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Hydraulic performance of a skewed two-stage flood channel

 

作者: R. H. J. Sellin,  

 

期刊: Journal of Hydraulic Research  (Taylor Available online 1995)
卷期: Volume 33, issue 1  

页码: 43-64

 

ISSN:0022-1686

 

年代: 1995

 

DOI:10.1080/00221689509498683

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

This paper presents the results of an experimental investigation carried out in the UK Flood Channel Facility into the hydraulics of overbank river flow (two-stage channels). This large experimental channel can accommodate models up to 60 m in length. The topic investigated here concerns straight river channels flanked by skewed floodplains. Angles of skew over the range 2° to 9° and overbank depth ratios from 0.15 to 0.49 were studied. Friction characteristics are derived from the measured stage-discharge curves and compared with the equivalent straight (unskewed) two-stage channels as well as simple trapezoidal ones. Distributions of both transverse and longitudinal velocity components as well as bed shear stress are presented and discussed. Inferred secondary circulation systems in the deep channel are proposed and related to the measured hydraulic characteristics of the flow.

 

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