An Integrated Approach For The Banger Polder Development, Semarang

Abstract

The Banger area is named after the main channel in the area: the Kali Banger. The area are located in low land areas near the coastal, and are expossed to be flood/inundationcaused by sea water level, poor drainage and escalated with land subsidence. The polder concept has been identified as a suitable solution for the problems. The Polder system requires an integrated approach in some technical aspects and economic prespective, such as defining the safety level, the water level to be controlled. So the size of retention basin and pump capacity can be determined, since all these aspects are related to each other. And these will influence to the O&M costs and reduction of damage. Based on the analysis (Net Present Value) of (additional) investment costs, O&M costs and reduction of damage, the optimal safety level has been determined on T10.