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Volume 24 Issue 6
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Article Navigation >  Advances in Water Science  > 2013  >  24(6): 836-841

LIU Huaixiang, WANG Zhaoyin, LU Yongjun, YU Guo'an. Riverbed sediment response and longitudinal profile adjustment in incised river channels[J]. Advances in Water Science, 2013, 24(6): 836-841.
Citation: LIU Huaixiang, WANG Zhaoyin, LU Yongjun, YU Guo'an. Riverbed sediment response and longitudinal profile adjustment in incised river channels[J]. Advances in Water Science, 2013, 24(6): 836-841.
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Riverbed sediment response and longitudinal profile adjustment in incised river channels

  • 1.

    State Key Laboratory of Hydrology-Water Resources and Hydraulic engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;

  • 2.

    Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China;

  • 3.

    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Funds:  The study is financially supported by the National Basic Research Program of China (No.2012CB417002) and the National Natural Science Foundation of China (No.51009096).
  • Received Date: 2012-10-22
  • Publish Date: 2013-11-25
  • Some of the natural incised river channels have unique features in fluvial morphology and longitudinal profiles. In this study, the relevant mechanisms of fluvial morphology during incision and their influence on longitudinal profiles are investigated through field surveys, and the use of data analysis and geographic information system (GIS) techniques. Results show that there exists a loss and compensatory mechanism of sediment transport in response to riverbed incision, which is an important factor driving this type of river systems towards a state of equilibrium. After deepening, riverbed sediments consume more erosive energy and sustain high gradient channels, leading to special longitudinal profiles. River discharge and riverbed sediment are the dominant elements controlling the formation of longitudinal profiles. After introducing a dimensionless parameter derived from river discharge and riverbed sediment, the channel gradient and the new dimensionless parameter shows a good linear relationship.
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Riverbed sediment response and longitudinal profile adjustment in incised river channels

  • 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;
  • 2. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China;
  • 3. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Funds:  The study is financially supported by the National Basic Research Program of China (No.2012CB417002) and the National Natural Science Foundation of China (No.51009096).
  • Received Date: 2012-10-22
  • Publish Date: 2013-11-25

Abstract: Some of the natural incised river channels have unique features in fluvial morphology and longitudinal profiles. In this study, the relevant mechanisms of fluvial morphology during incision and their influence on longitudinal profiles are investigated through field surveys, and the use of data analysis and geographic information system (GIS) techniques. Results show that there exists a loss and compensatory mechanism of sediment transport in response to riverbed incision, which is an important factor driving this type of river systems towards a state of equilibrium. After deepening, riverbed sediments consume more erosive energy and sustain high gradient channels, leading to special longitudinal profiles. River discharge and riverbed sediment are the dominant elements controlling the formation of longitudinal profiles. After introducing a dimensionless parameter derived from river discharge and riverbed sediment, the channel gradient and the new dimensionless parameter shows a good linear relationship.

LIU Huaixiang, WANG Zhaoyin, LU Yongjun, YU Guo'an. Riverbed sediment response and longitudinal profile adjustment in incised river channels[J]. Advances in Water Science, 2013, 24(6): 836-841.
Citation: LIU Huaixiang, WANG Zhaoyin, LU Yongjun, YU Guo'an. Riverbed sediment response and longitudinal profile adjustment in incised river channels[J]. Advances in Water Science, 2013, 24(6): 836-841.
shu

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