Pemodelan Ketinggian Genangan Banjir Rob dan Kerentanan Sosial Menggunakan Digital Elevation Model (DEM) WIlayah Pesisir Jakarta Utara

Abstract

Land subsidence that occurs in the Jakarta area is one of the causes of tidal flood in the coastal areas of North Jakarta. Tidal floods are natural events / phenomena where sea water enters the land when the sea level is high tide. The purpose of this study was (1) to analyze tidal flood modeling through scenarios of sea water inundation in the coastal area of North Jakarta and (2) to analyze the value of social vulnerability to tidal flooding in coastal areas of North Jakarta. The method used in this study is spatial modeling of tidal flood using DEM data that is processed through iterative techniques. Modeling was carried out with 3 sea tide scenarios, namely 50 cm, 100 cm and 150 cm. In addition, a quantitative analysis was conducted to obtain social vulnerability maps through several social parameters. The result of the tidal flood modeling field surveys through some sample points to obtain information related to the tidal flood through the interview stage with the local community.Based on the modeling results, the dominant spatial distribution of tidal floods in North Jakarta is located in Penjaringan Sub-District and then propagates to Pademangan Sub-district. This is due to the low elevation in the area so that the access to seawater propagates deeper into the south, especially in the 150 cm sea tide scenario with the affected area 3388,671 Ha.. Scoring results of the parameters of social vulnerability, known as Pejagalan Village, Penjaringan Village, Pademangan Barat Village, and Kalibaru Village have the highest levels of social vulnerability