Unit Hidrograf Satuan Sintetik HSS Gama-I Hujan Efektif Jam-Jaman

Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 125 JOKO SANTOSO L2A 001 086 15 , 15 , 4858 , 10 t t f    Tabel 4.25 Hasil Perhitungan Infiltrasi Waktu t jam Infiltrasi f mm Waktu t jam Infiltrasi t mm 1 10,490 13 7,140 2 9,454 14 7,061 3 8,896 15 6,988 4 8,521 16 6,921 5 8,240 17 6,858 6 8,018 18 6,800 7 7,835 19 6,745 8 7,679 20 6,693 9 7,545 21 6,644 10 7,426 22 6,598 11 7,321 23 6,554 12 7,226 24 6,513

h. Unit Hidrograf Satuan Sintetik HSS Gama-I

Kurva hidrograf merupakan garis lurus sampai pada debit puncak Qp, sedangkan untuk debit yang terjadi pada jam ke-t dan setelahnya setelah TR pada sumbu horizontal, maka ditentukan dengan persamaan berikut : k t p t e Q Q   . Sri Harto, 1981 Dimana : Qt = Debit yang terjadi pada jam ke-t Qp = Debit puncak t = waktu k = Faktor tampungan Tabel 4.26 Hasil Perhitungan Qt Waktu t jam Faktor Tampungan k tk Debit Puncak Qp m 3 detik Qt m 3 detik 3,8521 0,0000 0,0000 1 3,8521 0,2596 0,6684 0,5156 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 126 JOKO SANTOSO L2A 001 086 Waktu t jam Faktor Tampungan k tk Debit Puncak Qp m 3 detik Qt m 3 detik 1,5345 3,8521 0,3316 0,6684 0,4797 2 3,8521 0,5192 0,6684 0,3977 3 3,8521 0,7788 0,6684 0,3068 4 3,8521 1,0384 0,6684 0,2366 5 3,8521 1,2980 0,6684 0,1825 6 3,8521 1,5576 0,6684 0,1408 7 3,8521 1,8172 0,6684 0,1086 8 3,8521 2,0768 0,6684 0,0838 9 3,8521 2,3364 0,6684 0,0646 10 3,8521 2,5960 0,6684 0,0498 11 3,8521 2,8556 0,6684 0,0384 12 3,8521 3,1152 0,6684 0,0297 13 3,8521 3,3748 0,6684 0,0229 14 3,8521 3,6344 0,6684 0,0176 15 3,8521 3,8940 0,6684 0,0136 16 3,8521 4,1535 0,6684 0,0105 17 3,8521 4,4131 0,6684 0,0081 18 3,8521 4,6727 0,6684 0,0062 19 3,8521 4,9323 0,6684 0,0048 20 3,8521 5,1919 0,6684 0,0037 21 3,8521 5,4515 0,6684 0,0029 22 3,8521 5,7111 0,6684 0,0022 23 3,8521 5,9707 0,6684 0,0017 24 3,8521 6,2303 0,6684 0,0013 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 127 JOKO SANTOSO L2A 001 086 Hidrograf Satuan Sintetik HSS Gama-I 0.0 0.1 0.2 0.3 0.4 0.5 0.6 2 4 6 8 10 12 14 16 18 20 22 24 t jam Q t m 3 d e t Gambar 4-3 Hidrograf Satuan Sintetik HSS Gama-I

i. Hujan Efektif Jam-Jaman

Re = I – f Sri Harto, 1981 di mana : Re = Hujan Efektif mmjam I = Intensitas Hujan mmjam f = Infiltrasi mmjam Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 128 JOKO SANTOSO L2A 001 086 Tabel 4.27 Perhitungan Hujan Efektif Tiap Jam pada Periode Ulang 2 Tahun t jam R mm I mmjam I f mm Re mmjam 1 131,1595 45,4705 15,9598 10,4901 34,9803 2 131,1595 28,6446 10,0541 9,4543 19,1903 3 131,1595 21,8599 7,6727 8,8964 12,9635 4 131,1595 18,0450 6,3337 8,5206 9,5243 5 131,1595 15,5507 5,4582 8,2402 7,3105 6 131,1595 13,7709 4,8335 8,0179 5,7530 7 131,1595 12,4260 4,3614 7,8346 4,5914 8 131,1595 11,3676 3,9900 7,6792 3,6884 9 131,1595 10,5092 3,6886 7,5448 2,9644 10 131,1595 9,7963 3,4384 7,4265 2,3699 11 131,1595 9,1932 3,2268 7,3210 1,8722 12 131,1595 8,6751 3,0449 7,2261 1,4490 13 131,1595 8,2243 2,8867 7,1399 1,0845 14 131,1595 7,8279 2,7475 7,0609 0,7669 15 131,1595 7,4760 2,6240 6,9882 0,4877 16 131,1595 7,1611 2,5135 6,9209 0,2402 17 131,1595 6,8775 2,4140 6,8583 0,0192 18 131,1595 6,6204 2,3237 6,7997 0,0000 19 131,1595 6,3860 2,2414 6,7448 0,0000 20 131,1595 6,1713 2,1661 6,6931 0,0000 21 131,1595 5,9738 2,0968 6,6443 0,0000 22 131,1595 5,7914 2,0327 6,5981 0,0000 23 131,1595 5,6223 1,9734 6,5542 0,0000 24 131,1595 5,4650 1,9182 6,5125 0,0000 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 129 JOKO SANTOSO L2A 001 086 Tabel 4.28 Perhitungan Hujan Efektif Periode Ulang 5 th t jam R mm I mmjam I f mm Re mmjam 1 182,0958 63,1291 15,9598 10,4901 52,6389 2 182,0958 39,7688 10,0541 9,4543 30,3146 3 182,0958 30,3493 7,6727 8,8964 21,4529 4 182,0958 25,0528 6,3337 8,5206 16,5321 5 182,0958 21,5898 5,4582 8,2402 13,3497 6 182,0958 19,1189 4,8335 8,0179 11,1010 7 182,0958 17,2517 4,3614 7,8346 9,4171 8 182,0958 15,7823 3,9900 7,6792 8,1030 9 182,0958 14,5904 3,6886 7,5448 7,0457 10 182,0958 13,6007 3,4384 7,4265 6,1743 11 182,0958 12,7634 3,2268 7,3210 5,4424 12 182,0958 12,0441 3,0449 7,2261 4,8180 13 182,0958 11,4183 2,8867 7,1399 4,2784 14 182,0958 10,8679 2,7475 7,0609 3,8069 15 182,0958 10,3793 2,6240 6,9882 3,3911 16 182,0958 9,9422 2,5135 6,9209 3,0213 17 182,0958 9,5484 2,4140 6,8583 2,6901 18 182,0958 9,1914 2,3237 6,7997 2,3917 19 182,0958 8,8660 2,2414 6,7448 2,1212 20 182,0958 8,5679 2,1661 6,6931 1,8748 21 182,0958 8,2937 2,0968 6,6443 1,6494 22 182,0958 8,0405 2,0327 6,5981 1,4424 23 182,0958 7,8057 1,9734 6,5542 1,2514 24 182,0958 7,5873 1,9182 6,5125 1,0748 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 130 JOKO SANTOSO L2A 001 086 Tabel 4.29 Perhitungan Hujan Efektif Periode Ulang 10 th t jam R mm I mmjam I f mm Re mmjam 1 220,1405 76,3184 15,9598 10,4901 65,8283 2 220,1405 48,0776 10,0541 9,4543 38,6234 3 220,1405 36,6901 7,6727 8,8964 27,7937 4 220,1405 30,2870 6,3337 8,5206 21,7663 5 220,1405 26,1005 5,4582 8,2402 17,8604 6 220,1405 23,1133 4,8335 8,0179 15,0954 7 220,1405 20,8560 4,3614 7,8346 13,0214 8 220,1405 19,0796 3,9900 7,6792 11,4004 9 220,1405 17,6388 3,6886 7,5448 10,0940 10 220,1405 16,4423 3,4384 7,4265 9,0159 11 220,1405 15,4301 3,2268 7,3210 8,1090 12 220,1405 14,5605 3,0449 7,2261 7,3344 13 220,1405 13,8039 2,8867 7,1399 6,6640 14 220,1405 13,1385 2,7475 7,0609 6,0775 15 220,1405 12,5478 2,6240 6,9882 5,5596 16 220,1405 12,0194 2,5135 6,9209 5,0985 17 220,1405 11,5433 2,4140 6,8583 4,6850 18 220,1405 11,1117 2,3237 6,7997 4,3120 19 220,1405 10,7183 2,2414 6,7448 3,9735 20 220,1405 10,3580 2,1661 6,6931 3,6649 21 220,1405 10,0265 2,0968 6,6443 3,3822 22 220,1405 9,7203 2,0327 6,5981 3,1222 23 220,1405 9,4365 1,9734 6,5542 2,8823 24 220,1405 9,1725 1,9182 6,5125 2,6600 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 131 JOKO SANTOSO L2A 001 086 Tabel 4.30 Perhitungan Hujan Efektif Periode Ulang 50 th t jam R mm I mmjam I f mm Re mmjam 1 319,3007 110,6954 15,9598 10,4901 100,2052 2 319,3007 69,7337 10,0541 9,4543 60,2795 3 319,3007 53,2168 7,6727 8,8964 44,3204 4 319,3007 43,9295 6,3337 8,5206 35,4088 5 319,3007 37,8573 5,4582 8,2402 29,6171 6 319,3007 33,5245 4,8335 8,0179 25,5066 7 319,3007 30,2504 4,3614 7,8346 22,4158 8 319,3007 27,6738 3,9900 7,6792 19,9946 9 319,3007 25,5840 3,6886 7,5448 18,0392 10 319,3007 23,8486 3,4384 7,4265 16,4221 11 319,3007 22,3804 3,2268 7,3210 15,0594 12 319,3007 21,1191 3,0449 7,2261 13,8930 13 319,3007 20,0217 2,8867 7,1399 12,8818 14 319,3007 19,0565 2,7475 7,0609 11,9956 15 319,3007 18,1999 2,6240 6,9882 11,2116 16 319,3007 17,4334 2,5135 6,9209 10,5125 17 319,3007 16,7429 2,4140 6,8583 9,8846 18 319,3007 16,1169 2,3237 6,7997 9,3172 19 319,3007 15,5463 2,2414 6,7448 8,8015 20 319,3007 15,0237 2,1661 6,6931 8,3306 21 319,3007 14,5429 2,0968 6,6443 7,8986 22 319,3007 14,0988 2,0327 6,5981 7,5007 23 319,3007 13,6871 1,9734 6,5542 7,1328 24 319,3007 13,3042 1,9182 6,5125 6,7917 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 132 JOKO SANTOSO L2A 001 086 Tabel 4.31 Perhitungan Hujan Efektif Periode Ulang 100 th t jam R mm I mmjam I f mm Re mmjam 1 368,2137 127,6526 15,9598 10,4901 117,1624 2 368,2137 80,4161 10,0541 9,4543 70,9618 3 368,2137 61,3690 7,6727 8,8964 52,4726 4 368,2137 50,6590 6,3337 8,5206 42,1383 5 368,2137 43,6566 5,4582 8,2402 35,4164 6 368,2137 38,6600 4,8335 8,0179 30,6421 7 368,2137 34,8844 4,3614 7,8346 27,0498 8 368,2137 31,9131 3,9900 7,6792 24,2339 9 368,2137 29,5031 3,6886 7,5448 21,9584 10 368,2137 27,5019 3,4384 7,4265 20,0755 11 368,2137 25,8088 3,2268 7,3210 18,4878 12 368,2137 24,3543 3,0449 7,2261 17,1282 13 368,2137 23,0888 2,8867 7,1399 15,9489 14 368,2137 21,9758 2,7475 7,0609 14,9148 15 368,2137 20,9879 2,6240 6,9882 13,9996 16 368,2137 20,1040 2,5135 6,9209 13,1831 17 368,2137 19,3077 2,4140 6,8583 12,4494 18 368,2137 18,5858 2,3237 6,7997 11,7861 19 368,2137 17,9278 2,2414 6,7448 11,1830 20 368,2137 17,3251 2,1661 6,6931 10,6320 21 368,2137 16,7707 2,0968 6,6443 10,1264 22 368,2137 16,2585 2,0327 6,5981 9,6604 23 368,2137 15,7838 1,9734 6,5542 9,2295 24 368,2137 15,3422 1,9182 6,5125 8,8297 Perencanaan Dam dan Spillway Yang Dilengkapi PLTMH di Kampus Tembalang HILALUDIN L2A 001 078 133 JOKO SANTOSO L2A 001 086

j. Hidrograf Satuan Sintetik Gama-I