Evaluasi Pembuatan Sudetan sebagai Metode Pengendalian Genangan Banjir di Jalan Bromo Kecamatan Medan Denai

Abstract

Rainfall is high enough and is not optimal Sudetan in covering the rainwater in the Road Bromo Prefecture of the Denai Field was the cause of the occurrence of flood problems. Sudetan is an artificial channel or carrier channel to control or reduce the impact of flooding by diverting the flood water stream, so that flood discharge on the old stream will be reduced. The problem was solved by the flooding of the sulang saling on the road of Bromo, which caused a flood. In the event of this problem, the flood control evaluation will be carried out using the sudetan method, which rehabilitation of sudetan that exists on the Bromo Street at the Denai Field to function optimally. This study took 3 (three) respondents who were the head of the neighborhood at the Bromo Street of Medan Denai. The collection of data in this study is primary data including flow pattern data, channel dimension data and questionnaire, then secondary data is maximum daily rainfall data from two stations of the period 2012-2021 BMKG Sampali, and Bandar Klippa. From the analysis of the flood discharge of the 10-year re-period plan with the rational method obtained Qbsudetan = 6 m3/second and Qbsulang saling = 89,87 m3/second then for Qksudetan = 19,67 m3/second . By comparison between the peak flood discharge and the existing capacity of the sudetan, it is possible to accommodate sulang saling of 13,67m3/second or 15.21%. Based on the above calculations, it can be found that the sudeten can divide a portion of the sulang saling. But under the conditions on the ground, the sudetan is not functioning optimally so it needs rehabilitation on the sudeten.