Spatial Analysis of Land Subsidence and Flood Pattern Based on DInSAR Method in Sentinel Sar Imagery and Weighting Method in Geo-Hazard Parameters Combination in North Jakarta Region

2nd Geoplanning - International Conference on Geomatics and Planning

Prasetyo, Y.^1 ; Yuwono, B.D.^2 ; Ramadhanis, Z.^1

Remote Sensing and Photogrammetry Lab, Geodesy Engineering Dept, Diponegoro University, Indonesia^1

Geodesy Lab, Geodesy Engineering Dept, Diponegoro University, Indonesia^2

关键词: D-inSAR;    Differential interferometric synthetic aperture radars;    Geo hazards;    Jakarta;    Land subsidence;    Research methodologies;    Satellite image datas;    Spatial correlation analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/123/1/012009/pdf
DOI  :  10.1088/1755-1315/123/1/012009

来源: IOP

【 摘 要 】

The reclamation program carried out in most cities in North Jakarta is directly adjacent to the Jakarta Bay. Beside this program, the density of population and development center in North Jakarta office has increased the need for underground water excessively. As a result of these things, land subsidence in North Jakarta area is relatively high and so intense. The research methodology was developed based on the method of remote sensing and geographic information systems, expected to describe the spatial correlation between the land subsidence and flood phenomenon in North Jakarta. The DInSAR (Differential Interferometric Synthetic Aperture Radar) method with satellite image data Radar (SAR Sentinel 1A) for the years 2015 to 2016 acquisitions was used in this research. It is intended to obtain a pattern of land subsidence in North Jakarta and then combined with flood patterns. For the preparation of flood threat zoning pattern, this research has been modeling in spatial technique based on a weighted parameter of rainfall, elevation, flood zones and land use. In the final result, we have obtained a flood hazard zonation models then do the overlap against DInSAR processing results. As a result of the research, Geo-hazard modelling has a variety results as: 81% of flood threat zones consist of rural area, 12% consists of un-built areas and 7% consists of water areas. Furthermore, the correlation of land subsidence to flood risk zone is divided into three levels of suitability with 74% in high class, 22% in medium class and 4% in low class. For the result of spatial correlation area between land subsidence and flood risk zone are 77% detected in rural area, 17% detected in un-built area and 6% detected in a water area. Whereas the research product is the geo-hazard maps in North Jakarta as the basis of the spatial correlation analysis between the land subsidence and flooding phenomena.double point.