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基于局部曲面正切曲率与流线曲率的水流路径算法研究

发表时间:2011-09-30  浏览量:1607  下载量:696
全部作者: 张占阳,郭新成,王金良,焦永清
作者单位: 长安大学地质工程与测绘学院
摘 要: 提出一种水流路径算法,该算法通过以各格网点为中心建立3×3窗口范围内的局部趋势面,利用该点在局部趋势面中的正切曲率和流线曲率选取合适的单流向或多流向算法,确定并计算该点的水流流向及流量分配比例。最后通过实例证明该方法在水流累积量计算中的良好效果,并在一定程度上为格网数字高程模型(digital elevation model, DEM)沟谷段和分水线段的提取奠定了基础。
关 键 词: 地理信息系统;数字高程模型;单流向算法;多流向算法;局部趋势面;正切曲率;流线曲率
Title: Research on flow paths algorithm based on tangential curvature and flow-path curvature of partial surface
Author: ZHANG Zhanyang, GUO Xincheng, WANG Jinliang, JIAO Yongqing
Organization: College of Geology Engineering and Geomatics, Chang’an University
Abstract: A flow path algorithm is proposed, a piece of partial surface is established through 9 grid points which act as the neighbors of the center grid point and locate in the range of the 3� window, and through the tangential curvature and the flow-path curvature of the current center grid point of the partial surface, the single flow direction algorithm or the multiple flow direction algorithm will be selected to determine the flow direction of the current grid point and calculate its distribution ratio of water flow. Finally, the good results using this method in the accumulation of the water are proved, and this method lays the basis for the extraction of the channel links and the divide links in the grid digital elevation model (DEM) to some extent.
Key words: geographic information system; digital elevation model; single flow direction algorithm; multiple flow direction algorithm; partial surface; tangential curvature; flow-path curvature
发表期数: 2011年9月第18期
引用格式: 张占阳,郭新成,王金良,等. 基于局部曲面正切曲率与流线曲率的水流路径算法研究[J]. 中国科技论文在线精品论文,2011,4(18):1697-1701.
 
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