A quantitative analysis of hydraulic interaction processes in stream-aquifer systems

Scientific Reports
Wenke WangLin Zhu

Abstract

The hydraulic relationship between the stream and aquifer can be altered from hydraulic connection to disconnection when the pumping rate exceeds the maximum seepage flux of the streambed. This study proposes to quantitatively analyze the physical processes of stream-aquifer systems from connection to disconnection. A free water table equation is adopted to clarify under what conditions a stream starts to separate hydraulically from an aquifer. Both the theoretical analysis and laboratory tests have demonstrated that the hydraulic connectedness of the stream-aquifer system can reach a critical disconnection state when the horizontal hydraulic gradient at the free water surface is equal to zero and the vertical is equal to 1. A boundary-value problem for movement of the critical point of disconnection is established for an analytical solution of the inverted water table movement beneath the stream. The result indicates that the maximum distance or thickness of the inverted water table is equal to the water depth in the stream, and at a steady state of disconnection, the maximum hydraulic gradient at the streambed center is 2. This study helps us to understand the hydraulic phenomena of water flow near streams and accurately asse...Continue Reading

References

Mar 1, 1977·The British Journal of Ophthalmology·R M BurdeJ L Keltner
Nov 7, 2009·Ground Water·Philip BrunnerRené Therrien
Sep 21, 2010·Ground Water·Philip BrunnerCraig T Simmons
Sep 17, 2013·Ground Water·Yueqing XieCraig T Simmons

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Citations

Oct 11, 2017·Environmental Science and Pollution Research International·Sujay Raghavendra NagannaWilliam F Hansen

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