45
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.
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Days
P re
c ip
it a
tio n
m m
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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
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70
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90 100 110
2000 1996
Depok
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110 1996
2000
Manggarai
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70 80
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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.
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45
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Days w
a te
r le v
e l
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measurement model
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v e
l c
m
measurement model
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Days W
a te
r l evel
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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.
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a te
r le v
e l
c m
measurement model
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90
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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
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l c m
measurement model
B
C
49
4.1.7 Model Structure