Ecological cross section rehabilitation in Fenghui Main Canal

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Fang, T.Y.^1 ; Liu, H.T.^2 ; Liu, X.D.^1 ; He, X.L.^1 ; Chen, J.^3 ; Han, Y.^1

College of Water Resources and Civil Engineering, China Agricultural University, 17 Tsinghua East Rd, Beijing

100083, China^1

College of Water and Environmental Engineering, Changchun Institute of Technology, Changchun

130012, China^2

College of Engineering, China Agricultural University, 17 Tsinghua East Rd, Beijing

100083, China^3

关键词: Ecological rehabilitation;    Hydraulic characteristic;    Hydraulic radius;    Momentum balances;    Physical model test;    Resistance parameters;    Smallest energies;    Theoretical values;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012085/pdf
DOI  :  10.1088/1755-1315/191/1/012085

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to rehabilitate the optimal cross section of the Fenghui main canal, this paper developed some ecological rehabilitation plans based on the original canal cross section and the vegetation is arranged in both boundary and bottom of channel. The physical model test was carried out to study resistance parameters for flow over vegetation. By analyzing the value of section mean roughness under different design schemes, the energy loss and cost corresponding to each reconstruction scheme can be compared. The results show that: based on momentum balance principle and improved hydraulic radius model, the theoretical value and measurements from load cell are quite similar. Meanwhile, the optimal vegetation lay-out in cross section based on smallest energy loss and best hydraulic characteristics can be determined. From the perspective of project cost analysis, it is recommended to select the cross-pavement ecological vegetation scheme from the aspects of hydraulic characteristics and economics.