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

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

doi:10.5194/hess-19-4531-2015

Articles | Volume 19, issue 11

https://doi.org/10.5194/hess-19-4531-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-19-4531-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 19, issue 11

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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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.