刘永和,胡永红,李艳利

• 1:河南理工大学资源环境学院
• 2:中国科学院遥感与数字地球研究所数字地球重点实验室

摘要(Abstract)：

针对地势平坦且空间范围较大的流域水系自动提取任务中,采用常规的洼地填充算法难以提取出完整水系,形成大量"断头河"的问题,提出了一种能够导出整个数字高程模型(DEM)所有像元被淹没的次序表的方法,由该次序表构成的矩阵代替原有DEM来实现流向的计算,进而提取出累积流向及分级河道。经用覆盖中心流域的高精度DEM以及覆盖黄河和长江等大型流域的DEM来测试,结果表明:用其他算法提取结果均发生了"断头河"错误,而该方法则能提取出完整的水系。这种方法能正确实施洼地填充和像元填平处理,可以适应于任意规模和精度的DEM填洼问题,具有较强的鲁棒性,克服了以往算法难以处理大河流域DEM洼地填充的不足。

关键词(KeyWords)： 栅格DEM;洼地填充;河网提取;数字水系;黄河流域

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41105074,41275108);; 河南理工大学博士研究基金项目(B2011-038);; 中国科学院数字地球重点实验室开放基金项目(2011LDE010)

作者(Author): 刘永和,胡永红,李艳利

DOI: 10.16251/j.cnki.1009-2307.2017.01.026

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