SOME NEW DATA AND FORMULAS FOR RESISTANCE FLOW IN FLUVIAL OPEN CHANNELS  

作　　者：YANG Sheng-fa HU Jiang LI Dan-xun WANG Xing-kui GUO Yakun 

机构地区：[1]Department of River and Ocean, Chongqing Jiaotong University, Chongqing 400074, China [2]State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China [3]School of Engineering, University of Aberdeen, Aberdeen, AB24 3UE, UK

出　　处：《Journal of Hydrodynamics》2011年第4期527-534,共8页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.50779082);the National Basic Research Program of China(973 Program,Grant No.2007CB407202);supported by the CSTC 2011

摘　　要：Flow resistance in fluvial open channels, especially in steep gravel-bed channels, still presents challenges to researchers and engineers. This article presents some new data from both the flume experiments and field measurements. Data analysis using the divided hydraulic radius approach shows that the relative roughness plays a significant role in the bed form resistance. A new set of formulas that incorporate the relative roughness are proposed. As compared with several existing formulas, the proposed formulas can be used to better estimate the bed form resistance.Flow resistance in fluvial open channels, especially in steep gravel-bed channels, still presents challenges to researchers and engineers. This article presents some new data from both the flume experiments and field measurements. Data analysis using the divided hydraulic radius approach shows that the relative roughness plays a significant role in the bed form resistance. A new set of formulas that incorporate the relative roughness are proposed. As compared with several existing formulas, the proposed formulas can be used to better estimate the bed form resistance.

关 键 词：open channel flow flow resistance relative roughness steep gravel-bed flume experiments field measurements 

分 类 号：U697[交通运输工程—港口、海岸及近海工程] S275[交通运输工程—船舶与海洋工程]