ANALISIS PERUBAHAN TINGKAT KERAWANAN BANJIR DI KECAMATAN SERPONG UTARA TAHUN 2017 DAN 2022

Abstract

The rapid development of South Tangerang City has led to a growing population and increased building density, which has reduced the water catchment area. This has led to increasing flooding problems, one of which is in North Serpong Sub-district. The incidence of flooding in North Serpong Sub-district continues to increase from 2017 to 2022 due to the overflow of Angke River. This research aims to compare the level of flood vulnerability in 2017 and 2022 in North Serpong Sub-district, and map the results of the calculation of the level of flood vulnerability using several parameters, namely rainfall, slope, soil type, land use, and river buffer. This research uses the Weighted Overlay and Composite Mapping Analysis (CMA) methods using ArcGIS 10.8 software to determine the weight of each parameter which is then multiplied by a score. The total calculation of weights and scores is divided into 3 classes of flood vulnerability levels (very vulnerable, vulnerable, and not vulnerable). The results of this study found that the level of flood vulnerability in Serpong Utara Sub-district has increased from 2017 to 2022. The largest increase occurred in the vulnerable class of 223.85 Ha or 12.5% from 2017. The increase also occurred in the highly vulnerable class, which is 59.69 Ha or 3.3% from 2017.