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| DEM格网尺度对AnnAGNPS预测山地小流域径流和物质输出的影响 | |
| 引用本文： | 田耀武,黄志霖,曾立雄,肖文发,马德举.DEM格网尺度对AnnAGNPS预测山地小流域径流和物质输出的影响[J].环境科学学报,2009,29(4):846-853. |
| 作者姓名： | 田耀武 黄志霖 曾立雄 肖文发 马德举 |
| 作者单位： | 1. 中山大学生命科学学院,广州,510275;中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京,100091 2. 中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京,100091 3. 秭归县林业局,宜昌,443600 |
| 摘 要： | 为了解流域地形空间参数和其它参数的精度对农业非点源污染模型AnnAGNPS预测准确性的影响,利用三峡库区黑河小流域观测资料校准了AnnAGNPS模型,分析了1.5-12.5m格网尺度DEM对地形参数和模型负载输出的影响.结果表明,1.5～12.5m格网尺度DEM对流域径流量、洪峰流量、总N输出影响不显著,但对泥沙、总P、有机碳输出影响显著.三峡库区类似小流域宜采用5m格网尺度DEM,AnnAGNPS模型较不适合于尺度较小、坡度较大的小流域泥沙负载预测. |
| 关 键 词： | 格网尺度 AnnAGNPS模型 小尺度流域 地形参数 泥沙输出 径流 |
| 收稿时间： | 2008/5/23 0:00:00 |
| 修稿时间： | 2008/10/4 0:00:00 |
Impact of DEM mesh size on AnnAGNPS runoff and sediment predictions for a small-scale hilly watershed |
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| TIAN Yaowu,HUANG Zhilin,ZENG Lixiong,XIAO Wenfa and MA Deju.Impact of DEM mesh size on AnnAGNPS runoff and sediment predictions for a small-scale hilly watershed[J].Acta Scientiae Circumstantiae,2009,29(4):846-853. | |
| Authors: | TIAN Yaowu HUANG Zhilin ZENG Lixiong XIAO Wenfa and MA Deju |
| Institution: | TIAN Yaowu1,2,HUANG Zhilin2,ZENG Lixiong2,XIAO Wenfa2,MA Deju3 1.School of Life Science,Sun Yat-sen University,Guangzhou 510275 2.Key Laboratory of Forest Ecology , Environment,State Forestry Administration China,Research Institute of Forest Ecology,Environment , Protection,CAF,Beijing 100091 3.Forestry Bureau of Zigui Country,Yichang 443600 |
| Abstract: | The input of nutrients from agricultural non-point sources(AGNPSs),sediment delivery and worsening of water quality have become challenging issues threatening water security,human health and natural ecosystems in the Three Gorges Reservoir area.The agricultural non-point source(AGNPS)model is a useful tool for analysis of agricultural watershed management scenarios.The accuracy of agricultural nonpoint source pollution models depends to a great extent on how well model input spatial parameters describe the ... |
| Keywords: | DEM mesh size AnnAGNPS model small-scale watershed topographic parameter sediment transport runoff |
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