Assessment of Land Use Change in Bedadung Jember Watershed Using Landsat-8 Satellite Imagery

Abstract

Increased population growth will impact on changes in land use for human settlements and other living needs. It is caused to land use change that negatively impacts the environment if it is not managed properly. Therefore, the information regarding to land use map is essentially needed. This research aims to asses land use change in Bedadung Jember watershed using a remote sensing technology as Bedadung watershed is one of the largest watersheds through the settlement areas of Jember regency. Remote sensing technology is widely used to provide any information such as land use changes without having an immediate monitoring in site. Therefore, it can be used to monitor land use changes in an area regularly. Landsat-8 has 30x30 m resolution is one of remote sensing technologies which is suitable for this research. The method of classifying land use change used supervised classification with Normalized Difference Vegetation Index (NDVI) analysis approach in Geographic Information System (GIS). The results showed that within 16 years from 2001-2017, Bedadung Jember watershed had increased its settlement areas to 36,79 km2 or 2,66%, forest areas are decreased to 47,98 km2 or 3,47%, paddy field areas are decreased to 122,33 km2 or 8,84%, open areas are increased to 3,86 km2 or 0,28%, shrub areas are increased to 37,68 km2 or 2,72% and plantation areas are increased to 90,82 km2 or 6,57%. Simulation results with daily rainfall plans on land use in 2001 and 2017 show that the peak discharge generated in 2001 was 68.8 m3/s, while in 2017, it was 103.9 m3/s. Peak discharge in 2017 is higher than in 2001. This simulation shows that the condition of land use in 2001 is better than in 2017.