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Semianalytical Solutions for Stream Depletion in Partially Penetrating Streams
Author(s) -
Chen Xunhong,
Yin Yanfeng
Publication year - 2004
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2004.tb02454.x
Subject(s) - streams , modflow , aquifer , infiltration (hvac) , stream flow , hydraulic head , base flow , environmental science , hydrology (agriculture) , drawdown (hydrology) , pressure head , groundwater , geology , groundwater flow , geotechnical engineering , computer science , physics , thermodynamics , drainage basin , computer network , cartography , geography
In the analysis of streamflow depletion, the Hunt (1999) solution has an important advantage because it considers a partially penetrating stream. By extending the Hunt drawdown solution, this paper presents semianalytical solutions for gaining streams that evaluate the induced stream infiltration and base flow reduction separately. Simulation results show that for a given δh (the initial hydraulic head difference between stream and aquifer beneath the channel), the base flow reduction is in direct proportion to the product of streambed leakage (λ) and the distance between pumping well and stream (L), and the induced stream infiltration is in inverse proportion to λL. Δh has a significant effect on the ratio of stream infiltration to base flow reduction. The results from the semianalytical solutions agree well with those from MODFLOW simulations. The semianalytical solutions are useful in the verification of numerical simulations and in the analysis of stream‐aquifer interactions where water quantity or quality is concerned.