STUDI EVALUASI JARINGAN DRAINASE JALAN RAYA SIMO DESASUNGELEBAK KECAMATAN KARANGGENENG, KABUPATENLAMONGAN

Abstract

ABSTRACT

The problem of flooding which occurs almost every year during the rainy season is a concern that must beaddressed immediately. The large number of buildings erected on former rice fields and fields will theoreticallyincrease the drainage coefficient which will ultimately increase the surface runoff discharge that must bechanneled through drainage channels. The aim of this research is to determine the design flood discharge, thenumber of channels that do not meet the design flood discharge and the dimensions of the drainage channelsrequired on Jl. Simo, Sungelebak Village, District Geneng Reef Lamongan Regency based on analysis ArcGIS.This research was carried out using a quantitative descriptive method with stages of collecting rainfall data,topographic and land cover maps, as well as existing drainage data. Next, an analysis of the design rainfall,analysis of the drainage coefficient, analysis of the design flood discharge, as well as analysis of the storagecapacity of the existing drainage channels are carried out. The results of this research are the design flooddischarge that occurred on Jalan Simo, Sungelebak Village, namely in the right H2-H1 channel of 2.035 m3/secand in the left H2-H1 of 0.569 m3/sec. There are fifteen channels that do not meet the planned flood discharge sochannel redesign is needed. The channel redesign with the largest dimensions is the right H2-H1 channel withdimensionsof0.7x1.4mandthe leftH2-H1 channel withdimensionsof0.6 x0.6m.

Keywords:ArcGIS,Flood,SungelebakVillage,Drainage,SimoStreet