Drainage Systems for Flood Control in Medan Selayang, Indonesia, Based on Rainfall Intensity and Drainage Evaluation

摘要

One of the causes of drainage conditions in some places does not work anymore is due to the smaller capacity of the existing discharge, lack of care or the drainage systems and disposal that is no longer compatible with the environment, thus resulting in flooded every year. This study aim to investigate the intensity of the rain and drainage capacity in the city of Medan, North Sumatra, especially Medan Selayang area, to evaluate the regulation of drainage system in Medan city in order to reduce excess water. The evaluation of drainage in the analysis through the Rasional method. The results shows that the peak of flood discharge obtained in the catchment area of the drainage network system for 10 year return period is 29.697 m~(3)/s.