The influence of groundwater use on land subsidence in Bandung City

Abstract

Bandung is a developing city with a high need for groundwater for various needs. Many research studies say groundwater usage is one of the causes of land subsidence but the results mostly just take one side either land subsidence or groundwater. If land subsidence can be estimated through the value of groundwater use, then this can help prevent calamity. Therefore, a correlation between groundwater usage and land subsidence is sought to see how much groundwater usage influences land subsidence. Land subsidence research was conducted using the Differential Interferometric Synthetic Aperture Radar (DInSAR) system with the SNAP application. The data used is the use of groundwater from 2017 to 2022 and Sentinel 1-A imagery of six images for annual research and sixty-six images for monthly research. The yield of the average settlement each year from January 2017 to May 2022 is approximately 5cm with a linear regression coefficient of determination of 21% while the groundwater use regression with subsidence per month is not linear but wavy. From this conclusion, another research can be developed regarding other factors causing land subsidence besides the factor of groundwater use which can then be seen how much influence these factors have on land subsidence that occurs.