Contaminated groundwater comes from an industrial plant which is located in the vicinity of a large river. Groundwater is originated from the alluvial and unconfined aquifer. The groundwater is bounded by a no-flow boundary and has a hydraulic connection with the river. For that reason, the contaminated area have to be excavated into a certain depth before the rise of water table during the high flow season, the river. Dewatering scheme is designing to keep the excavation zone still below the water table. Five wells are installed to monitor groundwater water table and contamination. A set of configuration is made for the locations od the pumping wells, the pumping rates and estimated period of time to compute the drawdown within the excavation zone. Principle of superposition, Theis's equation, computer programming using FORTRAN and "trial and error" of pumping rates, are used in this model to compute groundwater water table. Based on the "trial and error" op pumping rates, the number of 3,000,000 gallons per day is fair enough to maintain the drawdown under the water table and to keep the drawdown below the excavation zone.
Sofian Saidin, Yoyo Tachya; UIKA Bogor
Sofian Saidin, Yoyo Tachya; UIKA Bogor
