Integrated Urban Drainage Management for Flood Inundation Controlling in Sidokare Area at Sidoarjo Regency

Abstract

Flood and inundation had become a serious problem in Sidoarjo Regency annually. This study aimed to apply integrated urban drainage management for flood inundation controlling at Sidokare Region in Sidoarjo Regency. This integrated drainage management consisted of retarding pond, drainage channel redesign, and pump utilization. The study region was divided into Sidokare Pump station, Sepande, and Diponegoro Street catchment area. Rainfall intensity during historical floods was analysed using Mononobe formula and Log Pearson Type III method was used to analyze design rainfall. From the result of the analysis, it was found that the historical floods in study region caused by rainfall with return period of 1.01 years, with rainfall intensity of 17.55 mm/hour. It was also found that by implementing this integrated urban drainage management at Sidokare Region, flood could be reduced up to 100%. For Sidokare Pump Station catchment area, the inundation management was conducted by using combination of storage pool, existing drainage channel, and the existing flood pump. For Sepande catchment area, it was managed to use the combination of storage pool and the existing drainage channel. Meanwhile, Diponegoro Street catchment area was solved by utilizing new flood pump combining with new tertiary channel and existing drainage channel.