Evaluasi Efektivitas Pembaharuan Sistem Saluran Drainase Terhadap Tinggi Muka Banjir di Kelurahan Martubung

Abstract

Floods are water that overflows due to high rainfall. One way to overcome floods is to build good drainage channels. However, drainage often experiences sedimentation problems, garbage accumulates so that drainage channels cannot accommodate water properly. The drainage problem can be overcome by updating the drainage system in the area. This study focuses on the effectiveness of drainage channels after renewal in the Martubung area of Medan, North Sumatra. The purpose of this study is to determine the effectiveness and capacity of existing drainage channels and to find out what causes flooding in the area. This study is analytical, with the data obtained namely rainfall station data for hydrological analysis and drainage size data for hydraulic analysis. The results of the analysis showed that in the Martubung area there was a flood caused by the accumulation of garbage and sediment so that the drainage channel was renewed with the capacity of the drainage system channel that had been renewed, which was declared effective at 70,07% in handling the flood level in the Martubung area. This drainage system renewal reduces the flooding that occurs. Before planning the channel, the discharge that will enter the drainage channel should be taken into account. Pay attention to the existence of existing drainage channels so that they are not clogged with garbage. The importance of maintaining the condition of the channel so as not to throw garbage and regularly cleaning the channel so that sediment does not accumulate.