| 基于ArcGIS的流域水文特征分析方法研究 |
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| 引用本文： | 胡应剑.基于ArcGIS的流域水文特征分析方法研究[J].测绘与空间地理信息,2018(1):167-171. |
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| 作者姓名： | 胡应剑 |
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| 作者单位： | 广西壮族自治区地理信息测绘院,广西 柳州,545005 |
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| 摘 要： | 随着GIS技术的不断发展和DEM的广泛应用,基于DEM的流域水文特征分析研究受到越来越多的关注。目前,基于格网DEM的水流方向算法,会因为地形的局限,无法准确地进行模拟分流,水流方向也不符合实际流向。本文分析了几种基于DEM的水流方向算法,以格网点为中心建立3×3窗口的局部趋势面,计算出研究区内的曲率,分析区域内的水流聚合度和发散性随着曲率的变化情况,最后根据水流方向算法提取河网。
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| 关 键 词： | ArcGIS DEM 流向算法 曲率 流域分析 汇流阈值 河网提取 ArcGIS DEM flow direction arithmetic curvature watershed analysis convergence threshold network extraction |
Research on Watershed Hydrological Characteristic Analysis Method Based on ArcGIS |
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| HU Yingjian.Research on Watershed Hydrological Characteristic Analysis Method Based on ArcGIS[J].Geomatics & Spatial Information Technology,2018(1):167-171. |
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| Authors: | HU Yingjian |
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| Abstract: | With the wide application of the improvement of GIS technology and DEM, DEM-based basin hydrologic characteristic a-nalysis of receiving more and more attention. At present, in the flow direction algorithm based on grid DEM, algorithms for terrain limi-tations, cannot be accurately simulated shunting;the current direction does not correspond with the actual flow. This paper analyzes several flow direction algorithms based on DEM and dot for the Centre to establish local trends in 3x3 windows, calculate curvature of the study area, analysis of flow aggregation in regional and divergent with the change of curvature. |
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