| 水平分辨率对提取数字流域地貌特征值的影响 |
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| 引用本文： | 宫兴龙,芮孝芳,罗静.水平分辨率对提取数字流域地貌特征值的影响[J].广西大学学报(自然科学版),2010,35(1). |
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| 作者姓名： | 宫兴龙 芮孝芳 罗静 |
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| 作者单位： | 1. 河海大学水文水资源与水利工程科学国家重点实验室,江苏,南京,210098;河海大学水文水资源学院,江苏,南京,210098
2. 河海大学水文水资源与水利工程科学国家重点实验室,江苏,南京,210098 |
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| 基金项目： | 水利部公益性行业科研专项经费资助项目(200801033) |
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| 摘 要： | 为了研究水平分辨率对提取数字流域地貌特征值的影响,论述了地貌特征坡度和汇流时间的计算方法,采用基于高程双线性多项式内插方法获得了多种水平分辨率的DEM,分析了水平分辨率对于坡度、霍顿数和平均汇流时间影响。研究表明:不同坡度计算方法产生坡度之间存在差异;不同水平分辨率对于坡度、霍顿数和平均汇流时间影响显著,而对于河网长度和河源数影响不明显。
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| 关 键 词： | 水平分辨率 流域地貌特征 信息熵 霍顿数 |
Influence of horizontal resolution on extracting characteristrics of digital river basin |
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| GONG Xing-long,RUI Xiao-fang,LUO Jing.Influence of horizontal resolution on extracting characteristrics of digital river basin[J].Journal of Guangxi University(Natural Science Edition),2010,35(1). |
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| Authors: | GONG Xing-long RUI Xiao-fang LUO Jing |
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| Institution: | 1. State Key Laboratory of Hydrology-Water Resources And Hydraulic Engineering;Hohai University;Nanjing 210098;China;2. College of Hydrology and Water Resources;China |
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| Abstract: | The purpose of this article is in order to study the influences of horizontal resolution on extracting watershed features. In this article,the authors discussed the calculation method of geomorphic feature slope and concentration time,adopted the bilinear polynomial interpolation method based on elevation to obtain various horizontal-resolution DEMs,and analyzed the influences of hori-zontal resolution on slope,Horton number and average concentration time. The results showed that, there are differences betw... |
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| Keywords: | horizontal resolution characteristics of river basin information entropy Horton number |
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