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Impact of geometric features of impermeable discrete bedform on hyporheic exchange: 《Water Science and Engineering》2024年第4期388-396,共9页Xue-yong Wang Jing-yu Fan; supported by the National Natural Science Foundation of China(Grant No.11472168).; The bedform-driven hyporheic exchange plays a crucial role in mass transport within natural aquatic ecosystems like streams and rivers. This study aimed to unveil the impact of geometric features of impermeable discre...; 关键词：Hyporheic exchange Effective diffusion coefficient Discrete bedform Geometric feature Turbulence penetration Pumping exchange

Flow resistance in the channel-bar landscape of large alluvial rivers: 《Frontiers of Earth Science》2024年第2期412-421,共10页Yong HU Congcong LIU Jinyun DENG Wei ZHANG Yitian LI; Accurate approaches for estimating flow resistance in large alluvial rivers are fundamental for simulating discharge,sediment transport,and flood routing.However,methods for estimating riverbed resistance and addition...; 关键词：flow resistance channel-bar landscape interaction region large river BEDFORM

Characterizing and identifying bedforms in the wandering reach of the lower Yellow River被引量：6: 《International Journal of Sediment Research》2022年第1期110-121,共12页Yuanfeng Zhang Ping Wang Guanqing Shen; supported by the National Research and Development Program of China(Grant No.2017YFC0405505);Basic Research Fund for Central Public Interest Scientific Institutes(Grant No.HKY-JBYW-2017-07);the National Natural Science Foundation of China(Grant No.51379087).; The lower Yellow River(LYR)is a fully alluvial system with a fine-grained bed that has a high proportion of silt.Bathymetric survey data collected with a Multi-Beam Echo Sounder(MBES)from the wandering reach of the LY...; 关键词：Bedform discrimination Two-scales of dunes Alluvial resistance The lower Yellow River

Sediment bed destabilization by an isolated vortex:an experimental approach: 《Journal of Hydrodynamics》2021年第2期370-385,共16页Yann Devaux Lionel Thomas Damien Calluaud Gérard Pineau; The destabilization of an erodible sediment bed by a reproducible impulsive phenomenon is studied experimentally.For this,a specific setup is designed to produce a well-controlled isolated vortex,advected over a unifo...; 关键词：SEDIMENT plume ISOLATED VORTEX stereo-correlation particle image velocimetry(PIV) BEDFORM dynamics

Impacts of vegetation over bedforms on flow characteristics in gravel-bed rivers: 《Journal of Hydrodynamics》2019年第5期986-998,共13页Hossein Afzalimehr Mohammad Reza Maddahi Jueyi Sui Majid Rahimpour; In the present study,among six gravel-bed river reaches,two natural gravel-bed river reaches with approximately similar bedforms and flow conditions have been found,one river reach with vegetation on bedforms and the ...; 关键词：BEDFORM REYNOLDS SHEAR stress distribution TURBULENCE intensity VEGETATION velocity profiles

Bedform development and its effect on bed stabilization and sediment transport based on a flume experiment with non-uniform sediment被引量：1: 《International Journal of Sediment Research》2017年第3期305-312,共8页Su-Chin Chen Chia-Ning Yang Ching-Ying Tsou; National Science Council of Taiwan for funding this research under Contract NSC No.101-2313-B-005-007-MY3; Non-uniform sediment deposited in a confined, steep mountain channel can alter the bed surface composition. This study evaluates the contribution of geometric and resistance parameters to bed stabilization and the red...; 关键词：Bedform development Bed stabilization Sediment transport Non-uniform bed

The bedform morphology of Chinese sturgeon spawning sites in the Yangtze River被引量：4: 《International Journal of Sediment Research》2013年第3期421-429,共9页Yu-jun YI Shang-hong ZHANG Zhao-yin WANG; financially supported by the National Natural Science Foundation of China(No.50939001 and No.51279220);the Nonprofit Environment Protection Specific Project of China(No.201209029-4); Quantitative measures of the relationships between channel morphology and the habitat use of Chinese sturgeon （Acipenser sinensis） can help management and regulatory agencies to quantify potential spawning habitats ...; 关键词：Riverbed morphology Pool-riffle units Slope Aspect Chinese sturgeon

Extraction of Morphometric Bedform Characteristics from Profiling Sonar Datasets Recorded in Shallow Coastal Waters of China被引量：1: 《China Ocean Engineering》2012年第3期469-482,共14页黄瀚汪亚平高抒陈坚杨旸高建华; supported by the National Natural Science Foundation of China (Grant Nos. 40876043,40976051 andJ1103408);Public Science and Technology Research Funds Projects of Ocean (Grant No. 201105001-2);the Priority Academic Program Development of Jiangsu Higher Education Institutions fund; The morphological characteristics of small-scale bedforms were measured by means of an acoustic profiling sonar on the Dafeng tidal flat, Jiangsu, in 2009, and in the Jiulong Estuary, Xiamen, in 2010, respectively. T...; 关键词：ripple profiling sonar BEDFORM seabed roughness fractal dimension variogram method tidal flat Jiulong Estuary

MORPHOLOGY AND GROWTH PATTERNS OF THE USRI RIVER POINT BARS, BIHAR, INDIA: 《International Journal of Sediment Research》2000年第4期445-457,共13页Barendra PURKAIT ( This work was completed at the Flume Laboratory, Indian Statistical Institute, Calcutta, E-mail: bijoy@isical.ac.in Senior Geologist, Map & Cartography Division, Geological Survey of India, 29, J.L. Nehru Road, Calcutta 700 016, INDI; Morphology and growth patterns of four point bars of the river Usri, Bihar, India were studied by plane table mapping for two to three successive years before and after the monsoon. In plan, all these bars are crescen...; 关键词：MORPHOLOGY Growth pattern Point bar Longitudinal profile Avalanche face Cross-stratification BEDFORM

Free Boundary Problem in Bedform Evolution of Alluvial River System: 《Tsinghua Science and Technology》1997年第3期114-116,共3页李栓虎杨铁笙; The bedform evolution in an alluvial river system is studied. A mathematical model is designed to simulate the flow in the water sand region and the bedform processes.The model results in a free boundary problem. ...; 关键词：bedform evolution free boundary problem entropy solution

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