Overbank Flow in a Multi-Staged Open Channel: Zonal and Overall Discharge Studies  

作　　者：Prateek Kumar Singh Xiaonan Tang Hamidreza Rahimi Yutong Guan Prateek Kumar Singh;Xiaonan Tang;Hamidreza Rahimi;Yutong Guan(Department of Building Environment and Energy Engineering, Hong Kong Polytechnic University, Hong Kong, China;Department of Civil Engineering, Xi’an Jiaotong Liverpool University, Suzhou, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China)

机构地区：[1]Department of Building Environment and Energy Engineering, Hong Kong Polytechnic University, Hong Kong, China [2]Department of Civil Engineering, Xi’an Jiaotong Liverpool University, Suzhou, China [3]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China

出　　处：《Journal of Geoscience and Environment Protection》2023年第3期293-304,共12页地球科学和环境保护期刊（英文）

摘　　要：An improved divided channel method has been proposed by modelling a parameter using the function of depth ratio for a multi-stage compound channel. Experimental data suggest that as the flow depth increases over the second stage floodplain, fractional contribution of the main channel and first stage floodplain under bankfull height plays a pivotal role in shear layer and momentum distribution. Therefore, a new mathematical model has been suggested for estimating the stage-discharge relationship for staged channels of more than one floodplain using the 1D technique of overall roughness correction. .An improved divided channel method has been proposed by modelling a parameter using the function of depth ratio for a multi-stage compound channel. Experimental data suggest that as the flow depth increases over the second stage floodplain, fractional contribution of the main channel and first stage floodplain under bankfull height plays a pivotal role in shear layer and momentum distribution. Therefore, a new mathematical model has been suggested for estimating the stage-discharge relationship for staged channels of more than one floodplain using the 1D technique of overall roughness correction. .

关 键 词：Overbank Floodplains River Dynamics Asymmetric Channels Open-Channel Flows 

分 类 号：TV1[水利工程]