| 基于水系改进的高分辨率DEM和GEOWEPP的流域产沙量估算及其空间尺度效应研究 |
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| 引用本文： | 倪九派,高明,魏朝富,谢德体. 基于水系改进的高分辨率DEM和GEOWEPP的流域产沙量估算及其空间尺度效应研究[J]. 土壤学报, 2010, 47(1): 1-6 |
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| 作者姓名： | 倪九派 高明 魏朝富 谢德体 |
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| 作者单位： | 西南大学资源环境学院,重庆,400715 |
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| 基金项目： | 国家自然科学基金项目（40701093、40671115）资助 |
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| 摘 要： | 基于水系改进的高分辨率DEM和GEOWEPP,从坡面、子流域和流域3种空间尺度对五桥河流域产沙量进行了估算。结果表明,从不同的空间尺度进行考察,流域的水土流失特征存在较大的差异。从坡面尺度到子流域尺度和流域尺度,研究区114.6 km2面积上的年产沙总量从3.79×105t减少至1.25×105t和0.84×105t,单位面积年产沙量从33.09 t hm-2减少至10.94 t hm-2和7.29 t hm-2,年均泥沙输移比从1.000减小至0.331和0.220。将GIS与GEOWEPP结合,既能反映流域输出终端的泥沙量,又可以刻画流域内部土壤侵蚀的强度和空间分布,能为流域水土保持措施布置提供更为科学的依据。
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| 关 键 词： | 高分辨率DEM GEOWEPP 流域产沙量 空间尺度效应 |
Watershed sediment yield and effect of spatial scale based on high resolution digital elevation model and GEOWEPP |
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| Ni Jiupai,Gao Ming,Wei Chaofu and Xie Deti. Watershed sediment yield and effect of spatial scale based on high resolution digital elevation model and GEOWEPP[J]. Acta Pedologica Sinica, 2010, 47(1): 1-6 |
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| Authors: | Ni Jiupai Gao Ming Wei Chaofu Xie Deti |
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| Affiliation: | Ni Jiupai Gao Ming Wei Chaofu Xie Deti(College of Resources and Environment,Southwest University,Chongqing 400715,China) |
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| Abstract: | The quantitative evaluation on effect of spatial scale on soil and water loss is the key issue ofscale,pattern and processof soil and water loss because soil and water loss is the representative process with variability in multi-scale.The sediment of Wu-qiao-he watershed was estimated in three spatial scales based on high resolution digital elevation model and GEOWEPP in this paper.Results showed that there were obvious discrepancy on the characteristics of watershed soil and water loss in different spatial... |
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| Keywords: | High resolution digital elevation model GEOWEPP Watershed sediment yield Effect of spatial scale |
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