| 一种基于DEM汇水累积量的径流节点提取方法 |
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| 引用本文： | 钱柯健,朱红春,李发源.一种基于DEM汇水累积量的径流节点提取方法[J].测绘科学,2012(1):28-29,59. |
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| 作者姓名： | 钱柯健 朱红春 李发源 |
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| 作者单位： | 南京师范大学地理科学学院 |
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| 基金项目： | 国家自然科学基金资助项目(40930531,41001294,40801148) |
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| 摘 要： | 快速有效地提取径流节点,对进行水系的形态和属性特征研究具有重要意义。已有的研究发现:径流节点在汇水累积量上具有显著的突变性和多向汇集性特征,在充分考虑此水文特征的基础上,本文运用GIS窗口分析的方法原理,设计了可行的基于高精度DEM数据的径流节点提取方法,完成了对实验样区DEM数据的径流节点提取。通过与实测的径流节点数量和分布的结果对比,验证了该方法具有理想的精度,同时具有较高的执行效率。
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| 关 键 词： | DEM 汇水累积量 径流节点 提取 |
A method of deriving stream runoff nodes based on accumulation from DEM |
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| QIAN Ke-jian,ZHU Hong-chun,LI Fa-yuan.A method of deriving stream runoff nodes based on accumulation from DEM[J].Science of Surveying and Mapping,2012(1):28-29,59. |
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| Authors: | QIAN Ke-jian ZHU Hong-chun LI Fa-yuan |
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| Institution: | (College of Geographical Sciences,Nanjing Normal University,Nanjing 210046,China) |
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| Abstract: | Stream runoff nodes are the characteristic points which imply plenty of spatial and hydrological information of networks.With the feature of an obvious jump in the accumulation of runoff nodes and accumulating water from various directions,a method based on focal analysis and DEM of high resolution was put forward to derive runoff nodes efficiently,which could give a reference to analyzing features of stream networks. |
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| Keywords: | DEM accumulation stream runoff node derivation |
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