Assessment of spatial changes of LULC dynamics, using multi temporal landsat data (case study: Lesti Sub Watershed, Malang Regency, Indonesia)

Abstract

The research background is to present certain important observations about land change as one of the basis for decision making for water resources management in the sub-urban environment, taking into account field data and classification of satellite imagery to understand natural spatial change patterns. The Lesti sub-watershed, an area upstream of the Brantas River related to multi-functional activities, continues to develop in terms of infrastructure management, especially the river water discharge that enters the Sengguruh Reservoir which causes increased pressure on water and human needs for housing. The method is utilizing Landsat satellite imagery for the last 20 years is used to obtain an analysis of land use/land cover (called: LULC) changes to see the rate of change over the last 20 years. The land use classes used are agricultural land, surface vegetation, built-up areas, open land, and water bodies. Landsat satellite imagery data are classified and used to obtain LULC analysis in the area, to estimate and understand the rate of change over the last 20 years. The results showed that for 20 years, vegetation and open land experienced a considerable decline, while the value of built-up land increased from 0.79% to 13.26%.