Analysis of determining the location of potential flood evacuation shelter in Butuh District, Purworejo Regency

Abstract

Map of flood events in Purworejo Regency, on January 16 2019 there were 7 flood-affected subdistricts, namely Butuh District, Bayan District, Banyuurip District, Pituruh District, Purwodadi District, Grabag District, and Ngombol District. Butuh District is the area most affected by flooding in Purworejo Regency. There are 9 villages out of 41 villages in Butuh District that are not affected. The flooding in Butuh District was caused by the overflow of several rivers, such as tributaries of the Wawar River, Gebang Besar River, and Kedunggupit River. This study aims to determine the distribution of flood vulnerability and potential shelter flood disaster evacuation in Butuh District, Purworejo Regency. The water level is estimated to reach 1 meter and makes all access closed. According to the Commander of Kodim 0708 Purworejo, there were still some residents who did not want to be taken to a safe location and with a good approach, the residents were eventually evacuated. Losses caused by floods in Butuh District were only damage to household appliances and there were no casualties. Another problem caused by the flooding in Butuh District is itching of the skin. There must be efforts to prevent floods in the Butuh District so that they do not happen again and cause the same losses. Flood disaster mitigation is an action that must be taken. Interpolation IDW (Inverse Distance Weight) and scoring to get flood hazard results and digitization to get evacuation routes. The research results show that the area is prone to flooding. Interviews showed that the southern region experienced the worst flooding because the further south you go, the lower the slope and several villages in the southern region are affected by the discharge of water into rivers from other areas. Meanwhile, secondary data shows that the northeast to south and northwest regions of Butuh District experienced the worst flooding due to high rainfall and a soil profile that was saturated with water so that several areas that had flat and sloping slopes were affected by flooding. Interviews and potential secondary evacuation shelters obtained 18 evacuation shelters and 37 evacuation shelters.