张占阳,郑红梅,郭新成,王金良

• 1:长安大学地质工程与测绘学院
• 2:北京四维图新科技股份有限公司

摘要(Abstract)：

在局部特殊地形如细窄的沟渠等地带,水流方向可能是惟一的,即当前点的水应全部流入下游惟一的格网点,此时若采用多流向算法不仅会导致水流方向产生较大误差,而且可能影响区域汇水面积的精确计算。为解决此问题,本文提出了一种水流路径算法,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来确定并计算该点的水流流向及流量分配比例。最后通过实例证明了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DEM沟谷段和分水线段的提取奠定了基础。

关键词(KeyWords)： DEM;单流向算法;多流向算法;局部趋势面;正切曲率;流线曲率

Abstract:

Keywords:

基金项目(Foundation): 陕西省测绘局空间关系相似性项目(CHD2009JC073)

作者(Author): 张占阳,郑红梅,郭新成,王金良

DOI: 10.16251/j.cnki.1009-2307.2013.02.044

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