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| 长江流域侵蚀产沙尺度效应的区域分异 | |
| 引用本文： | 闫云霞,许炯心,Marwan Hasson,廖建华.长江流域侵蚀产沙尺度效应的区域分异[J].山地学报,2011,29(2). |
| 作者姓名： | 闫云霞 许炯心 Marwan Hasson 廖建华 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所,中国科学院水循环与地表过程重点实验室,北京,100101 2. Department of Geography,University of British Columbia,Vancouver,British Columbia,Canada.V6T 1Z2 3. 江西师范大学,地理与环境教育学院,江西,南昌,330022 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 以长江流域水文站点的观测数据为依据,基于一定的分区原则,将整个长江流域分成了8个区域,对所有分区产沙模数的尺度效应进行了深入分析.研究表明,所有分区产沙模数的尺度效应可以概括为三类:产沙模数随流域面积的增大而减小,或先减小后基本保持不变的,主要包括长江中下游干流沿岸区域,岷江主体区域,洞庭湖流域和鄱阳湖流域;产沙模数随流域面积的增大基本保持不变的,包括嘉陵江主体区域和汉江流域;产沙模数随流域面积增大而增大,或先增大后基本保持不变的,包括长江上游干流沿岸的非泥石流区域和乌江流域.不同流域尺度效应的差异主要与流域土地利用方式有关.基于各分区校正方程,将所有站点进行了标准面积为100 km2,1 000 km2,10 000 km2的尺度校正,结果表明,当校正面积为100 km2,侵蚀最强烈的区域主要是岷江流域,其次是鄱阳湖和洞庭湖流域,校正面积为1 000 km2和10 000 km2,产沙模数图变化不显著,但明显区别于校正面积为100km2下的产沙模数图.侵蚀最强烈的区域主要是嘉陵江流域,其次是长江上游干流沿岸的部分区域和汉江流域的部分区域.不同校正面积下产沙模数图的变化,显示了不同流域侵蚀来源的差异. |
| 关 键 词： | 长江流域 分区 产沙模数 尺度效应 尺度校正 |
Spatial Variation of Scale Effects of Sediment Yield in the Yangtze River Basin |
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| YAN Yunxia,XU Jiongxin,Marwan Hasson,LIAO Jianhua.Spatial Variation of Scale Effects of Sediment Yield in the Yangtze River Basin[J].Journal of Mountain Research,2011,29(2). | |
| Authors: | YAN Yunxia XU Jiongxin Marwan Hasson LIAO Jianhua |
| Institution: | YAN Yunxia1,XU Jiongxin1,Marwan Hasson2,LIAO Jianhua3(1.Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,Key Laboratory of Water Cycle and Related Land Surface Processes,Beijing 100101,China,2,Department of Geography,University of British Columbia,Vancouver,British Columbia,Canada.V6T 1Z2,3.School of Geography and Environment,Jiangxi Normal University,Nanchang 330022,China) |
| Abstract: | Spatial variation of sediment yield of Yangtze river basin is studied in this paper.The basin is divided into eight homogenous subbasins.326 stations with drainage area less than 30 000 km2 were used to study the scale effect of sediment yield for the whole study area.As a river basin which suffers intensive human activities,scale effect of each sub region is heavily influenced by land use and cover.All of 8 subbasins are classified as 3 types,I,soil erosion mainly comes from deforestation and sleep slope c... |
| Keywords: | Yangtze river basin sediment yield scale effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |