EGU21-3819
https://doi.org/10.5194/egusphere-egu21-3819
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Morphological effects of a hydraulic lifting dam on the middle Fenhe River, China

Yufang Ni1, Zhixian Cao1, Wenjun Qi2, Xiangbin Chai2, and Aili Zhao2
Yufang Ni et al.
  • 1Wuhan University, School of Water Resources and Hydropower Engineering, Department of Harbor, Waterway and Coastal Engineering, Wuhan, China (yufangni@whu.edu.cn)
  • 2Authority of Fenhe River Basin of Shanxi Province, Taiyuan, China

Hydraulic lifting dams become increasingly popular in China for water storage, river landscaping and environmental restoration. Inevitably, dams influence riverine morphology. Unfortunately, current understanding of this topic has remained rather limited. Here, the morphological effects of a hydraulic lifting dam on the middle Fenhe River, China are investigated. This reach features a compound channel and floodplains, and the riverbed is mainly composed of silt that can be easily eroded, indicating potential significant bed deformation. A computationally efficient depth-averaged two-dimensional shallow water hydro-sediment-morphodynamic model is employed. Unstructured meshes are refined around dam structures to accurately present topography. The numerical predictions show discrepancies of morphological responses of the main channel and floodplains to different operation schemes of the hydraulic lifting dam. This work helps to support decisions on the management of hydraulic lifting dams on the middle Fenhe River and reveals a general pattern for the morphological impact of hydraulic lifting dam.

How to cite: Ni, Y., Cao, Z., Qi, W., Chai, X., and Zhao, A.: Morphological effects of a hydraulic lifting dam on the middle Fenhe River, China, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3819, https://doi.org/10.5194/egusphere-egu21-3819, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.