648 3,866 88,514 318.650,99 57.124.245,04 28,000 0,79188 44,508 12,139 8,902 5,665 5,665 4,046 80,924 3,866 84,790 305.244,44 57.429.489,47 28,500 0,75704 42,550 11,605 8,510 5,415 5,415 3,868 77,364 3,866 81,230 292.427,70 57.721.917,17 29,000 0,72374 40,678 11,094 8,136 5,177 5,177 3,698 73,960 3,866 77,826 280.174,83 58.002.092,00 29,436 0,69589 39,113 10,667 7,823 4,978 4,978 3,556 71,115 3,866 74,981 269.931,13 58.272.023,13 29,500 0,69290 38,945 10,621 7,789 4,957 4,957 3,540 70,808 3,866 74,674 268.827,75 58.540.850,88 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 56,21 15,33 11,24 7,15 7,15 5,11 m 3 dt m 3 dt m 3 dt m 3 m 3 30,000 0,66990 37,652 10,269 7,530 4,792 4,792 3,423 68,459 3,866 72,325 260.369,67 58.801.220,55 30,500 0,64768 36,403 9,928 7,281 4,633 4,633 3,309 66,187 3,866 70,053 252.192,24 59.053.412,78 31,000 0,62619 35,195 9,599 7,039 4,479 4,479 3,200 63,991 3,866 67,857 244.286,13 59.297.698,92 31,500 0,60541 34,027 9,280 6,805 4,331 4,331 3,093 61,868 3,866 65,734 236.642,36 59.534.341,28 32,000 0,58532 32,898 8,972 6,580 4,187 4,187 2,991 59,815 3,866 63,681 229.252,22 59.763.593,50 32,500 0,56590 31,807 8,675 6,361 4,048 4,048 2,892 57,830 3,866 61,696 222.107,28 59.985.700,78 33,000 0,54712 30,751 8,387 6,150 3,914 3,914 2,796 55,912 3,866 59,778 215.199,42 60.200.900,19 33,500 0,52897 29,731 8,108 5,946 3,784 3,784 2,703 54,056 3,866 57,922 208.520,76 60.409.420,95 34,000 0,51142 28,745 7,839 5,749 3,658 3,658 2,613 52,263 3,866 56,129 202.063,71 60.611.484,66 34,500 0,49445 27,791 7,579 5,558 3,537 3,537 2,526 50,529 3,866 54,395 195.820,91 60.807.305,57 35,000 0,47804 26,869 7,328 5,374 3,420 3,420 2,443 48,852 3,866 52,718 189.785,24 60.997.090,81 35,500 0,46218 25,977 7,085 5,195 3,306 3,306 2,362 47,231 3,866 51,097 183.949,85 61.181.040,66 36,000 0,44684 25,115 6,850 5,023 3,196 3,196 2,283 45,664 3,866 49,530 178.308,07 61.359.348,73 Grafik 4.2 Periode Ulang 5 Tahun Tabel 4.27 Hidrograf Nakayasu T = 10 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 60,41 16,48 12,08 7,69 7,69 5,49 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,792 0,792 3,866 4,658 16.768,55 30.686,44 1,000 0,06918 4,179 4,179 3,866 8,045 28.963,76 59.650,20 1,500 0,18307 11,059 11,059 3,866 14,926 53.731,94 113.382,15 2,000 0,36516 22,059 6,016 28,075 3,866 31,941 114.988,46 228.370,61 2,500 0,62383 37,685 10,278 47,963 3,866 51,829 186.584,66 414.955,27 3,000 0,96627 58,372 15,920 74,292 3,866 78,158 281.368,59 696.323,86 3,500 1,39885 84,504 23,047 16,901 124,452 3,866 128,318 461.943,69 1.158.267,55 4,000 1,92732 116,428 31,753 23,286 171,467 3,866 175,333 631.200,00 1.789.467,55 4,500 2,55693 154,463 42,126 30,893 19,659 247,141 3,866 251,007 903.625,69 2.693.093,24 5,000 3,29259 198,904 54,246 39,781 25,315 318,246 3,866 322,112 1.159.603,29 3.852.696,53 5,500 4,13885 250,026 68,189 50,005 31,822 400,042 3,866 403,908 1.454.068,20 5.306.764,73 6,000 5,10002 308,090 84,025 61,618 39,211 39,211 532,156 3,866 536,022 1.929.678,77 7.236.443,50 6,500 6,18018 373,342 101,821 74,668 47,516 47,516 644,864 3,866 648,730 2.335.426,80 9.571.870,30 7,000 7,38320 446,016 121,641 89,203 56,766 56,766 40,547 810,938 3,866 814,804 2.933.293,60 12.505.163,90 7,136 7,73216 467,096 127,390 93,419 59,449 59,449 42,463 849,266 3,866 853,132 3.071.276,02 15.576.439,92 7,500 7,36146 444,702 121,282 88,940 56,598 56,598 40,427 808,549 3,866 812,416 2.924.696,06 18.501.135,98 8,000 6,88104 415,681 113,367 83,136 52,905 52,905 37,789 755,783 3,866 759,649 2.734.737,58 21.235.873,57 8,500 6,43198 388,553 105,969 77,711 49,452 49,452 35,323 706,461 3,866 710,327 2.557.175,87 23.793.049,44 9,000 6,01223 363,196 99,054 72,639 46,225 46,225 33,018 660,357 3,866 664,223 2.391.201,90 26.184.251,34 9,500 5,61987 339,494 92,589 67,899 43,208 43,208 30,863 617,262 3,866 621,128 2.236.059,45 28.420.310,79 10,000 5,25312 317,338 86,547 63,468 40,389 40,389 28,849 576,979 3,866 580,845 2.091.041,66 30.511.352,45 10,500 4,91030 296,629 80,899 59,326 37,753 37,753 26,966 539,325 3,866 543,191 1.955.487,78 32.466.840,23 11,000 4,58985 277,271 75,619 55,454 35,289 35,289 25,206 504,128 3,866 507,995 1.828.780,20 34.295.620,44 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 60,41 16,48 12,08 7,69 7,69 5,49 m 3 dt m 3 dt m 3 dt m 3 m 3 11,500 4,29031 259,176 70,684 51,835 32,986 32,986 23,561 471,229 3,866 475,095 1.710.341,61 36.005.962,04 12,000 4,01033 242,262 66,071 48,452 30,833 30,833 22,024 440,476 3,866 444,342 1.599.632,36 37.605.594,40 12,500 3,74861 226,452 61,760 45,290 28,821 28,821 20,587 411,731 3,866 415,597 1.496.148,04 39.101.742,44 13,000 3,50397 211,673 57,729 42,335 26,940 26,940 19,243 384,861 3,866 388,727 1.399.417,14 40.501.159,58 13,500 3,27530 197,860 53,962 39,572 25,182 25,182 17,987 359,745 3,866 363,611 1.308.998,94 41.810.158,52 14,000 3,06156 184,947 50,440 36,989 23,539 23,539 16,813 336,268 3,866 340,134 1.224.481,46 43.034.639,99 14,500 2,86176 172,877 47,148 34,575 22,003 22,003 15,716 314,323 3,866 318,189 1.145.479,63 44.180.119,62 15,000 2,67500 161,595 44,071 32,319 20,567 20,567 14,690 293,810 3,866 297,676 1.071.633,49 45.251.753,11 15,500 2,50043 151,050 41,195 30,210 19,225 19,225 13,732 274,636 3,866 278,502 1.002.606,57 46.254.359,68 16,000 2,33725 141,192 38,507 28,238 17,970 17,970 12,836 256,713 3,866 260,579 938.084,38 47.192.444,05 16,056 2,31965 140,129 38,217 28,026 17,835 17,835 12,739 254,780 3,866 258,646 931.125,33 48.123.569,38 16,500 2,22880 134,641 36,720 26,928 17,136 17,136 12,240 244,801 3,866 248,668 895.203,01 49.018.772,39 17,000 2,13074 128,717 35,105 25,743 16,382 16,382 11,702 234,032 3,866 237,898 856.431,39 49.875.203,78 17,500 2,03700 123,054 33,560 24,611 15,661 15,661 11,187 223,735 3,866 227,602 819.365,52 50.694.569,30 18,000 1,94739 117,641 32,084 23,528 14,972 14,972 10,695 213,892 3,866 217,758 783.930,33 51.478.499,63 18,500 1,86171 112,465 30,672 22,493 14,314 14,314 10,224 204,482 3,866 208,348 750.054,09 52.228.553,72 19,000 1,77981 107,517 29,323 21,503 13,684 13,684 9,774 195,486 3,866 199,352 717.668,22 52.946.221,95 19,500 1,70151 102,787 28,033 20,557 13,082 13,082 9,344 186,886 3,866 190,752 686.707,15 53.632.929,09 20,000 1,62665 98,265 26,800 19,653 12,506 12,506 8,933 178,664 3,866 182,530 657.108,19 54.290.037,28 20,500 1,55509 93,942 25,621 18,788 11,956 11,956 8,540 170,804 3,866 174,670 628.811,41 54.918.848,69 21,000 1,48667 89,809 24,493 17,962 11,430 11,430 8,164 163,289 3,866 167,155 601.759,54 55.520.608,24 21,500 1,42127 85,858 23,416 17,172 10,927 10,927 7,805 156,106 3,866 159,972 575.897,80 56.096.506,04 22,000 1,35874 82,081 22,386 16,416 10,447 10,447 7,462 149,238 3,866 153,104 551.173,83 56.647.679,87 22,500 1,29896 78,470 21,401 15,694 9,987 9,987 7,134 142,672 3,866 146,538 527.537,58 57.175.217,44 23,000 1,24181 75,017 20,459 15,003 9,548 9,548 6,820 136,395 3,866 140,261 504.941,19 57.680.158,63 23,500 1,18718 71,717 19,559 14,343 9,128 9,128 6,520 130,395 3,866 134,261 483.338,91 58.163.497,54 24,000 1,13495 68,562 18,699 13,712 8,726 8,726 6,233 124,658 3,866 128,524 462.687,01 58.626.184,55 24,500 1,08502 65,546 17,876 13,109 8,342 8,342 5,959 119,174 3,866 123,040 442.943,68 59.069.128,24 25,000 1,03729 62,662 17,090 12,532 7,975 7,975 5,697 113,931 3,866 117,797 424.068,95 59.493.197,19 25,500 0,99165 59,905 16,338 11,981 7,624 7,624 5,446 108,919 3,866 112,785 406.024,60 59.899.221,79 26,000 0,94802 57,270 15,619 11,454 7,289 7,289 5,206 104,127 3,866 107,993 388.774,10 60.287.995,89 26,500 0,90632 54,750 14,932 10,950 6,968 6,968 4,977 99,546 3,866 103,412 372.282,53 60.660.278,41 27,000 0,86644 52,341 14,275 10,468 6,662 6,662 4,758 95,166 3,866 99,032 356.516,49 61.016.794,90 27,500 0,82832 50,039 13,647 10,008 6,369 6,369 4,549 90,979 3,866 94,846 341.444,07 61.358.238,97 28,000 0,79188 47,837 13,047 9,567 6,088 6,088 4,349 86,977 3,866 90,843 327.034,75 61.685.273,72 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 60,41 16,48 12,08 7,69 7,69 5,49 m 3 dt m 3 dt m 3 dt m 3 m 3 28,500 0,75704 45,733 12,473 9,147 5,821 5,821 4,158 83,150 3,866 87,016 313.259,36 61.998.533,08 29,000 0,72374 43,721 11,924 8,744 5,564 5,564 3,975 79,492 3,866 83,358 300.090,01 62.298.623,09 29,436 0,69589 42,039 11,465 8,408 5,350 5,350 3,822 76,434 3,866 80,300 289.080,12 62.587.703,21 29,500 0,69290 41,857 11,416 8,371 5,327 5,327 3,805 76,105 3,866 79,971 287.894,21 62.875.597,42 30,000 0,66990 40,469 11,037 8,094 5,151 5,151 3,679 73,579 3,866 77,445 278.803,49 63.154.400,91 30,500 0,64768 39,126 10,671 7,825 4,980 4,980 3,557 71,138 3,866 75,004 270.014,41 63.424.415,33 31,000 0,62619 37,828 10,317 7,566 4,814 4,814 3,439 68,778 3,866 72,644 261.516,96 63.685.932,28 31,500 0,60541 36,572 9,974 7,314 4,655 4,655 3,325 66,495 3,866 70,362 253.301,46 63.939.233,74 32,000 0,58532 35,359 9,643 7,072 4,500 4,500 3,214 64,289 3,866 68,155 245.358,55 64.184.592,29 32,500 0,56590 34,186 9,323 6,837 4,351 4,351 3,108 62,156 3,866 66,022 237.679,19 64.422.271,48 33,000 0,54712 33,051 9,014 6,610 4,207 4,207 3,005 60,094 3,866 63,960 230.254,65 64.652.526,13 33,500 0,52897 31,955 8,715 6,391 4,067 4,067 2,905 58,100 3,866 61,966 223.076,45 64.875.602,58 34,000 0,51142 30,894 8,426 6,179 3,932 3,932 2,809 56,172 3,866 60,038 216.136,43 65.091.739,00 34,500 0,49445 29,869 8,146 5,974 3,802 3,802 2,715 54,308 3,866 58,174 209.426,68 65.301.165,69 35,000 0,47804 28,878 7,876 5,776 3,675 3,675 2,625 52,506 3,866 56,372 202.939,57 65.504.105,26 35,500 0,46218 27,920 7,615 5,584 3,553 3,553 2,538 50,764 3,866 54,630 196.667,70 65.700.772,96 36,000 0,44684 26,994 7,362 5,399 3,436 3,436 2,454 49,079 3,866 52,946 190.603,94 65.891.376,90 Grafik 4.3 Periode Ulang 10 Tahun Tabel 4.28 Hidrograf Nakayasu T = 20 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 64,00 17,45 12,80 8,14 8,14 5,82 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,839 0,839 3,866 4,705 16.937,80 30.855,69 1,000 0,06918 4,428 4,428 3,866 8,294 29.857,08 60.712,77 1,500 0,18307 11,716 11,716 3,866 15,582 56.095,81 116.808,58 2,000 0,36516 23,369 6,373 29,742 3,866 33,608 120.989,29 237.797,86 2,500 0,62383 39,923 10,888 50,811 3,866 54,677 196.836,34 434.634,20 3,000 0,96627 61,838 16,865 78,703 3,866 82,569 297.247,84 731.882,04 3,500 1,39885 89,521 24,415 17,904 131,841 3,866 135,707 488.544,15 1.220.426,19 4,000 1,92732 123,341 33,638 24,668 181,648 3,866 185,514 667.849,66 1.888.275,86 4,500 2,55693 163,634 44,627 32,727 20,826 261,814 3,866 265,681 956.449,98 2.844.725,83 5,000 3,29259 210,713 57,467 42,143 26,818 337,141 3,866 341,007 1.227.625,63 4.072.351,47 5,500 4,13885 264,871 72,237 52,974 33,711 423,793 3,866 427,659 1.539.573,70 5.611.925,16 6,000 5,10002 326,382 89,013 65,276 41,540 41,540 563,751 3,866 567,617 2.043.422,52 7.655.347,68 6,500 6,18018 395,508 107,866 79,102 50,337 50,337 683,151 3,866 687,017 2.473.260,88 10.128.608,56 7,000 7,38320 472,497 128,863 94,499 60,136 60,136 42,954 859,085 3,866 862,951 3.106.624,59 13.235.233,15 7,136 7,73216 494,829 134,953 98,966 62,978 62,978 44,984 899,689 3,866 903,555 3.252.799,39 16.488.032,54 7,500 7,36146 471,105 128,483 94,221 59,959 59,959 42,828 856,555 3,866 860,421 3.097.516,59 19.585.549,13 8,000 6,88104 440,361 120,098 88,072 56,046 56,046 40,033 800,656 3,866 804,522 2.896.279,78 22.481.828,91 8,500 6,43198 411,623 112,261 82,325 52,388 52,388 37,420 748,405 3,866 752,271 2.708.175,77 25.190.004,68 9,000 6,01223 384,760 104,935 76,952 48,969 48,969 34,978 699,564 3,866 703,430 2.532.347,48 27.722.352,16 9,500 5,61987 359,650 98,086 71,930 45,774 45,774 32,695 653,910 3,866 657,776 2.367.993,82 30.090.345,99 10,000 5,25312 336,180 91,685 67,236 42,786 42,786 30,562 611,236 3,866 615,102 2.214.365,95 32.304.711,93 10,500 4,91030 314,240 85,702 62,848 39,994 39,994 28,567 571,346 3,866 575,212 2.070.763,88 34.375.475,81 11,000 4,58985 293,733 80,109 58,747 37,384 37,384 26,703 534,060 3,866 537,926 1.936.533,34 36.312.009,15 11,500 4,29031 274,564 74,881 54,913 34,944 34,944 24,960 499,207 3,866 503,073 1.811.062,73 38.123.071,88 12,000 4,01033 256,646 69,994 51,329 32,664 32,664 23,331 466,628 3,866 470,495 1.693.780,38 39.816.852,27 12,500 3,74861 239,897 65,426 47,979 30,532 30,532 21,809 436,176 3,866 440,042 1.584.151,93 41.401.004,19 13,000 3,50397 224,241 61,157 44,848 28,540 28,540 20,386 407,711 3,866 411,577 1.481.677,87 42.882.682,06 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 64,00 17,45 12,80 8,14 8,14 5,82 m 3 dt m 3 dt m 3 dt m 3 m 3 13,500 3,27530 209,607 57,166 41,921 26,677 26,677 19,055 381,104 3,866 384,970 1.385.891,30 44.268.573,36 14,000 3,06156 195,928 53,435 39,186 24,936 24,936 17,812 356,233 3,866 360,099 1.296.355,80 45.564.929,16 14,500 2,86176 183,142 49,948 36,628 23,309 23,309 16,649 332,985 3,866 336,851 1.212.663,42 46.777.592,58 15,000 2,67500 171,190 46,688 34,238 21,788 21,788 15,563 311,254 3,866 315,120 1.134.432,84 47.912.025,41 15,500 2,50043 160,018 43,641 32,004 20,366 20,366 14,547 290,942 3,866 294,808 1.061.307,61 48.973.333,02 16,000 2,33725 149,575 40,793 29,915 19,037 19,037 13,598 271,955 3,866 275,821 992.954,56 49.966.287,59 16,056 2,31965 148,449 40,486 29,690 18,893 18,893 13,495 269,907 3,866 273,773 985.582,34 50.951.869,93 16,500 2,22880 142,635 38,900 28,527 18,154 18,154 12,967 259,336 3,866 263,202 947.527,21 51.899.397,14 17,000 2,13074 136,360 37,189 27,272 17,355 17,355 12,396 247,927 3,866 251,793 906.453,63 52.805.850,77 17,500 2,03700 130,361 35,553 26,072 16,591 16,591 11,851 237,019 3,866 240,885 867.187,05 53.673.037,82 18,000 1,94739 124,625 33,989 24,925 15,861 15,861 11,330 226,592 3,866 230,458 829.647,99 54.502.685,81 18,500 1,86171 119,143 32,493 23,829 15,164 15,164 10,831 216,623 3,866 220,489 793.760,43 55.296.446,24 19,000 1,77981 113,901 31,064 22,780 14,496 14,496 10,355 207,093 3,866 210,959 759.451,72 56.055.897,97 19,500 1,70151 108,890 29,697 21,778 13,859 13,859 9,899 197,982 3,866 201,848 726.652,41 56.782.550,38 20,000 1,62665 104,099 28,391 20,820 13,249 13,249 9,464 189,272 3,866 193,138 695.296,08 57.477.846,46 20,500 1,55509 99,520 27,142 19,904 12,666 12,666 9,047 180,945 3,866 184,811 665.319,26 58.143.165,71 21,000 1,48667 95,141 25,948 19,028 12,109 12,109 8,649 172,984 3,866 176,850 636.661,24 58.779.826,96 21,500 1,42127 90,956 24,806 18,191 11,576 11,576 8,269 165,374 3,866 169,240 609.264,02 59.389.090,98 22,000 1,35874 86,954 23,715 17,391 11,067 11,067 7,905 158,098 3,866 161,964 583.072,12 59.972.163,10 22,500 1,29896 83,129 22,671 16,626 10,580 10,580 7,557 151,143 3,866 155,009 558.032,52 60.530.195,63 23,000 1,24181 79,471 21,674 15,894 10,115 10,115 7,225 144,494 3,866 148,360 534.094,53 61.064.290,15 23,500 1,18718 75,975 20,720 15,195 9,670 9,670 6,907 138,137 3,866 142,003 511.209,67 61.575.499,82 24,000 1,13495 72,633 19,809 14,527 9,244 9,244 6,603 132,059 3,866 135,925 489.331,61 62.064.831,43 24,500 1,08502 69,437 18,937 13,887 8,837 8,837 6,312 126,249 3,866 130,116 468.416,07 62.533.247,50 25,000 1,03729 66,382 18,104 13,276 8,449 8,449 6,035 120,695 3,866 124,561 448.420,69 62.981.668,20 25,500 0,99165 63,462 17,308 12,692 8,077 8,077 5,769 115,385 3,866 119,251 429.305,00 63.410.973,20 26,000 0,94802 60,670 16,546 12,134 7,722 7,722 5,515 110,309 3,866 114,175 411.030,30 63.822.003,50 26,500 0,90632 58,001 15,818 11,600 7,382 7,382 5,273 105,456 3,866 109,322 393.559,57 64.215.563,07 27,000 0,86644 55,449 15,122 11,090 7,057 7,057 5,041 100,817 3,866 104,683 376.857,47 64.592.420,54 27,500 0,82832 53,010 14,457 10,602 6,747 6,747 4,819 96,381 3,866 100,247 360.890,16 64.953.310,69 28,000 0,79188 50,678 13,821 10,136 6,450 6,450 4,607 92,141 3,866 96,007 345.625,32 65.298.936,01 28,500 0,75704 48,448 13,213 9,690 6,166 6,166 4,404 88,087 3,866 91,953 331.032,05 65.629.968,06 29,000 0,72374 46,317 12,632 9,263 5,895 5,895 4,211 84,212 3,866 88,078 317.080,80 65.947.048,86 29,436 0,69589 44,535 12,146 8,907 5,668 5,668 4,049 80,972 3,866 84,838 305.417,23 66.252.466,09 29,500 0,69290 44,343 12,093 8,869 5,644 5,644 4,031 80,623 3,866 84,489 304.160,90 66.556.626,99 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 64,00 17,45 12,80 8,14 8,14 5,82 m 3 dt m 3 dt m 3 dt m 3 m 3 30,000 0,66990 42,871 11,692 8,574 5,456 5,456 3,897 77,948 3,866 81,814 294.530,44 66.851.157,43 30,500 0,64768 41,449 11,304 8,290 5,275 5,275 3,768 75,362 3,866 79,228 285.219,53 67.136.376,96 31,000 0,62619 40,074 10,929 8,015 5,100 5,100 3,643 72,861 3,866 76,727 276.217,56 67.412.594,53 31,500 0,60541 38,744 10,567 7,749 4,931 4,931 3,522 70,443 3,866 74,310 267.514,29 67.680.108,81 32,000 0,58532 37,458 10,216 7,492 4,767 4,767 3,405 68,106 3,866 71,972 259.099,79 67.939.208,60 32,500 0,56590 36,215 9,877 7,243 4,609 4,609 3,292 65,846 3,866 69,712 250.964,49 68.190.173,09 33,000 0,54712 35,014 9,549 7,003 4,456 4,456 3,183 63,661 3,866 67,528 243.099,13 68.433.272,22 33,500 0,52897 33,852 9,232 6,770 4,308 4,308 3,077 61,549 3,866 65,415 235.494,74 68.668.766,96 34,000 0,51142 32,729 8,926 6,546 4,165 4,165 2,975 59,507 3,866 63,373 228.142,67 68.896.909,63 34,500 0,49445 31,643 8,630 6,329 4,027 4,027 2,877 57,532 3,866 61,398 221.034,55 69.117.944,18 35,000 0,47804 30,593 8,344 6,119 3,894 3,894 2,781 55,623 3,866 59,490 214.162,28 69.332.106,46 35,500 0,46218 29,578 8,067 5,916 3,764 3,764 2,689 53,778 3,866 57,644 207.518,04 69.539.624,50 36,000 0,44684 28,596 7,799 5,719 3,640 3,640 2,600 51,993 3,866 55,860 201.094,26 69.740.718,76 Grafik 4.4 Periode Ulang 20 Tahun Tabel 4.29 Hidrograf Nakayasu T = 25 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 65,87 17,97 13,17 8,38 8,38 5,99 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,863 0,863 3,866 4,730 17.026,38 30.944,27 1,000 0,06918 4,557 4,557 3,866 8,423 30.324,60 61.268,87 1,500 0,18307 12,060 12,060 3,866 15,926 57.332,95 118.601,82 2,000 0,36516 24,054 6,560 30,614 3,866 34,481 124.129,86 242.731,68 2,500 0,62383 41,094 11,207 52,301 3,866 56,167 202.201,62 444.933,30 3,000 0,96627 63,652 17,360 81,011 3,866 84,877 305.558,36 750.491,66 3,500 1,39885 92,147 25,131 18,429 135,708 3,866 139,574 502.465,69 1.252.957,35 4,000 1,92732 126,959 34,625 25,392 186,976 3,866 190,842 687.030,51 1.939.987,87 4,500 2,55693 168,434 45,936 33,687 21,437 269,494 3,866 273,360 984.095,93 2.924.083,80 5,000 3,29259 216,894 59,153 43,379 27,605 347,030 3,866 350,896 1.263.225,60 4.187.309,40 5,500 4,13885 272,640 74,356 54,528 34,700 436,224 3,866 440,090 1.584.323,59 5.771.632,99 6,000 5,10002 335,956 91,624 67,191 42,758 42,758 580,287 3,866 584,153 2.102.951,09 7.874.584,08 6,500 6,18018 407,109 111,030 81,422 51,814 51,814 703,189 3,866 707,055 2.545.397,29 10.419.981,37 7,000 7,38320 486,356 132,643 97,271 61,900 61,900 44,214 884,284 3,866 888,150 3.197.338,56 13.617.319,93 7,136 7,73216 509,343 138,912 101,869 64,826 64,826 46,304 926,079 3,866 929,945 3.347.800,90 16.965.120,83 7,500 7,36146 484,924 132,252 96,985 61,718 61,718 44,084 881,679 3,866 885,545 3.187.963,41 20.153.084,25 8,000 6,88104 453,277 123,621 90,655 57,690 57,690 41,207 824,141 3,866 828,007 2.980.824,01 23.133.908,26 8,500 6,43198 423,696 115,554 84,739 53,925 53,925 38,518 770,357 3,866 774,223 2.787.202,60 25.921.110,86 9,000 6,01223 396,046 108,012 79,209 50,406 50,406 36,004 720,083 3,866 723,949 2.606.217,00 28.527.327,86 9,500 5,61987 370,200 100,964 74,040 47,116 47,116 33,655 673,090 3,866 676,956 2.437.042,59 30.964.370,45 10,000 5,25312 346,040 94,375 69,208 44,041 44,041 31,458 629,164 3,866 633,030 2.278.908,56 33.243.279,01 10,500 4,91030 323,458 88,216 64,692 41,167 41,167 29,405 588,105 3,866 591,971 2.131.094,42 35.374.373,43 11,000 4,58985 302,349 82,459 60,470 38,481 38,481 27,486 549,725 3,866 553,591 1.992.926,69 37.367.300,12 11,500 4,29031 282,617 77,077 56,523 35,969 35,969 25,692 513,849 3,866 517,716 1.863.775,83 39.231.075,95 12,000 4,01033 264,173 72,047 52,835 33,622 33,622 24,016 480,315 3,866 484,182 1.743.053,40 40.974.129,35 12,500 3,74861 246,933 67,345 49,387 31,428 31,428 22,448 448,970 3,866 452,836 1.630.209,37 42.604.338,73 13,000 3,50397 230,818 62,950 46,164 29,377 29,377 20,983 419,670 3,866 423,536 1.524.729,58 44.129.068,31 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 65,87 17,97 13,17 8,38 8,38 5,99 m 3 dt m 3 dt m 3 dt m 3 m 3 13,500 3,27530 215,755 58,842 43,151 27,460 27,460 19,614 392,282 3,866 396,148 1.426.133,45 45.555.201,75 14,000 3,06156 201,675 55,002 40,335 25,668 25,668 18,334 366,682 3,866 370,548 1.333.971,73 46.889.173,48 14,500 2,86176 188,514 51,413 37,703 23,993 23,993 17,138 342,752 3,866 346,618 1.247.824,52 48.136.998,00 15,000 2,67500 176,211 48,058 35,242 22,427 22,427 16,019 320,384 3,866 324,250 1.167.299,31 49.304.297,31 15,500 2,50043 164,711 44,921 32,942 20,963 20,963 14,974 299,475 3,866 303,341 1.092.029,20 50.396.326,51 16,000 2,33725 153,962 41,990 30,792 19,595 19,595 13,997 279,931 3,866 283,798 1.021.671,26 51.417.997,77 16,056 2,31965 152,803 41,674 30,561 19,448 19,448 13,891 277,824 3,866 281,690 1.014.082,79 52.432.080,56 16,500 2,22880 146,818 40,041 29,364 18,686 18,686 13,347 266,943 3,866 270,809 974.911,45 53.406.992,01 17,000 2,13074 140,359 38,280 28,072 17,864 17,864 12,760 255,199 3,866 259,065 932.633,11 54.339.625,13 17,500 2,03700 134,184 36,596 26,837 17,078 17,078 12,199 243,971 3,866 247,837 892.214,79 55.231.839,91 18,000 1,94739 128,281 34,986 25,656 16,327 16,327 11,662 233,238 3,866 237,104 853.574,64 56.085.414,55 18,500 1,86171 122,637 33,447 24,527 15,608 15,608 11,149 222,977 3,866 226,843 816.634,44 56.902.049,00 19,000 1,77981 117,242 31,975 23,448 14,922 14,922 10,658 213,167 3,866 217,033 781.319,41 57.683.368,41 19,500 1,70151 112,084 30,568 22,417 14,265 14,265 10,189 203,789 3,866 207,655 747.558,04 58.430.926,45 20,000 1,62665 107,153 29,224 21,431 13,638 13,638 9,741 194,823 3,866 198,689 715.281,98 59.146.208,43 20,500 1,55509 102,439 27,938 20,488 13,038 13,038 9,313 186,252 3,866 190,118 684.425,89 59.830.634,31 21,000 1,48667 97,932 26,709 19,586 12,464 12,464 8,903 178,058 3,866 181,924 654.927,29 60.485.561,60 21,500 1,42127 93,624 25,534 18,725 11,916 11,916 8,511 170,225 3,866 174,091 626.726,46 61.112.288,06 22,000 1,35874 89,505 24,410 17,901 11,391 11,391 8,137 162,736 3,866 166,602 599.766,32 61.712.054,38 22,500 1,29896 85,567 23,336 17,113 10,890 10,890 7,779 155,576 3,866 159,442 573.992,27 62.286.046,65 23,000 1,24181 81,802 22,310 16,360 10,411 10,411 7,437 148,732 3,866 152,598 549.352,13 62.835.398,78 23,500 1,18718 78,204 21,328 15,641 9,953 9,953 7,109 142,188 3,866 146,054 525.796,02 63.361.194,80 24,000 1,13495 74,763 20,390 14,953 9,515 9,515 6,797 135,933 3,866 139,799 503.276,25 63.864.471,04 24,500 1,08502 71,474 19,493 14,295 9,097 9,097 6,498 129,953 3,866 133,819 481.747,22 64.346.218,26 25,000 1,03729 68,329 18,635 13,666 8,696 8,696 6,212 124,235 3,866 128,101 461.165,35 64.807.383,61 25,500 0,99165 65,323 17,815 13,065 8,314 8,314 5,938 118,770 3,866 122,636 441.488,96 65.248.872,58 26,000 0,94802 62,449 17,032 12,490 7,948 7,948 5,677 113,545 3,866 117,411 422.678,23 65.671.550,81 26,500 0,90632 59,702 16,282 11,940 7,598 7,598 5,427 108,549 3,866 112,415 404.695,06 66.076.245,87 27,000 0,86644 57,076 15,566 11,415 7,264 7,264 5,189 103,774 3,866 107,640 387.503,06 66.463.748,93 27,500 0,82832 54,565 14,881 10,913 6,945 6,945 4,960 99,208 3,866 103,074 371.067,40 66.834.816,33 28,000 0,79188 52,164 14,227 10,433 6,639 6,639 4,742 94,844 3,866 98,710 355.354,82 67.190.171,15 28,500 0,75704 49,869 13,601 9,974 6,347 6,347 4,534 90,671 3,866 94,537 340.333,51 67.530.504,66 29,000 0,72374 47,675 13,002 9,535 6,068 6,068 4,334 86,682 3,866 90,548 325.973,05 67.856.477,70 29,436 0,69589 45,841 12,502 9,168 5,834 5,834 4,167 83,347 3,866 87,213 313.967,36 68.170.445,06 29,500 0,69290 45,643 12,448 9,129 5,809 5,809 4,149 82,988 3,866 86,854 312.674,19 68.483.119,25 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 65,87 17,97 13,17 8,38 8,38 5,99 m 3 dt m 3 dt m 3 dt m 3 m 3 30,000 0,66990 44,129 12,035 8,826 5,616 5,616 4,012 80,234 3,866 84,100 302.761,25 68.785.880,50 30,500 0,64768 42,665 11,636 8,533 5,430 5,430 3,879 77,572 3,866 81,438 293.177,24 69.079.057,74 31,000 0,62619 41,249 11,250 8,250 5,250 5,250 3,750 74,998 3,866 78,864 283.911,23 69.362.968,97 31,500 0,60541 39,880 10,876 7,976 5,076 5,076 3,625 72,510 3,866 76,376 274.952,67 69.637.921,64 32,000 0,58532 38,557 10,516 7,711 4,907 4,907 3,505 70,104 3,866 73,970 266.291,36 69.904.213,00 32,500 0,56590 37,278 10,167 7,456 4,744 4,744 3,389 67,778 3,866 71,644 257.917,44 70.162.130,44 33,000 0,54712 36,041 9,829 7,208 4,587 4,587 3,276 65,529 3,866 69,395 249.821,37 70.411.951,81 33,500 0,52897 34,845 9,503 6,969 4,435 4,435 3,168 63,354 3,866 67,221 241.993,94 70.653.945,75 34,000 0,51142 33,689 9,188 6,738 4,288 4,288 3,063 61,252 3,866 65,118 234.426,22 70.888.371,98 34,500 0,49445 32,571 8,883 6,514 4,145 4,145 2,961 59,220 3,866 63,086 227.109,61 71.115.481,59 35,000 0,47804 31,490 8,588 6,298 4,008 4,008 2,863 57,255 3,866 61,121 220.035,77 71.335.517,35 35,500 0,46218 30,445 8,303 6,089 3,875 3,875 2,768 55,355 3,866 59,221 213.196,64 71.548.713,99 36,000 0,44684 29,435 8,028 5,887 3,746 3,746 2,676 53,518 3,866 57,385 206.584,44 71.755.298,43 Grafik 4.5 Periode Ulang 25 Tahun Tabel 4.30 Hidrograf Nakayasu T = 50 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 69,30 18,90 13,86 8,82 8,82 6,30 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,908 0,908 3,866 4,774 17.188,04 31.105,93 1,000 0,06918 4,794 4,794 3,866 8,661 31.177,84 62.283,77 1,500 0,18307 12,687 12,687 3,866 16,553 59.590,79 121.874,56 2,000 0,36516 25,305 6,901 32,207 3,866 36,073 129.861,53 251.736,09 2,500 0,62383 43,231 11,790 55,021 3,866 58,887 211.993,48 463.729,57 3,000 0,96627 66,962 18,262 85,224 3,866 89,090 320.725,37 784.454,94 3,500 1,39885 96,939 26,438 19,388 142,765 3,866 146,631 527.873,04 1.312.327,98 4,000 1,92732 133,561 36,426 26,712 196,700 3,866 200,566 722.036,31 2.034.364,28 4,500 2,55693 177,193 48,325 35,439 22,552 283,509 3,866 287,375 1.034.550,87 3.068.915,15 5,000 3,29259 228,173 62,229 45,635 29,040 365,078 3,866 368,944 1.328.196,91 4.397.112,06 5,500 4,13885 286,819 78,223 57,364 36,504 458,910 3,866 462,776 1.665.993,88 6.063.105,94 6,000 5,10002 353,427 96,389 70,685 44,982 44,982 610,465 3,866 614,331 2.211.593,05 8.274.698,99 6,500 6,18018 428,281 116,804 85,656 54,509 54,509 739,759 3,866 743,625 2.677.049,04 10.951.748,03 7,000 7,38320 511,649 139,541 102,330 65,119 65,119 46,514 930,271 3,866 934,138 3.362.895,07 14.314.643,10 7,136 7,73216 535,832 146,136 107,166 68,197 68,197 48,712 974,240 3,866 978,106 3.521.182,33 17.835.825,43 7,500 7,36146 510,142 139,130 102,028 64,927 64,927 46,377 927,532 3,866 931,398 3.353.032,36 21.188.857,79 8,000 6,88104 476,850 130,050 95,370 60,690 60,690 43,350 867,001 3,866 870,867 3.135.120,50 24.323.978,28 8,500 6,43198 445,731 121,563 89,146 56,729 56,729 40,521 810,420 3,866 814,286 2.931.429,64 27.255.407,92 9,000 6,01223 416,642 113,630 83,328 53,027 53,027 37,877 757,532 3,866 761,398 2.741.031,73 29.996.439,65 9,500 5,61987 389,452 106,214 77,890 49,567 49,567 35,405 708,095 3,866 711,961 2.563.059,26 32.559.498,91 10,000 5,25312 364,036 99,283 72,807 46,332 46,332 33,094 661,884 3,866 665,750 2.396.701,33 34.956.200,24 10,500 4,91030 340,279 92,803 68,056 43,308 43,308 30,934 618,689 3,866 622,556 2.241.199,99 37.197.400,24 11,000 4,58985 318,072 86,747 63,614 40,482 40,482 28,916 578,314 3,866 582,180 2.095.846,73 39.293.246,96 11,500 4,29031 297,315 81,086 59,463 37,840 37,840 27,029 540,573 3,866 544,439 1.959.979,27 41.253.226,23 12,000 4,01033 277,912 75,794 55,582 35,371 35,371 25,265 505,295 3,866 509,161 1.832.978,57 43.086.204,80 12,500 3,74861 259,775 70,848 51,955 33,062 33,062 23,616 472,319 3,866 476,185 1.714.265,99 44.800.470,79 13,000 3,50397 242,822 66,224 48,564 30,905 30,905 22,075 441,495 3,866 445,361 1.603.300,63 46.403.771,43 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 69,30 18,90 13,86 8,82 8,82 6,30 m 3 dt m 3 dt m 3 dt m 3 m 3 13,500 3,27530 226,976 61,902 45,395 28,888 28,888 20,634 412,683 3,866 416,549 1.499.576,92 47.903.348,35 14,000 3,06156 212,163 57,863 42,433 27,003 27,003 19,288 385,751 3,866 389,617 1.402.622,25 49.305.970,60 14,500 2,86176 198,317 54,087 39,663 25,240 25,240 18,029 360,577 3,866 364,443 1.311.994,89 50.617.965,49 15,000 2,67500 185,375 50,557 37,075 23,593 23,593 16,852 337,046 3,866 340,912 1.227.281,89 51.845.247,38 15,500 2,50043 173,277 47,257 34,655 22,053 22,053 15,752 315,050 3,866 318,916 1.148.097,30 52.993.344,68 16,000 2,33725 161,969 44,173 32,394 20,614 20,614 14,724 294,490 3,866 298,356 1.074.080,33 54.067.425,01 16,056 2,31965 160,750 43,841 32,150 20,459 20,459 14,614 292,272 3,866 296,138 1.066.097,22 55.133.522,24 16,500 2,22880 154,454 42,124 30,891 19,658 19,658 14,041 280,825 3,866 284,691 1.024.888,74 56.158.410,97 17,000 2,13074 147,659 40,271 29,532 18,793 18,793 13,424 268,470 3,866 272,337 980.411,68 57.138.822,66 17,500 2,03700 141,163 38,499 28,233 17,966 17,966 12,833 256,659 3,866 260,525 937.891,37 58.076.714,02 18,000 1,94739 134,952 36,805 26,990 17,176 17,176 12,268 245,368 3,866 249,234 897.241,71 58.973.955,73 18,500 1,86171 129,015 35,186 25,803 16,420 16,420 11,729 234,573 3,866 238,439 858.380,40 59.832.336,13 19,000 1,77981 123,339 33,638 24,668 15,698 15,698 11,213 224,253 3,866 228,119 821.228,78 60.653.564,91 19,500 1,70151 117,913 32,158 23,583 15,007 15,007 10,719 214,387 3,866 218,253 785.711,62 61.439.276,53 20,000 1,62665 112,725 30,743 22,545 14,347 14,347 10,248 204,955 3,866 208,821 751.757,02 62.191.033,55 20,500 1,55509 107,766 29,391 21,553 13,716 13,716 9,797 195,938 3,866 199,805 719.296,23 62.910.329,78 21,000 1,48667 103,025 28,098 20,605 13,112 13,112 9,366 187,318 3,866 191,184 688.263,53 63.598.593,31 21,500 1,42127 98,493 26,862 19,699 12,535 12,535 8,954 179,077 3,866 182,943 658.596,10 64.257.189,40 22,000 1,35874 94,159 25,680 18,832 11,984 11,984 8,560 171,199 3,866 175,065 630.233,86 64.887.423,27 22,500 1,29896 90,017 24,550 18,003 11,457 11,457 8,183 163,667 3,866 167,533 603.119,41 65.490.542,68 23,000 1,24181 86,057 23,470 17,211 10,953 10,953 7,823 156,467 3,866 160,333 577.197,84 66.067.740,52 23,500 1,18718 82,271 22,437 16,454 10,471 10,471 7,479 149,583 3,866 153,449 552.416,68 66.620.157,20 24,000 1,13495 78,651 21,450 15,730 10,010 10,010 7,150 143,002 3,866 146,868 528.725,75 67.148.882,95 24,500 1,08502 75,191 20,507 15,038 9,570 9,570 6,836 136,711 3,866 140,577 506.077,08 67.654.960,03 25,000 1,03729 71,883 19,604 14,377 9,149 9,149 6,535 130,696 3,866 134,562 484.424,83 68.139.384,86 25,500 0,99165 68,721 18,742 13,744 8,746 8,746 6,247 124,946 3,866 128,813 463.725,16 68.603.110,03 26,000 0,94802 65,697 17,917 13,139 8,361 8,361 5,972 119,450 3,866 123,316 443.936,16 69.047.046,19 26,500 0,90632 62,807 17,129 12,561 7,994 7,994 5,710 114,194 3,866 118,060 425.017,76 69.472.063,95 27,000 0,86644 60,044 16,376 12,009 7,642 7,642 5,459 109,170 3,866 113,037 406.931,67 69.878.995,62 27,500 0,82832 57,402 15,655 11,480 7,306 7,306 5,218 104,368 3,866 108,234 389.641,27 70.268.636,89 28,000 0,79188 54,877 14,966 10,975 6,984 6,984 4,989 99,776 3,866 103,642 373.111,54 70.641.748,43 28,500 0,75704 52,463 14,308 10,493 6,677 6,677 4,769 95,386 3,866 99,253 357.309,03 70.999.057,46 29,000 0,72374 50,154 13,678 10,031 6,383 6,383 4,559 91,190 3,866 95,056 342.201,74 71.341.259,20 29,436 0,69589 48,225 13,152 9,645 6,138 6,138 4,384 87,682 3,866 91,548 329.571,69 71.670.830,89 29,500 0,69290 48,017 13,096 9,603 6,111 6,111 4,365 87,304 3,866 91,170 328.211,26 71.999.042,16 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 69,30 18,90 13,86 8,82 8,82 6,30 m 3 dt m 3 dt m 3 dt m 3 m 3 30,000 0,66990 46,424 12,661 9,285 5,908 5,908 4,220 84,407 3,866 88,273 317.782,80 72.316.824,95 30,500 0,64768 44,883 12,241 8,977 5,712 5,712 4,080 81,606 3,866 85,472 307.700,36 72.624.525,31 31,000 0,62619 43,394 11,835 8,679 5,523 5,523 3,945 78,898 3,866 82,765 297.952,46 72.922.477,77 31,500 0,60541 41,954 11,442 8,391 5,340 5,340 3,814 76,281 3,866 80,147 288.528,00 73.211.005,78 32,000 0,58532 40,562 11,062 8,112 5,162 5,162 3,687 73,750 3,866 77,616 279.416,26 73.490.422,04 32,500 0,56590 39,216 10,695 7,843 4,991 4,991 3,565 71,302 3,866 75,169 270.606,85 73.761.028,88 33,000 0,54712 37,915 10,340 7,583 4,826 4,826 3,447 68,937 3,866 72,803 262.089,74 74.023.118,62 33,500 0,52897 36,657 9,997 7,331 4,665 4,665 3,332 66,649 3,866 70,515 253.855,23 74.276.973,85 34,000 0,51142 35,441 9,666 7,088 4,511 4,511 3,222 64,438 3,866 68,304 245.893,95 74.522.867,80 34,500 0,49445 34,265 9,345 6,853 4,361 4,361 3,115 62,300 3,866 66,166 238.196,83 74.761.064,62 35,000 0,47804 33,128 9,035 6,626 4,216 4,216 3,012 60,233 3,866 64,099 230.755,10 74.991.819,73 35,500 0,46218 32,029 8,735 6,406 4,076 4,076 2,912 58,234 3,866 62,100 223.560,30 75.215.380,03 36,000 0,44684 30,966 8,445 6,193 3,941 3,941 2,815 56,302 3,866 60,168 216.604,23 75.431.984,25 Grafik 4.6 Periode Ulang 50 Tahun Tabel 4.31 Hidrograf Nakayasu T = 100 tahun Debit Puncak Qp = 7,732 dtk Base Flow Qb = 3,866 dtk Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 72,98 19,90 14,60 9,29 9,29 6,63 m 3 dt m 3 dt m 3 dt m 3 m 3 0,000 0,00000 0,000 0,000 3,866 3,866 13.917,89 13.917,89 0,500 0,01311 0,957 0,957 3,866 4,823 17.361,54 31.279,43 1,000 0,06918 5,049 5,049 3,866 8,915 32.093,57 63.373,00 1,500 0,18307 13,360 13,360 3,866 17,226 62.013,97 125.386,97 2,000 0,36516 26,648 7,268 33,915 3,866 37,781 136.012,93 261.399,90 2,500 0,62383 45,524 12,416 57,940 3,866 61,806 222.502,40 483.902,30 3,000 0,96627 70,515 19,231 89,746 3,866 93,612 337.003,07 820.905,37 3,500 1,39885 102,083 27,841 20,417 150,340 3,866 154,206 555.140,98 1.376.046,35 4,000 1,92732 140,648 38,358 28,130 207,135 3,866 211,002 759.605,60 2.135.651,96 4,500 2,55693 186,594 50,889 37,319 23,748 298,551 3,866 302,417 1.088.700,66 3.224.352,62 5,000 3,29259 240,279 65,531 48,056 30,581 384,447 3,866 388,313 1.397.926,12 4.622.278,74 5,500 4,13885 302,036 82,373 60,407 38,441 483,258 3,866 487,124 1.753.644,94 6.375.923,68 6,000 5,10002 372,178 101,503 74,436 47,368 47,368 642,854 3,866 646,720 2.328.190,93 8.704.114,61 6,500 6,18018 451,004 123,001 90,201 57,400 57,400 779,007 3,866 782,873 2.818.341,74 11.522.456,35 7,000 7,38320 538,795 146,944 107,759 68,574 68,574 48,981 979,627 3,866 983,493 3.540.575,41 15.063.031,75 7,136 7,73216 564,261 153,889 112,852 71,815 71,815 51,296 1025,929 3,866 1029,795 3.707.260,61 18.770.292,36 7,500 7,36146 537,208 146,511 107,442 68,372 68,372 48,837 976,742 3,866 980,608 3.530.189,42 22.300.481,78 8,000 6,88104 502,150 136,950 100,430 63,910 63,910 45,650 913,000 3,866 916,866 3.300.716,22 25.601.198,01 8,500 6,43198 469,379 128,013 93,876 59,739 59,739 42,671 853,417 3,866 857,283 3.086.218,53 28.687.416,54 9,000 6,01223 438,747 119,658 87,749 55,841 55,841 39,886 797,723 3,866 801,589 2.885.719,04 31.573.135,58 9,500 5,61987 410,115 111,849 82,023 52,196 52,196 37,283 745,663 3,866 749,529 2.698.304,22 34.271.439,79 10,000 5,25312 383,350 104,550 76,670 48,790 48,790 34,850 697,001 3,866 700,867 2.523.120,16 36.794.559,95 10,500 4,91030 358,333 97,727 71,667 45,606 45,606 32,576 651,514 3,866 655,380 2.359.368,68 39.153.928,63 11,000 4,58985 334,948 91,349 66,990 42,630 42,630 30,450 608,996 3,866 612,862 2.206.303,68 41.360.232,30 11,500 4,29031 313,089 85,388 62,618 39,848 39,848 28,463 569,253 3,866 573,119 2.063.227,76 43.423.460,06 12,000 4,01033 292,657 79,815 58,531 37,247 37,247 26,605 532,103 3,866 535,969 1.929.489,03 45.352.949,09 12,500 3,74861 273,558 74,607 54,712 34,816 34,816 24,869 497,378 3,866 501,244 1.804.478,13 47.157.427,22 13,000 3,50397 255,705 69,738 51,141 32,544 32,544 23,246 464,919 3,866 468,785 1.687.625,50 48.845.052,72 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 72,98 19,90 14,60 9,29 9,29 6,63 m 3 dt m 3 dt m 3 dt m 3 m 3 13,500 3,27530 239,018 65,187 47,804 30,420 30,420 21,729 434,578 3,866 438,444 1.578.398,71 50.423.451,44 14,000 3,06156 223,420 60,933 44,684 28,435 28,435 20,311 406,217 3,866 410,083 1.476.300,11 51.899.751,55 14,500 2,86176 208,839 56,956 41,768 26,580 26,580 18,985 379,707 3,866 383,573 1.380.864,50 53.280.616,04 15,000 2,67500 195,210 53,239 39,042 24,845 24,845 17,746 354,928 3,866 358,794 1.291.657,05 54.572.273,09 15,500 2,50043 182,471 49,765 36,494 23,224 23,224 16,588 331,765 3,866 335,631 1.208.271,31 55.780.544,40 16,000 2,33725 170,563 46,517 34,113 21,708 21,708 15,506 310,114 3,866 313,980 1.130.327,36 56.910.871,76 16,056 2,31965 169,278 46,167 33,856 21,544 21,544 15,389 307,779 3,866 311,645 1.121.920,71 58.032.792,46 16,500 2,22880 162,648 44,359 32,530 20,701 20,701 14,786 295,724 3,866 299,591 1.078.525,90 59.111.318,37 17,000 2,13074 155,493 42,407 31,099 19,790 19,790 14,136 282,714 3,866 286,580 1.031.689,11 60.143.007,48 17,500 2,03700 148,652 40,541 29,730 18,919 18,919 13,514 270,276 3,866 274,142 986.912,88 61.129.920,35 18,000 1,94739 142,112 38,758 28,422 18,087 18,087 12,919 258,386 3,866 262,252 944.106,54 62.074.026,89 18,500 1,86171 135,860 37,053 27,172 17,291 17,291 12,351 247,018 3,866 250,884 903.183,45 62.977.210,34 19,000 1,77981 129,883 35,423 25,977 16,531 16,531 11,808 236,151 3,866 240,017 864.060,74 63.841.271,09 19,500 1,70151 124,169 33,864 24,834 15,803 15,803 11,288 225,761 3,866 229,628 826.659,22 64.667.930,31 20,000 1,62665 118,706 32,374 23,741 15,108 15,108 10,791 215,829 3,866 219,695 790.903,15 65.458.833,45 20,500 1,55509 113,484 30,950 22,697 14,443 14,443 10,317 206,334 3,866 210,200 756.720,15 66.215.553,60 21,000 1,48667 108,491 29,588 21,698 13,808 13,808 9,863 197,256 3,866 201,123 724.041,01 66.939.594,61 21,500 1,42127 103,718 28,287 20,744 13,200 13,200 9,429 188,578 3,866 192,444 692.799,57 67.632.394,17 22,000 1,35874 99,155 27,042 19,831 12,620 12,620 9,014 180,282 3,866 184,148 662.932,57 68.295.326,75 22,500 1,29896 94,793 25,853 18,959 12,065 12,065 8,618 172,350 3,866 176,217 634.379,56 68.929.706,31 23,000 1,24181 90,622 24,715 18,124 11,534 11,534 8,238 164,768 3,866 168,634 607.082,72 69.536.789,03 23,500 1,18718 86,636 23,628 17,327 11,026 11,026 7,876 157,519 3,866 161,385 580.986,79 70.117.775,81 24,000 1,13495 82,824 22,588 16,565 10,541 10,541 7,529 150,589 3,866 154,455 556.038,93 70.673.814,75 24,500 1,08502 79,180 21,595 15,836 10,077 10,077 7,198 143,964 3,866 147,830 532.188,64 71.206.003,39 25,000 1,03729 75,697 20,645 15,139 9,634 9,634 6,882 137,630 3,866 141,497 509.387,63 71.715.391,01 25,500 0,99165 72,367 19,736 14,473 9,210 9,210 6,579 131,576 3,866 135,442 487.589,73 72.202.980,75 26,000 0,94802 69,183 18,868 13,837 8,805 8,805 6,289 125,787 3,866 129,653 466.750,82 72.669.731,57 26,500 0,90632 66,139 18,038 13,228 8,418 8,418 6,013 120,253 3,866 124,119 446.828,71 73.116.560,29 27,000 0,86644 63,229 17,244 12,646 8,047 8,047 5,748 114,963 3,866 118,829 427.783,06 73.544.343,34 27,500 0,82832 60,448 16,486 12,090 7,693 7,693 5,495 109,905 3,866 113,771 409.575,31 73.953.918,65 28,000 0,79188 57,788 15,760 11,558 7,355 7,355 5,253 105,070 3,866 108,936 392.168,60 74.346.087,25 28,500 0,75704 55,246 15,067 11,049 7,031 7,031 5,022 100,447 3,866 104,313 375.527,68 74.721.614,93 29,000 0,72374 52,815 14,404 10,563 6,722 6,722 4,801 96,028 3,866 99,894 359.618,88 75.081.233,81 29,436 0,69589 50,783 13,850 10,157 6,463 6,463 4,617 92,334 3,866 96,200 346.318,73 75.427.552,54 29,500 0,69290 50,565 13,790 10,113 6,435 6,435 4,597 91,936 3,866 95,802 344.886,13 75.772.438,67 Waktu Unit Hidrograf Design Rainfall mm jam Limpasan Base Total Volume Volume Qt 1 2 3 4 5 6 Langsung Flow Debit Kumulatif jam m 3 dt 72,98 19,90 14,60 9,29 9,29 6,63 m 3 dt m 3 dt m 3 dt m 3 m 3 30,000 0,66990 48,887 13,333 9,777 6,222 6,222 4,444 88,885 3,866 92,751 333.904,38 76.106.343,06 30,500 0,64768 47,265 12,890 9,453 6,016 6,016 4,297 85,936 3,866 89,802 323.287,02 76.429.630,08 31,000 0,62619 45,696 12,463 9,139 5,816 5,816 4,154 83,084 3,866 86,951 313.021,94 76.742.652,02 31,500 0,60541 44,180 12,049 8,836 5,623 5,623 4,016 80,328 3,866 84,194 303.097,47 77.045.749,49 32,000 0,58532 42,714 11,649 8,543 5,436 5,436 3,883 77,662 3,866 81,528 293.502,30 77.339.251,80 32,500 0,56590 41,297 11,263 8,259 5,256 5,256 3,754 75,085 3,866 78,952 284.225,51 77.623.477,30 33,000 0,54712 39,927 10,889 7,985 5,082 5,082 3,630 72,594 3,866 76,460 275.256,52 77.898.733,82 33,500 0,52897 38,602 10,528 7,720 4,913 4,913 3,509 70,185 3,866 74,051 266.585,13 78.165.318,95 34,000 0,51142 37,321 10,178 7,464 4,750 4,750 3,393 67,857 3,866 71,723 258.201,46 78.423.520,41 34,500 0,49445 36,083 9,841 7,217 4,592 4,592 3,280 65,605 3,866 69,471 250.095,97 78.673.616,38 35,000 0,47804 34,886 9,514 6,977 4,440 4,440 3,171 63,428 3,866 67,294 242.259,42 78.915.875,80 35,500 0,46218 33,728 9,199 6,746 4,293 4,293 3,066 61,324 3,866 65,190 234.682,90 79.150.558,70 36,000 0,44684 32,609 8,893 6,522 4,150 4,150 2,964 59,289 3,866 63,155 227.357,77 79.377.916,47 Grafik 4.7 Periode Ulang 100 Tahun Grafik 4.8 Hidrograf Nakayasu Berbagai Kala Ulang Tabel 4.32 Debit Banjir Rencana Metode Nakayashu Berdasarkan hasil perhitungan debit banjir rencana dengan menggunakan metode HSS Nakayashu untuk periode T = 2 tahun sampai dengan T =100 tahun. Secara umum nilai debit banjir yang didapat terlihat berfluktuasi meningkat pada beberapa periode diatas, Dimana hasil perhitungan debit di atas memiliki perbedaan yang cukup signifikan dibanding data debit pengukuran di lapangan, hal ini disebabkan oleh beberapa faktor di antaranya: Human error, yaitu terjadinya kesalahan perhitungan dalam mengkalkulasikan maupun menginput data terkait DAS Percut dalam analisis perhitungan debit banjir rencana, sama halnya dengan pengukuran debit sungai dilapangan semisal pada pencatatan hasil pengukuran Pos Duga Air. Kesalahan alat juga dapat mempengaruhi hasil pengukuran debit banjir di lapangan semisal terjadinya kerusakan pada alat pengukur tersebut, dan perlunya penempatan pos duga pada beberapa titik sehingga perhitungan debit banjir sungai percut dapat lebih akurat. No Periode Tahun Debit m 3 detik 1 2 700,413 2 5 794,030 3 10 853,132 4 20 903,555 5 25 929,945 6 50 976,106 7 100 1029.795 Faktor alam seperti gerusan pada penampang sungai serta proses sedimentasi juga mempengaruhi besarnya debit di lapangan, hal ini dapat menjadikan perbedaan yang cukup signifikan di lapangan terhadap analisis perhitungan debit banjir rencana dengan menggunakan HSS Nakayashu.

4.5. Perhitungan inflow DAS Percut Dengan Metode Muskingum

Parameter-parameter yang diketahui dalam perhitungan ini adalah: • Δt = ½ jam • K = 2 jam • X = 0,1 sampai dengan 0,5 Dari persamaan 2-29 sampai 2-31 pada bab II didapatkan nilai • C = -0,081 • C 1 = 0,351 • C 2 = 0,729 Dari persamaan 2-32 pada bab II didapatkan nilai • C + C 1 + C 2 = 1 ok Perhitungan lengkap inflow DAS Deli untuk T = 2 Tahun dapat dilihat Dengan memasukkan hasil perhitungan inflow, outflow dan storage untuk T = 2 Tahun didapat hidrograf inflow-outflow dan storage pada grafik berikut. Grafik 4.9. Hydrograf Inflow-Outflow T = 2 Tahun Grafik 4.10. Hydrograf Storage T = 2 Tahun Grafik 4.11. Hydrograf Inflow-Outflow T = 5 Tahun Grafik 4.12. Hydrograf Storage T = 5 Tahun Perhitungan lengkap inflow DAS Deli untuk periode ulang T = 10 Tahun sampai dengan 100 tahun dapat dilihat dengan memasukkan hasil perhitungan inflow, outflow dan storage untuk masing-masing periode ulang didapat hidrograf inflow-outflow dan storage pada grafik-grafik berikut. Grafik 4.13. Hydrograf Inflow-Outflow T = 10 Tahun Grafik 4.14. Hydrograf Storage T = 10 Tahun Grafik 4.15. Hydrograf Inflow-Outflow T = 20 Tahun Grafik 4.16. Hydrograf Storage T = 20 Tahun Grafik 4.17. Hydrograf Inflow-Outflow T = 50 Tahun Grafik 4.18. Hydrograf Storage T = 50 Tahun Grafik 4.19. Hydrograf Inflow-Outflow T = 100 Tahun Grafik 4.20. Hydrograf Storage T = 100 Tahun