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- W2393078260 abstract "Hydraulic conductivity K of streambed sediments is one of the most important hydrogeological parameters,which may influences the conversion relationship between river and groundwater. The vertical hydraulic conductivity Kvof the sediment column is determined using a falling-head permeameter test of three different cross sections in the lower reaches of the Luanhe river. About 32 points were tested and the results suggest that( Ⅰ) The vertical hydraulic conductivity Kvof the sediment ranges from 0. 17 to 2. 93 m / d, approximately obeys the normal distribution;( Ⅱ) Along different geomorphic unit( alluvial plain-marine plain-estuary),the river bed cross section and in a small scope of 1 m2,the values of Kvhave an obvious differences,the degree of variation increases from alluvial plain to estuary,demonstrating that the penetrating quality of the streambed sediment has a strong variability in space;( Ⅲ) Kvon both sides of the river is lower than on the center,and in a relative short flow path Kvis almost constant along the river flow. Particle analysis results show that the sediment particle size and distribution are the main causes of differences between the coefficient of permeability,and the hydraulic process of river and groundwater in the hyporheic zone may enlarge the porosity and permeability of the streambed sediment,leading to improvement of the penetration ability. Furthermore,the muddy layer will also greatly decrease the penetration of the sediments and weaken the water exchange capacity between river and groundwater. The results of this paper provides the theoretical and data support for the study of the conversion relationship between river and groundwater of the Luanhe River." @default.
- W2393078260 created "2016-06-24" @default.
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- W2393078260 date "2014-01-01" @default.
- W2393078260 modified "2023-09-23" @default.
- W2393078260 title "Spatial variability of streambed hydraulic conductivity in the lower reaches of the Luanhe River" @default.
- W2393078260 hasPublicationYear "2014" @default.
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