Bed roughness adjustments determined from fractal measurements of river-bed morphology  

作　　者：Yin-jun Zhou Jin-you Lu Li Chen Jie Ren 周银军;卢金友;陈立;任杰(Changjiang River Scientific Research Institute,Wuhan,430010,China;Three Gorges Water Conservancy Complex Cascade Dispatch ＆ Communication Center,Yichang 443000,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area,Xi＇an University of Technology,Xi＇an 710048,China)

机构地区：[1]Changjiang River Scientific Research Institute, Wuhan, 430010, China [2]Three Gorges Water Conservancy Complex Cascade Dispatch & Communication Center, Yichang 443000, China [3]State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China [4]State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi 'an 710048, China

出　　处：《Journal of Hydrodynamics》2018年第5期882-889,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 Nos.51579014,51339001 and 91647117);the National Key Research and Development of China(Grant No.2016YFC0402301-01)

摘　　要：The flow resistance in rivers is an old and partly unsolved problem. In this study, the bed surface fractal dimension（BSFD） is used to describe the bed morphology, and combined with the bed roughness, a general model experiment is developed. The results show that there is a positive relationship between the BSFD and the bed roughness, which can be further applied to estimate the roughness changes in rivers. These findings will also guide further studies of the mobile-bed flow resistance.The flow resistance in rivers is an old and partly unsolved problem. In this study, the bed surface fractal dimension（BSFD） is used to describe the bed morphology, and combined with the bed roughness, a general model experiment is developed. The results show that there is a positive relationship between the BSFD and the bed roughness, which can be further applied to estimate the roughness changes in rivers. These findings will also guide further studies of the mobile-bed flow resistance.

关 键 词：RIVER ROUGHNESS bed surface fractal dimension bed morphology 

分 类 号：TV143[水利工程—水力学及河流动力学]