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| 基于均值变点分析的三峡库区河网提取研究 | |
| 引用本文： | 赖晗,芮小平,梁汉东,毕晓玲,杨在兴,陆瑾.基于均值变点分析的三峡库区河网提取研究[J].测绘科学,2012,37(5):173-175. |
| 作者姓名： | 赖晗 芮小平 梁汉东 毕晓玲 杨在兴 陆瑾 |
| 作者单位： | 1. 中国矿业大学地球科学与测绘工程学院,北京,100083 2. 中国科学院研究生院,北京,100049 3. 首都师范大学资源环境与旅游学院,北京,100048 4. 西安科技大学测绘科学与技术学院,西安,710054 5. 中国水利水电科学研究院水环境研究所,北京,100038 |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2009ZX07104-006) |
| 摘 要： | 均值变点是最常见最直观的一种类型,它以平均值为分析对象,通过计算整个样本数据的方差(S)与分段样本的统计量(Si)之差来确定变点,变点的存在会使S和Si的差距增大。本文以SRTM DEM数据作为基本的地形数据,借助Arc Hydro Tools扩展模块,研究基于地表径流漫流模型的数字河网提取方法,采用均值变点分析法确定提取河网的阈值,并对结果进行分析。经对比发现,提取的主干河网与1∶250 000地形图主干上吻合较好,次流上更具真实性,提取结果可以用于各种地形分析。 |
| 关 键 词： | SRTM DEM 河网 均值变点 阈值 |
Extraction of drainage network in Three Gorge reservoir area based on mean change point method |
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| LAI Han , RUI Xiao-ping , LIANG Han-dong , BI Xiao-ling , YANG Zai-xing , LU Jin.Extraction of drainage network in Three Gorge reservoir area based on mean change point method[J].Science of Surveying and Mapping,2012,37(5):173-175. | |
| Authors: | LAI Han RUI Xiao-ping LIANG Han-dong BI Xiao-ling YANG Zai-xing LU Jin |
| Institution: | ⑤(①College of Geoscience and Surveying Engineering,CUMTB,Beijing 100083,China;②Institute of Graduate of China Academy of Science,Beijing 100049,China;③College of Resource Environment and Tourism,CNU,Beijing 100048,China;④Science and Technology College of Geomatics,XUST,Xi’an 710054,China;⑤Department of Water Environment,China Research Institute of Water Resources and Hydropower,Beijing 100038,China) |
| Abstract: | Mean change point is the most common and intuitive type,it chooses the mean value as the research object and determines the change point by calculating the difference between S and Si.The existence of change point would increase the gap between S and Si.The paper took the SRTM DEM data as the basic terrain data,studied the method of how to extract drainage network based on ground water overflow model,determined the threshold of drainage extraction relying on the mean change-point analysis method and analyzed the extraction results.By contrast,the authors found that the main drainage network competed well with the 1:250 000 topographic map but there were some slight differences in the tributary.The result could be used in all kinds of terrain analysis. |
| Keywords: | SRTM DEM drainage network mean change point threshold |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |