Water level Model Calibration

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4.1.5 Water level

Water level compared and precipitation data are shown in Figure 12. From the Figure12, it can be indicated that there are high correlation between water level and precipitation. 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 110 120 130 140 Days P re c ip it a tio n m m 10 20 30 40 50 60 70 W a te r Lev el c m Precipitation Water Level Figure 13. Water Level in Manggarai and Area Precipitation in Ciliwung Watershed Water level in three location named Katulampa, Depok and Manggarai in year 1996 and 2000 are shown in Figure14. 46 Katulampa 10 20 30 40 50 60 70 10 20 30 40 50 60 70 80 90 100 110 2000 1996 Depok 5 10 15 20 25 30 35 40 45 10 20 30 40 50 60 70 80 90 100 110 1996 2000 Manggarai 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 90 100 110 120 130 140 2000 1996 Figure14. Measured water level in 1996 and 2000 From Figure 14, water level in each location have changed over the years 1996 to 2000. 47

4.1.6 Model Calibration

The model was tested by comparing the model outputs with the measurement data in year 1996. Model calibration result can be seen as Figure 14. 5 10 15 20 25 30 35 40 45 20 40 60 80 100 Days w a te r le v e l c m measurement model 5 10 15 20 25 30 35 20 40 60 80 100 Days w a te r l e v e l c m measurement model 10 20 30 40 50 60 70 10 20 30 40 50 60 70 80 90 100 110 120 130 140 Days W a te r l evel c m measurement model Figure 15 The simulated and observed water level in location, year : A Katulampa, 1996 ; B Depok, 1996; C Manggarai, 1996. C B A 48 Validation process is done by comparing calibrated model outputs with field data. Field data used for model validation are water level in three location Katulampa, Depok and Manggarai in year 2000. The result of model validation shown in Figure 16. 10 20 30 40 50 60 70 20 40 60 80 100 Days w a te r le v e l c m measurement model 10 20 30 40 50 60 70 80 90 10 20 30 40 50 60 70 80 90 100 110 120 130 140 Days W a te r le v e l c m measurement model Figure 16 The simulated water level in location: A Katulampa B Depok C Manggarai A 10 20 30 40 50 60 20 40 60 80 100 Days w a te r l e v e l c m measurement model B C 49

4.1.7 Model Structure