渗流仪装置结构对潜流交换的影响研究  

Influence of the Seepage Meter Structure on Hyporheic Exchange

作　　者：陈斌[1] 吕辉[1] CHEN Bin;LV Hui(Jiangxi Provincial Institute of Water Sciences , Nanchang, Jiangxi 330029, Chin)

机构地区：[1]江西省水利科学研究院,江西南昌330029

出　　处：《水利与建筑工程学报》2018年第2期232-236,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助项目(51279045)

摘　　要：为揭示渗流仪的不同装置结构对潜流交换的影响,通过自行设计渗流仪装置,采用室内水槽实验与数值模拟相结合的方法,分析研究了不同装置结构对河床界面压力分布及区域潜流量的影响规律。结果表明,三角形形状的渗流仪收集到的潜流量随地表水流条件的变化符合一般规律;渗流仪装置的凸起高度Δh会增大装置上下游区域内的总水头和河床界面上的潜流量,并且随着Δh的增大效果越明显,其影响程度也随着与装置距离的增大而降低;渗流仪装置插入河床深度的不同会影响该区域的潜流量的测量,潜流量均随着上下游两侧插入深度的增大而减少。In order to test the impacts of the different seepage meter structures on the hyporheic exchange,we designed a seepage meter.By comparing the experiment results with numerical simulation results,the influence of the different seepage meter structure on the surface pressure distribution of the river bed and the hyporheic exchange is analyzed.The result shows that the hyporheic flux collected by triangle shape of the seepage meter changes with the surface of the flow conditions consistent with the usual law.The height of the seepage meter will increase the total pressure and the hyporheic flux,and the effect is more obvious with the increase of the height of the seepage meter,and the degree of influence will decrease as the distance increasing from the seepage meter.The difference in the depth of the seepage meter into the bed will affect the measurement of the hyporheic flux in the area,and the hyporheic flux will decrease with the increase of insertion depth on both sides of the upstream and downstream of the seepage meter.

关 键 词：潜流交换 水槽试验 压力分布 潜流量 

分 类 号：TV131.66[水利工程—水力学及河流动力学]