Evaluation of Pumping Operation System Under Daily Basis Rainfall

Abstract

Polder system has been introduced in Indonesia as one of the best solutions for an area located below sea water level to control the flood. The polder itself is a combination system between retention pond and pumping system. Based on the regulation, drainage system should be designed based on certain return period so as the pumping system. A study has been conducted by Wulandari (2015), it is mentioned that the pumping system should be designed under time-series data not just the return period rainfall data. In this study, two scenarios of pumping operations system are being implemented at daily rainfall 2005, where the scenario 1 is a pumping system designed based on a certain return period and scenario 2 is a pumping system designed based on monthly maximum daily rainfall (2005-2014). In general scenario 2 gives the best result compare to the scenario 1. Although scenario 2 gives best result, it does not mean return period rainfall is not take into account. Luckly, 25 years return period rainfall occured during 2005-2014, hence, the operation scenario 2 still could handle heavy rainfall.