| 黄河内蒙古河段冲淤演变及其影响因素(英文) |
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| 引用本文： | 秦毅,张晓芳,王凤龙,颜恒,韩海军.黄河内蒙古河段冲淤演变及其影响因素(英文)[J].地理学报(英文版),2011,21(6):1037-1046. |
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| 作者姓名： | 秦毅 张晓芳 王凤龙 颜恒 韩海军 |
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| 作者单位： | Key Laboratory of North-West Water Resources and Ecology Environment of Ministry of Education;Xi'an University of Technology;Zhoushan Water Conservancy Survey and Design Institute;Harbin Water Conservancy Plan and Design Institute; |
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| 基金项目： | National Basic Research Program of China, No.2011CB403305 |
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| 摘 要： | Rivers with fluvial equilibrium are characterized by bed deformation adjustment. The erosion-deposition area in cross-section reflects this characteristic, which is a base of researching the river scour and deposition evolution by time series analysis. With an erosion-deposition area indicator method proposed in this paper, the time series of erosion-deposition area quantity at Bygl and Shhk stations were obtained with the series duration of 31 years from 1976 to 2006. After analysis of its trend and mutation, three different ten- dencies about the evolution were observed in general from the quasi-equilibrium phase through a rapid shrinkage to the final new quasi-equilibrium. It is also found that the trend of erosion-deposition area series will change once a big flood occurred in some of the tributaries, and its ever greater influence is due to the decrease of deluge with the completion of upstream reservoirs. Almost all the turning points were coincident with the time when hyper-concentrated sediment flood occurred in some tributaries. With the time series of clear mutations since the late 1990s, the Inner Mongolian Reach has been in a new equilibrium phase. This can be concluded in two aspects. 1. The absence of big floods and sediment transportation from tributaries result in the river shrinkage, and to regain the channel flow-carrying capacity in Inner Mongolian Reach a large flood is needed both of high peak discharge and of lengthy interval to destroy the new equilibrium. 2. The proposed method of erosion-deposition area indicator is of great help to channel scoureposition evolution analysis because it can demonstrate real time deformation of cross section in quantity.
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| 关 键 词： | Inner Mongolian Reach of the Yellow River erosion-deposition area indicator evolution equilibrium |
Scour and silting evolution and its influencing factors in Inner Mongolian Reach of the Yellow River |
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| Yi?Qin,Xiaofang?Zhang,Fenglong?Wang,Heng?Yan,Haijun?Han.Scour and silting evolution and its influencing factors in Inner Mongolian Reach of the Yellow River[J].Journal of Geographical Sciences,2011,21(6):1037-1046. |
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| Authors: | Yi Qin Xiaofang Zhang Fenglong Wang Heng Yan Haijun Han |
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| Institution: | 1. Key Laboratory of North-West Water Resources and Ecology Environment of Ministry of Education, Xi’an University of Technology, Xi’an 710048, China; 2. Zhoushan Water Conservancy Survey and Design Institute, Zhoushan 316000, Zhejiang, China; 3. Harbin Water Conservancy Plan and Design Institute, Harbin 150076, China |
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| Abstract: | Rivers with fluvial equilibrium are characterized by bed deformation adjustment. The erosion-deposition area in cross-section
reflects this characteristic, which is a base of researching the river scour and deposition evolution by time series analysis.
With an erosion-deposition area indicator method proposed in this paper, the time series of erosion-deposition area quantity
at Bygl and Shhk stations were obtained with the series duration of 31 years from 1976 to 2006. After analysis of its trend
and mutation, three different tendencies about the evolution were observed in general from the quasi-equilibrium phase through
a rapid shrinkage to the final new quasi-equilibrium. It is also found that the trend of erosion-deposition area series will
change once a big flood occurred in some of the tributaries, and its ever greater influence is due to the decrease of deluge
with the completion of upstream reservoirs. Almost all the turning points were coincident with the time when hyper-concentrated
sediment flood occurred in some tributaries. With the time series of clear mutations since the late 1990s, the Inner Mongolian
Reach has been in a new equilibrium phase. This can be concluded in two aspects. 1. The absence of big floods and sediment
transportation from tributaries result in the river shrinkage, and to regain the channel flow-carrying capacity in Inner Mongolian
Reach a large flood is needed both of high peak discharge and of lengthy interval to destroy the new equilibrium. 2. The proposed
method of erosion-deposition area indicator is of great help to channel scour-deposition evolution analysis because it can
demonstrate real time deformation of cross section in quantity. |
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| Keywords: | Inner Mongolian Reach of the Yellow River erosion-deposition area indicator evolution equilibrium |
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