STUDY GROUNDWATER RECHARGE POTENTIAL ON CITARUM HULU WATERSHED
The population increase in the Citarum Hulu watershed can cause an increase of water need and land use cover, where the urban and industry area are widespread. These widening area cause less recharge area, but the other hand it became new sources of groundwater resource such as water mains leakage,...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/20250 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The population increase in the Citarum Hulu watershed can cause an increase of water need and land use cover, where the urban and industry area are widespread. These widening area cause less recharge area, but the other hand it became new sources of groundwater resource such as water mains leakage, wastewater and septic tank leakage and irrigation from agriculture area. <br />
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Earlier research stated that the focused research area are divided into three aquifer which are upper aquifer, middle aquifer and lower aquifer. The potential recharge are water that could recharge into the unconfined aquifer/upper aquifer mainly from the urban area which is local recharge (Lerner et all, 1990), while potential recharge from precipitation have regional term but this regional groundwater flow occurred in the unconfined aquifer (IWACO & WASECO, 1990). <br />
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The research resulting that groundwater potential recharge from precipitation are 355 mm/yr or about 18% from the rainfall while potential recharge or urban area are 71 mm/yr thus overall potential recharge are 426 mm/yr or ± 737 million m3/yr. Recorded groundwater exploitation are ± 511 milion m3/yr thus there is surplus in the unconfined aquifer zone, but the fact is that groundwater drawdown already occurred. The drawdown mainly caused by an unauthorized groundwater exploitation. |
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