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| 长江中游马口-田家镇河段40年来河道演变 | |
| 引用本文： | 张强,陈永勤,姜彤,李茂田.长江中游马口-田家镇河段40年来河道演变[J].地理学报(英文版),2007,17(4):442-452. |
| 作者姓名： | 张强 陈永勤 姜彤 李茂田 |
| 作者单位： | Department of Geography and Resource Management and Institute of Space and Earth Information Science The Chinese University of Hong Kong Shatin Laboratory for Climate Studies National Climate Center China Meteorological Administration Beijing 100081 China，Department of Geography and Resource Management and Institute of Space and Earth Information Science The Chinese University of Hong Kong Shatin，Nanjing Institute of Geography and Limnology CAS，Laboratory for Climate Studies National Climate Center China Meteorological Administration，Hong Kong China Nanjing Institute of Geography and Limnology CAS Nanjing 210008 China，Hong Kong China，Nanjing 210008 China，Beijing 100081 China |
| 基金项目： | The research was financially supported by the Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, No.CCSF2007-35，Supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, No.CUHK4627/05H |
| 摘 要： | Quantitative analysis was performed on the filling-scouring process for the river reach within Makou and Tianjiazhen, the middle Yangtze River with the help of GIS and DEM techniques. The research results indicate that the river reach between Makou and Tianjiazhen was dominated by the scouring process, and the magnitude of scouring is increasing over time. The intensity of scouring process is more in the deep and narrower river reach than shallower and wider ones. The river reach in the Makou and Tianjiazhen river knot is in fre-quent scouring and filling process, however the river reach upper to the Makou and lower to the Tianjiazhen river knot is in moderate scouring and filling process. The river reach just upstream or downstream to the river knot (e.g. Makou and Tianjiazhen river knot in this research) is dominated by filling process and the river reach in the river knot is dominated by the scouring process. Research results indicate no changes in the boundary of the river but the scouring and the filling magnitude in specific river channel is strong. The filling and the scouring process of the study river reach is greatly impacted by the sediments and water from the upstream of the study river reach. The construction of the Three Gorges Dam just upstream to Yichang will cause further decrease of the release of the sediment load to the middle and the lower Yangtze River basin, which will further intensify the scouring process of the river channel in the study river reach. |
| 关 键 词： | 长江中游 马口-田家镇 河段 河道演变 |
| 收稿时间： | 27 March 2007 |
| 修稿时间： | 2007-03-27 |
Channel changes of the Makou-Tianjiazhen reach in the middle Yangtze River during the past 40 years |
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| Zhang?Qiang,Chen?Yongqin?David,Jiang?Tong,Li?Maotian.Channel changes of the Makou-Tianjiazhen reach in the middle Yangtze River during the past 40 years[J].Journal of Geographical Sciences,2007,17(4):442-452. | |
| Authors: | Zhang Qiang Chen Yongqin David Jiang Tong Li Maotian |
| Institution: | 1. Department of Geography and Resource Management and Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin, Hong Kong, China;Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China;Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing 100081, China 2. Department of Geography and Resource Management and Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin, Hong Kong, China 3. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China 4. Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing 100081, China |
| Abstract: | Quantitative analysis was performed on the filling-scouring process for the river reach within Makou and Tianjiazhen, the middle Yangtze River with the help of GIS and DEM techniques. The research results indicate that the river reach between Makou and Tianjiazhen was dominated by the scouring process, and the magnitude of scouring is increasing over time. The intensity of scouring process is more in the deep and narrower river reach than shallower and wider ones. The river reach in the Makou and Tianjiazhen river knot is in fre-quent scouring and filling process, however the river reach upper to the Makou and lower to the Tianjiazhen river knot is in moderate scouring and filling process. The river reach just upstream or downstream to the river knot (e.g. Makou and Tianjiazhen river knot in this research) is dominated by filling process and the river reach in the river knot is dominated by the scouring process. Research results indicate no changes in the boundary of the river but the scouring and the filling magnitude in specific river channel is strong. The filling and the scouring process of the study river reach is greatly impacted by the sediments and water from the upstream of the study river reach. The construction of the Three Gorges Dam just upstream to Yichang will cause further decrease of the release of the sediment load to the middle and the lower Yangtze River basin, which will further intensify the scouring process of the river channel in the study river reach. |
| Keywords: | Makou-Tianjiazhen river reach GIS DEM river channel changes |
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