| 三峡库区蓄水运行前后水土流失时空变化模拟及分析 |
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| 引用本文： | 徐昔保,杨桂山,李恒鹏,苏伟忠.三峡库区蓄水运行前后水土流失时空变化模拟及分析[J].湖泊科学,2011,23(3):429-434. |
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| 作者姓名： | 徐昔保 杨桂山 李恒鹏 苏伟忠 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目，国家自然科学基金项目，中国科学院西部行动计划项目 |
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| 摘 要： | 利用三峡库区水土流失预测模型和250m的MODIS-NDVI数据,模拟三峡库区蓄水运行前后水土流失时空变化,结果表明:三峡库区2000-2008年水土流失波动较大,总体上水土流失面积、总量和强度都旱减弱趋势,2006-2008年年均水土流失总量和面积分别比2000-2002年减少4.10×106t和1129.6km2;...
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| 关 键 词： | 三峡库区 蓄水运行 水土流失 时空变化 模拟 |
| 收稿时间： | 7/8/2010 12:00:00 AM |
| 修稿时间： | 2010/8/27 0:00:00 |
Simulation on the spatial-temporal changes of soil erosion in the Three Gorges Reservoir Area between the pre- and post-storage periods |
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| XU Xibao,YANG Guishan,LI Hengpeng and SU Weizhong.Simulation on the spatial-temporal changes of soil erosion in the Three Gorges Reservoir Area between the pre- and post-storage periods[J].Journal of Lake Science,2011,23(3):429-434. |
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| Authors: | XU Xibao YANG Guishan LI Hengpeng and SU Weizhong |
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| Institution: | (Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,P.R.China) |
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| Abstract: | Spatial and temporal changes of soil erosion in the Three Gorges Reservoir Area(TGKA) between the pre- and post-storage periods were simulated with the soil erosion model using 250m MODIS-NDVI remote sensing data. Hie results showed that:Total amount, area and intensity of soil erosion were all generally at the reducing trends during 2000-2008 with great fluctuations. The average annual total amount and area of soil erosion decreased by 4.10×106t and 1129.6km2 from 2000-2002 to 2006-2008, respectively. The high, very-high and severe types of soil erosion mainly centralized at the forest and cropland above 15° in Zigui, Wushan, Wuxi, Shizhu and Wulong, and soil erosion intensity with lower levels from 2000-2002 to 2006-2008 mainly centralized at the cropland and forest above 10° in Fengjie, Yunyang, Wanzhou and Zhongxian. Spatial and temporal changes of soil erosion in the TGRA were mainly influenced by rainfall intensity and distribution, the resettlement and the operation of the Three Goi^es Project, and the implementation of a series of ecological projects. Although the soil erosion in the TGRA waa reduced, the management of soil and water conservation in the TGRA need to be further strenghthened, especially in the area of Zigui, Xingshan, Badong and Wulong. |
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| Keywords: | Three Gorges Reservoir Area storage period soil erosion spatial-temporal variation simulation |
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