Establishment of Agrotechnological Model Based on the Analysis of Change Impacts on Land Use the Wanggu Watershed in Southeast Sulawesi, Indonesia
La Ode Alwi

Abstract
Establishment of Agro technological Model Based on the Analysis of Change Impacts on Land Use the Wanggu Watershed in Southeast Sulawesi, Indonesia. Land degradation and hydrological conditions of the Wanggu watershed were assessed based on changes in land use, soil physics, erosion and surface runoff coefficient and river discharge using survey methods and experimental plots. Data of land biophysics included climate data, topography, soil types, and land use obtained from the results of various studies. Farmers' income was calculated based on total production, revenues, and total cost spent by farmers. The research was conducted from January 2015toJune 2015. The aims of the research were (1) to assess the impacts of changes in land use in the Wanggu watershed in terms of erosion, land degradation, discharge ratio of Qmax/Qmin, and farmers’ income from farming; (2) to analyze land use and models of agrotechnology that could not only improve soil infiltration capacity and water availability, but also reduce discharge ratio (Qmax/Qmin) and erosion rate and land degradation; and (3) to formulate a model of land use planning and agrotechnology in sustainable watershed management. The study result showed that the changes in land use that were not in accordance with land capability had led to land degradation, generally on dry fields, shrubs, and settlements with erosion> Etol, respectively 38.0>16.7; 20.3> 11.6 and 15.9> 15.6 tons/ha/yr) on a slope of > 8%.In the meantime, the increase in discharge ratio (Qmax/Qmin> 30), land productivity and farmers’ income was low (dry land agriculture Rp 21,500,000 ha-1yr-1, and mixed farm/agroforestry Rp 31.5 million ha-1yr-1
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