scholarly journals Downstream hydraulic geometry relations: 2. Calibration and testing

2003 ◽  
Vol 39 (12) ◽  
Author(s):  
Vijay P. Singh ◽  
Chih Ted Yang ◽  
Zhi-Qiang Deng
Keyword(s):  
Hydraulic Geometry ◽  
Downstream Hydraulic Geometry

Downstream hydraulic geometry relationships: Gathering reference reach-scale width values from LiDAR

Geomorphology ◽  
2015 ◽  
Vol 250 ◽  
pp. 236-248 ◽  
Author(s):  
G. Sofia ◽  
P. Tarolli ◽  
F. Cazorzi ◽  
G. Dalla Fontana
Keyword(s):  
Hydraulic Geometry ◽  
Downstream Hydraulic Geometry

scholarly journals Impacts of Massive Sediment Input on the Channel Geometry Adjustment of Alluvial Rivers: Revisiting the North Fork Toutle River Case

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2802
Author(s):  
Xiaofan Wang ◽  
Xudong Ma ◽  
Xingnian Liu
Keyword(s):  
Sediment Transport ◽  
Hydraulic Geometry ◽  
Medium Term ◽  
Channel Geometry ◽  
Channel Adjustment ◽  
The North ◽  
Water And Sediment ◽  
North Fork ◽  
Sediment Input ◽  
Downstream Hydraulic Geometry

In this study, the impacts of massive sediment input on channel geometry adjustment were analyzed across decades based on the downstream hydraulic geometry. Massive amounts of field data and evolution models showed that the alternation of degradation and aggradation in short-to-medium-term channel adjustment is common in evolving rivers. This phenomenon has always been challenging in research; most existing studies have focused on unidirectional adjustment in short-term channel adjustment. A few studies have considered the alternation of degradation and aggradation in short-to-medium-term channel adjustment, presuming that this phenomenon is caused by water and sediment changes. However, we found that the alternations also occurred under stable water and sediment transport in the North Fork Toutle River, southwestern Washington, USA. This adjustment across decades was analyzed by downstream hydraulic geometry in this study. It was concluded that the river consumes surplus energy to reach the optimal cross section through this short-to-medium-term adjustment under stable water and sediment transport. The objective of channel adjustment is minimal energy loss.

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