Jakarta Groundwater Basin Recharge-Discharge Boundary Area Map: A Preliminary Study

Abstract

The most important component in groundwater basin are recharge and discharge area. The direction of recharge component is downward while discharge is upward. To discover local recharge and discharge boundary area of the Jakarta groundwater basin, this experimental research is using many cross sections and some hydraulic parameters of many studies that has been conducted before, then simulated it in finite element program SEEP2D (GMS) and finally validated it with bore log and monitoring wells. Ten cross sections selected from 3 studies based on head contour, stratigraphy and groundwater river interaction to be simulated in finite element method SEEP2D (GMS) then the result is validated. Since the result of the investigation is not finished yet, this paper wants to demonstrate the methodology that being conducted in the research with the horizontal map hypothesis. The map hypothesis is evident compare to the real situation of Jakarta groundwater basin today and it is approved that the method that is being used in this research is eligible and appropriate to find the boundary area of recharge and discharge. In the future this recharge and discharge boundary area horizontal map of Jakarta groundwater basin result will encourage many practical solutions in supporting Jakarta groundwater basin management.