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Effects of Land-Cover Changes and Other Remediations on Hydrology of Xinjiang River Sub-Watershed

Journal of Environmental Science and Engineering(B) 2013年第7期2卷 416-425页

作者： Ambika Khadka Chun Fu Maungmoe Myint Chadwick Oliver James Saiers School of Forestry and Environmental Studies Yale University New Haven 06511 CT USA Research Center of Central China Economic Development Nanchang University Nanchang 330031 China Mapping and Natural Resources Information Integration Vaud LaBrussus 1348 Switzerland

To determine whether reforestation efforts.in the denuded hills have significant impacts on hydrology in the Xinjiang River watershed, the authors examined eight land-cover scenarios to compare hydrologic responses and to provide a conceptual basis for restoration practices. The authors analyzed a 17-year time period using remote sensing to develop land-cover classification for the watershed. Climate, soil and terrain data for the watershed were used as input in the SWAT （soil and water analysis tool） to quantify and compare the impacts on hydrologic processes. The model was calibrated to a two-year record of stream discharge measurements. The results show significant increase in forest-cover on hills （13%）. However, the hydrological response is not very significant considering the changes in forest-cover, the surface runoff and percolation ratios only changed by 2% and 1% over time. Installment of earthen irrigation ponds in the outlets of sub-basin with maximum runoff had provided the most significant hydrologic improvements and could provide irrigation water to increase crop yield on remaining cropland. The study will provide information to the local government to aid decision-making in sustainable reforestation programs resulting in better hydrologic functioning for sustainable water resource management.

关键词： SWAT (soil and water analysis tool) hydrologic responses surface runoff percolation reforestation efforts.

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