Change Detection of Land Cover at Flood Potential Areas using Multitemporal Image Data in East Jakarta City

Abstract

East Jakarta City is one of 6 cities / regencies in the. The city of East Jakarta as one of the cities in the Special Capital Province of Jakarta has a significant growing population. Changing of land cover might result on flood disaster in related with the growth of population. Main purpose of the study is to determine variable that influence the flood height of an area with imagery data in the period of four decades-1990, 2000, 2020, and 2020. The first step uses land cover classification analysis to identify land cover in the City of East Jakarta. Then, land use analysis uses change detection methods to determine the changes that occur in each land class. The second step of spatial analysis with the ordinary least square method and geographical weighted regression covering 6 variables-flood height, rainfall, contour, river water level, land cover and population density, in order to find out the variables that influence flooding in the research area. The land cover in the East Jakarta City in the period of 1990-2020 had a significant changed, especially for increasing of built-up area. Since total of the area is fixed, the wider built-up area means the lessen areas for other land uses such as vegetation, water body and un-built-up areas. Then, variables that affect flooding in each district are differ for each district. For district of Cakung, Makasar, Kramat Jati, Pulo Gadung is related to contour of the region. Then, at district of Ciracas, Cipayung, Duren Sawit are due to area of land developed. Next, at Jatinegara and Pasar Rebo Districts are about population density, and at Matraman District is rainfall variable. Understanding cause of the flood might give a better approach on propose a flood management disaster strategy that it might conduct in the future reseach.