ANALISIS TINGKAT KERAWANAN BANJIR MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS DI DAS BAMBAPUN KECAMATAN DONDO KABUPATEN TOLI-TOLI

Abstract

Flood is a common problem that often occurs in Indonesia, even almost all parts of Indonesia have experienced floods. Natural disasters such as floods when viewed from year to year continue to increase, the factors can be caused by nature or from humans themselves. The Bamba watershed in recent years has experienced a decline in function due to land use, whether it is used as agricultural land, plantations, or open land. The purpose of this study is to determine the level of flood susceptibility in the Bambapun watershed, Dondo District, Toli-toli Regency using a Geographic Information System. The research was carried out for 3 months, from October to December 2021 with the Geographic Information System method, namely Overlay (Overlay) and Scoring from several data (flood determining parameters) to determine the level of flood vulnerability in the Bambapun Watershed. The results of the analysis that has been carried out in the Bambapun watershed area, Dondo District, it can be seen that the area in the Bambapun watershed area has four levels of flood vulnerability, namely the slightly flood-prone area of 3,385.57 hectares or 73% located in the upstream of the Bambapun watershed, the area is quite prone to flooding. 745.24 Ha or 16% of floods are in the middle of the watershed, the flood-prone area is 345.73 Ha or 7% is in the middle and downstream of the watershed, and the very flood-prone area is 187.82 Ha or 4% at downstream of the Bambapun watershed..