Slope Stabilization based on Land use Methods in Ambang Sub River Basin

Abstract

Upper river basin has an important function as the conservation area. Any problems occuring in the upper river basin will decrease an overall bearing capacity of the river basin. Soil as a biophysical factor of river basin is affected by the land use, especially in its physical properties, including slope that consists by soil layer. Brantas upper river basin has specific problem, especially in the level of erosion and sedimentation. The determination of suitable slope stabilization methods is important to reduce the quantity of erosion, to decrease risk of land slide and to maintain human activities above and under the slope. The study aims to provide lists on slope stabilization method based on quick assessment of slope conditions and land use in Ambang sub-river basin. The study is conducted on Ambang sub-river basin, part of Brantas upper river basin, Indonesia. The stabilization methods used in this study were the common methods implemented in Indonesia. The analysis was conducted to obtain the suitable slope stabilization methods based on the land use. The study has resulted quick assessment list of slope stabilization methods suitable for each specific land use in the Ambang sub-river basin. It showed that agriculture and settlements significantly affected the determination of slope stabilization methods. It also resulted that combination between stabilization methods could provide better solution in stabilizing slope.