KAJIAN KAPASITAS SISTEM SALURAN DRAINASE PADA KELURAHAN KELUTAN KECAMATAN TRENGGALEK

Studi Kasus : Kapasitas Sistem Saluran Drainase Pada Kelurahan Kelutan Kecamatan Trenggalek

Abstract

Floods and inundation are common occurrences in Kelutan village, Trenggalek sub-district. The factor that causes flooding and inundation is the difference in the slope of the topographical conditions in the Kelutan village. Kelutan Village is a lower part, close to the river, and also the lack of adequate drainage channel capacity so that it is not able to accommodate the rainwater that falls. To overcome these problems, it is necessary to arrange and improve the efficiency of drainage channels in the Kelutan village area. The method used is to analyze the capacity of the existing channel by comparing the value of the flood discharge and the value of the capacity of each channel. The flood discharge value was obtained from rainfall data, flow coefficient, rainfall intensity, and catchment area. The return periods used are 5 years, 10 years, 20 years, 50 years, and 100 years. The results of the analysis obtained as many as 31 channels, which were able to accommodate the design flood discharge as many as 5 channels, and which were unable to accommodate the design discharge as many as 26 channels. Thus providing an alternative planning by re-designing the drainage channel with the trial and error method. Another alternative is to normalize the channel.