Although Wisconsin has extensive hydrologic data at multiple spatial and temporal scales, to date no one has taken on the task of synthesizing these data in a framework suitable for producing estimates of recharge rate. As a result, maximal use of these data sets, and an improved understanding of the processes that control recharge in humid regions, have not been realized.

Objectives:

(1) Estimate statewide recharge rates to shallow aquifers by basin;
(2) Determine trends in recharge rates; and
(3) Investigate dominant recharge processes occurring in select undeveloped, agricultural, and urban watersheds.

Approach:

The approaches used include regression modeling of baseflow, coupled with groundwater-surface water modeling, and investigation into the temporal and spatial distribution of recharge in Wisconsin. A second area of work will involve analysis of the long-term Ground Water Observation Well database for climate trends and effects of oceanic climate signals.

Data:

Miscellaneous Measurements Database

Publications:

Magnuson, J.J., Krohelski, J.T., Kunkel, K.E., and Robertson, D.M., 2003, Wisconsin's waters and climate: Historical changes and possible futures. Wisconsin Academy of Sciences, Arts and Letters Transactions 92: 23-36.

Juckem, P.F., Hunt, R.J., and Anderson, M.P., in press, Evaluating scale thresholds for parameter variability in the Driftless Area of Wisconsin. Ground Water.

Funding:

The funding for the recharge project is from the Office of Ground Water, Ground-Water Resources Program.

For technical assistance on this project, please contact Randy Hunt at (608) 821-3847.

U.S. Department of the Interior | U.S. Geological Survey
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