Analisis Debit Banjir Rencana Sungai Deli di Kecamatan Medan Johor

Abstract

Flooding is a problem that is very common in Indonesia. Flooding can also occur because the river is unable to accommodate the volume of water available when it rains heavily enough. Many factors affect the performance of one river such as natural factors such as rainfall, erosion and sedimentation as well as human factors such as indiscriminate settlement and littering in the river. This study aims to analyze the magnitude of the planned flood discharge that occurred in Deli River Kec. Medan Johor as a first step in efforts to overcome floods, so this research focuses on the analysis of discharge. The analytical method used is the Gumbel, Normal, Log Normal and Pearson III Log probability distribution methods to analyze the planned rainfall then tested using the Smirnov-Kolmogorof method. The analytical method to get the plan discharge using the rational method. The results of the analysis found that the high rainfall plan affects the flood discharge so that the rainfall plan for the Gumbel probability distribution method is used. So that the maximum design flow obtained is 361,04 m3/sec.