Algorithm for Precise Drainage-Basin Delineation
Algorithm for Precise Drainage-Basin Delineation
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DOI：
10.1061/(asce)0733-9429(1994)120:3(298
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发表时间：
1994-03
影响因子：
2.4
通讯作者：
E. J. Nelson;N. Jones;A. W. Miller
中科院分区：
文献类型：
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作者：
E. J. Nelson;N. Jones;A. W. Miller
基于计算机的地形模型作为一种自动化获取水文分析所需的几何数据的工具，已经越来越受欢迎。提出了一种利用不规则三角网（TINs）精确圈定流域边界的算法。可以对流入TIN上定义的单个点或流网络的区域进行边界划定。该算法的一个特点是，流网络的段不需要对应于通道边缘。这使得在TIN上定义河流网络具有更大的灵活性，并且可以将边界划定算法应用于河流网络可能由街道和运河等人造结构主导的城市地区或地形很少起伏的农村地区。一旦建立了流域边界，诸如流域面积、坡度和最大流量距离等几何参数就很容易计算出来。这些工具可以与HEC-1等水文建模软件相结合，创建一个全面的水文建模环境。
Computer-based terrain models have become increasingly popular as a tool for automating much of the geometrical data acquisition necessary for hydrologic analyses. An algorithm is presented that uses triangulated irregular networks (TINs) to accurately delineate drainage-basin boundaries. Boundary delineation can be performed for areas that drain to individual points or stream networks defined on the TIN. A special feature of the algorithm is that the segments of the stream network need not correspond to channel edges. This allows greater flexibility in defining stream networks on the TIN and makes it possible to apply the boundary delineation algorithm to urban areas where the stream networks may be dominated by manmade structures such as streets and canals or to rural areas where the terrain exhibits little relief. Once the basin boundaries are established, geometric parameters such as basin areas, slopes, and maximum flow distances are easily computed. These tools can be combined with hydrologic modeling software such as HEC-1 to create a comprehensive hydrologic modeling environment.