| Influence of Land Use/Cover Change on Storm Runoff— A Case Study of Xitiaoxi River Basin in Upstream of Taihu Lake Watershed |
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| 作者姓名： | WAN Rongrong YANG Guishan |
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| 作者单位： | Nanjing Institute of Geography ＆ Limnology, Chinese Academy of Sciences, Nanjing 210008, China |
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| 基金项目： | Under the auspices of Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX3-SW-331) |
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| 摘 要： | Land use/cover change (LUCC) is one of the main boundary conditions which influence many hydrologic processes. In view of the importance of Taihu Lake Watershed in China and the urgency of discovering the impacts of LUCC on storm runoff, two flood events under five land cover scenarios in the Xitiaoxi River Basin of the upstream of Taihu Lake watershed were simulated by distributed hydrologic modeling system HEC-HMS. The influences of each land cover on storm runoff were discussed. It was concluded that under the same rainstorm the ascending order of runoff coefficient and peak flow produced by the 5 different land covers were woodland, shrub, grassland, arable land, and built-up land; the descending order of swelling time were woodland, shrub, grassland, arable land, and built-up land. Scenario of built-up land was the first to reach peak flow, then arable land, grassland, shrub, and woodland. There were close relationships between the runoff coefficients produced by the 5 different land covers. The degrees of impacts on runoff coefficient of land cover change modes were sorted by descending: woodland to built-up land, shrub to built-up land, grassland to built-up land, arable land to built-up land, woodland to arable land, shrub to arable land, arable land to grassland, shrub to grassland, grassland to arable land, and woodland to shrub. Urbanization will contribute to flood disaster, while forestation will mitigate flood disaster.
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| 关 键 词： | 暴风雨 径流 洪水 土壤流失 |
| 收稿时间： | 2006-11-05 |
| 修稿时间： | 2007-06-24 |
Influence of land use/cover change on storm runoff—A case study of Xitiaoxi River Basin in upstream of Taihu Lake Watershed |
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| WAN Rongrong YANG Guishan.Influence of land use/cover change on storm runoff—A case study of Xitiaoxi River Basin in upstream of Taihu Lake Watershed[J].Chinese Geographical Science,2007,17(4):349-356. |
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| Authors: | Wan Rongrong Yang Guishan |
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| Institution: | (1) Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing, 210008, China |
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| Abstract: | Land use/cover change (LUCC) is one of the main boundary conditions which influence many hydrologic processes. In view of the importance of Taihu Lake Watershed in China and the urgency of discovering the impacts of LUCC on storm runoff, two flood events under five land cover scenarios in the Xitiaoxi River Basin of the upstream of Taihu Lake watershed were simulated by distributed hydrologic modeling system HEC-HMS. The influences of each land cover on storm runoff were discussed. It was concluded that under the same rainstorm the ascending order of runoff coefficient and peak flow produced by the 5 different land covers were woodland, shrub, grassland, arable land, and built-up land; the descending order of swelling time were woodland, shrub, grassland, arable land, and built-up land. Scenario of built-up land was the first to reach peak flow, then arable land, grassland, shrub, and woodland. There were close relationships between the runoff coefficients produced by the 5 different land covers. The degrees of impacts on runoff coefficient of land cover change modes were sorted by descending: woodland to built-up land, shrub to built-up land, grassland to built-up land, arable land to built-up land, woodland to arable land, shrub to arable land, arable land to grassland, shrub to grassland, grassland to arable land, and woodland to shrub. Urbanization will contribute to flood disaster, while forestation will mitigate flood disaster. |
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| Keywords: | land-use/cover change (LUCC) storm runoff flood events hydrologic model Xitiaoxi River Basin |
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