Articles | Volume 19, issue 11
https://doi.org/10.5194/hess-19-4531-2015
https://doi.org/10.5194/hess-19-4531-2015
Research article
 | 
12 Nov 2015
Research article |  | 12 Nov 2015

Nonlinear effects of locally heterogeneous hydraulic conductivity fields on regional stream–aquifer exchanges

J. Zhu, C. L. Winter, and Z. Wang

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Cited articles

Bruen, M. P. and Osman, Y. Z.: Sensitivity of stream–aquifer seepage to spatial variability of the saturated hydraulic conductivity of the aquifer, J. Hydrol., 293, 289–302, 2004.
Chen, X. and Shu, L.: Groundwater evapotranspiration captured by seasonally pumped wells in river valleys, J. Hydrol., 318, 334–347, 2006.
Christensen, S., Rasmussen, K. R., and Moller, K.: Prediction of regional ground water flow to streams, Ground Water, 36, 351–360, 1998.
Doherty, J., Brebber, L., and Whyte, P.: Model-independent Parameter Estimation, Watermark Numerical Computing, Brisbane, Australia, 1994.
Dragoni, W., Mottola, A., and Cambi, C.: Modeling the effects of pumping wells in spring management: the case of Scirca spring (central Apennines, Italy), J. Hydrol., 493, 115–123, 2013.
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Short summary
Computation experiments found the effects of small-scale heterogeneities do influence estimates of aquifer--stream exchanges. The effects are nonlinear in the sense that simulated discharges from aquifers to streams are systematically lower than discharges produced by a base model parameterized with coarse effective K. Although aquifer heterogeneities are uncorrelated at local scales, they appear to induce coherent slow-paths in groundwater fluxes that in turn reduce aquifer-stream exchanges.