| 基于SRTM_DEM的泾河流域特征信息提取研究 |
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| 引用本文： | 王峥,Nguyen Thi Tinh,马孝义,尹京川,胡杰华.基于SRTM_DEM的泾河流域特征信息提取研究[J].中国农村水利水电,2011(11). |
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| 作者姓名： | 王峥 Nguyen Thi Tinh 马孝义 尹京川 胡杰华 |
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| 作者单位： | 西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目(50879072); 国家科技支撑计划课题(2006BAD11B04); 西北农林科技大学人才专项基金项目(BJRC-2009-001) |
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| 摘 要： | 流域特征信息的提取对于水文地理信息分析、模拟技术和水文模型建立具有重要意义。基于STRM_DEM数据，在ArcGIS9．3环境下，提取泾河流域坡度、坡向等地形特征，以及河网、流域边界和面积等水文要素，并划分子流域。分析表明，当闽值取5000（40．5km^2）时，生成的流域河网能够较好地反映该地区水系。根据河网分级、低级集水区域生成结果和流域地形特征，可划分为32个子流域，为流域分布式水文模型的构建提供了基础地理信息。SRTM_DEM提取泾河和部分支流流域面积误差均较小，说明提取结果与实际非常接近。结果表明，SRTM_DEM数据和ArcGIS9．3提取流域特征信息方便快捷，具有较高的精度和准确性，应用前景广阔。
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| 关 键 词： | SRTM_DEM 泾河流域 河网 子流域 流域面积 |
Research on Extraction of Hydrological Information in the Jinghe River Basin Based on SRTM_DEM |
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| WANG Zheng,Nguyen Thi Tinh,MA Xiao-yi,YIN Jing-chuan,HU Jie-hua.Research on Extraction of Hydrological Information in the Jinghe River Basin Based on SRTM_DEM[J].China Rural Water and Hydropower,2011(11). |
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| Authors: | WANG Zheng Nguyen Thi Tinh MA Xiao-yi YIN Jing-chuan HU Jie-hua |
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| Institution: | WANG Zheng,Nguyen Thi Tinh,MA Xiao-yi,YIN Jing-chuan,HU Jie-hua (Key Laboratory forAgricultural Soil and Water Engineering in Arid Areas,Ministry of Education,Northwest Agricultural and Forestry University,Yangling 712100,Shaanxi Province,China) |
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| Abstract: | The extraction of watershed feature information is significant to hydrology and geographic information analysis,simulation technology and the establishment of the hydrological model.Based on STRM_DEM data in ArcGIS 9.3 environment,extraction of the gradient,aspect,the river network,river watershed boundary and area,and extracting subbasin.An analysis shows that,a threshold of 5000(40.5 km2) will make river network reflect the region water system better.According to the classification,small river catchment a... |
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| Keywords: | SRTM_DEM Jinghe River Basin river network subbasin drainage area |
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