Spatial variability of streambed vertical hydraulic conductivity and its relation to distinctive stream morphologies in the Beiluo River, Shaanxi Province, China

摘要: Streambed vertical hydraulic conductivity (K v) is a key parameter in the analysis of interactions between streams and aquifers, stream ecosystems. However, knowledge streambed associated with different morphologies relatively scarce. An in-situ standpipe permeameter test method was used to determine spatial variability K v measured along 18.5 km reach Beiluo River, Shaanxi Province, China. The 59 total measurements were conducted at four sites three morphologies: straight channel, anabranching channels nearby meander bend. There great among distribution patterns can be determined: (1) higher values appear on erosional bank contrast lower depositional two near bends; (2) shows that occur center channel; (3) are generally highest branch more alluvial forms channels. Moreover, grain-size results illustrate average distributions sediments significantly each side channel. one driving dynamics for grain size trigger differences v.