Analisis daerah genangan banjir rob (pasang) di pesisir utara Jakarta menggunakan data citra satelit SPOT dan ALOS

Abstract

Most of the land area of the northern coast of Jakarta is a result of reclamation of mangrove forest area, thus changing the shoreline and mangrove buffer function vanish. Effect of shoreline phenomena such as tidal flood rob), it makes some parts of the region including the northern coast of Jakarta which has a coastline along the 32 km flood affected by tidal flood (rob). Floods tidal (rob) occur when sea water runoff to the mainland every time the high tides that inundate the region is lower than the average sea level. Effect of population makes land a solid building, make change in land cover wet into dry land by the construction of wet areas resulting from land use changes. Through the results of land use change, coastlines changes and inundation prediction using data of sea level rise can be explained tidal flood (rob). SPOT (2003) and ALOS (2008) satellite imagery can explain land cover changes over the past five years, and the value of sea level rise per year to predict inundation within the next ten years. Because of changes in coastal land, coastline changes that lead to the addition of soil (accretion) and a decrease in surface (abrasion). Addition of soil (accretion) explains the more advanced the shoreline that have an impact on the pool of sea water at high tide when the maximum occurs. Based on field surveys carried out, explaining that changes in the research area of coastal land cause tidal flood (rob). Inundation predictions using DEM-GDEM data 30 m, the level of the value of the coastline and the sea rose to explain the occurrence of inundation in coastal areas north of Jakarta in 2019. The results obtained from several methods to explain the inundation occurred in the same area, so that could explain the relevance of changes in land and sea level rise which resulted in tidal flood (rob) event.