水科学进展2013，Vol.24Issue(1)：118-124,7.
弯曲河岸侧向潜流交换试验
Laboratory experiments on lateral hyporheic exchange in riverbanks with curved bank morphology
摘要
Abstract
As an important component of stream-subsurface exchange processes, lateral hyporheic exchange plays a crucial role in maintaining health of river and riparian ecosystems. In order to reveal the discipline of lateral hyporheic exchange induced by bank morphology, 10 runs of circulation flume experiments with idealized sinusoidal curved bank and 4 runs of comparison experiments with straight bank were conducted in varying flow conditions. The experimental results showed that the lateral hyporheic exchange also consisted of advection (pumping exchange) , diffusion and micro-circulation, which was similar to the vertical hyporheic exchange. The increasing stream Reynolds Number Re intensified the effect of diffusion and micro-circulation. The presence of curved bank morphologies produced additional exchange under all flow conditions. With increasing bank amplitude and flow velocity, the pumping exchange ( advec-tive exchange) gradually became the main exchange pattern in the earth time of hyporheic exchange.关键词
河岸/水槽试验/潜流交换/侧向/泵吸效应Key words
banks/ flume experiments/ hyporheic exchange/ lateral/ pumping exchange分类
建筑与水利引用本文复制引用
林俊强,严忠民,夏继红..弯曲河岸侧向潜流交换试验[J].水科学进展,2013,24(1):118-124,7.基金项目
国家自然科学基金资助项目(40871050) （40871050）
江苏省研究生科研创新项目(CX10B-212Z) （CX10B-212Z）
