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Investigation into the Impacts of Land-Use Change on Runoff Generation Characteristics in the Upper Huaihe River Basin, China
Land-use change has significant impacts on hydrologic processes at the watershed level; thus, quantitative assessment on the impacts of land-use change is vital for basin environment protection and water resources sustainable development. Owing largely to computer and geographical information system (GIS) technology improvements, the distributed hydrological models, which allow describing the temporal variability and spatial distribution of water-balance components, offer an effective approach to quantify the land-use change effects on watershed water quantity. In this study, a soil and water assessment tool model was used to simulate land-use change effects on water quantity in the upper Huaihe River basin in China above the Xixian hydrological controlling station with a catchment area of by the use of temporal three-phase (1980s, 1990s, 2000s) land-use maps, soil type map (1:200,000 scale), and 1980–2008 daily time series of rainfall from the upper Huaihe River basin. Within the model, potential evapotranspiration was computed using the Penman-Monteith method coupled with a simplified plant growth model. On the basis of the simulated time series of daily runoff, land-use change effects on spatio-temporal change patterns of runoff coefficients and runoff modules, the rainfall-runoff relationship, the sensitivity of rainfall-runoff relationship to rainfall for different types of land use, and impact of land-use patterns on rainfall-runoff relationships were investigated. The results revealed that under the same condition of soil texture and terrain slope, the advantage for runoff generation and the sensitivity of rainfall-runoff relationship to rainfall decreased by farmland, paddy field, and woodland. With the same rainfall, the advantage for runoff generation increased by the 1990s, 2000s, and 1980s land-use patterns. The outputs could provide important references for soil and water conservation and river health protection in the upper stream reach of the Huaihe River.
Investigation into the Impacts of Land-Use Change on Runoff Generation Characteristics in the Upper Huaihe River Basin, China
Land-use change has significant impacts on hydrologic processes at the watershed level; thus, quantitative assessment on the impacts of land-use change is vital for basin environment protection and water resources sustainable development. Owing largely to computer and geographical information system (GIS) technology improvements, the distributed hydrological models, which allow describing the temporal variability and spatial distribution of water-balance components, offer an effective approach to quantify the land-use change effects on watershed water quantity. In this study, a soil and water assessment tool model was used to simulate land-use change effects on water quantity in the upper Huaihe River basin in China above the Xixian hydrological controlling station with a catchment area of by the use of temporal three-phase (1980s, 1990s, 2000s) land-use maps, soil type map (1:200,000 scale), and 1980–2008 daily time series of rainfall from the upper Huaihe River basin. Within the model, potential evapotranspiration was computed using the Penman-Monteith method coupled with a simplified plant growth model. On the basis of the simulated time series of daily runoff, land-use change effects on spatio-temporal change patterns of runoff coefficients and runoff modules, the rainfall-runoff relationship, the sensitivity of rainfall-runoff relationship to rainfall for different types of land use, and impact of land-use patterns on rainfall-runoff relationships were investigated. The results revealed that under the same condition of soil texture and terrain slope, the advantage for runoff generation and the sensitivity of rainfall-runoff relationship to rainfall decreased by farmland, paddy field, and woodland. With the same rainfall, the advantage for runoff generation increased by the 1990s, 2000s, and 1980s land-use patterns. The outputs could provide important references for soil and water conservation and river health protection in the upper stream reach of the Huaihe River.
Investigation into the Impacts of Land-Use Change on Runoff Generation Characteristics in the Upper Huaihe River Basin, China
Li, Qiongfang (author) / Cai, Tao (author) / Yu, Meixiu (author) / Lu, Guobin (author) / Xie, Wei (author) / Bai, Xue (author)
Journal of Hydrologic Engineering ; 18 ; 1464-1470
2011-08-08
72013-01-01 pages
Article (Journal)
Electronic Resource
English
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