Assessing the Influence of Land-Use Changes on Water Quality Using Remote Sensing and GIS: A Study in Cirata Reservoir, Indonesia

Abstract

Environmental Changes in a round of reservoirs have dramatic influences on the sedimentation and deterioration of water quality. A significant land-use change in the Cibalagung sub-watershed has an impact on the water quality in the Cirata reservoir. In this study, we used remote sensing and GIS to investigate the influence of land-use changes on water quality in the Cibalagung sub-watershed, Cirata reservoir in 2004–2014. We use Knowledge-Based Classification (KBC) and Fuzzy Logic (FL) to determine the land-use classification. The influence of land-use changes on Total Suspended Solids (TSS), as the main parameter of water quality, was determined by path analysis. This study indicated that 92.50 % of land-use changes through increasing mixed plantations, cropland, settlements, and grassland could affect the TSS content in the reservoir. Decreasing vegetated land had a simultaneous effect to reduce the water quality.