Land Use Change Effect on Erosion Prediction Results using SWAT Model in Lisu Watershed, South Sulawesi Try Ardiansah1,a), Mahmud Achmad2, Roland A. Barkey3
1Regional Planning and Development Study Program, Hasanuddin University Graduate School
2Faculty of Agriculture, Hasanuddin University
3Faculty of Forestry, Hasanuddin University
a) tryardiansah[at]gmail.com
Abstract
Lisu watershed in South Sulawesi Province is included in the second priority watershed with the carrying capacity recovery. To minimize the adverse effect of soil erosion on human society and infrastructure, concerted efforts are required for planning and implementation of soil and water conservation practices at a sub-watershed scale. Using the SWAT model, the effect of land use changes on erosion rates in the Lisu watershed will be studied. The land management scenario used in this study is a regional spatial plan scenario (RTRW) to simulate hydrological condition of Lisu watershed by the regional planning of Barru Regency government. The study indicates that SWAT model had a good performance to simulate flow discharge with R2 and NSE values in calibration process of 0.72 and 0.5 respectively. The results of the study showed that spatial plan scenarios were able to reduce soil loss severity classes very high 97.66 % from the actual scenario.
