Estimating 1970-99 average annual groundwater recharge in Wisconsin using streamflow data
Open-File Report
2009-1210
By: Warren A. Gebert, John F. Walker, and James L. Kennedy
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Abstract
Average annual recharge in Wisconsin for the period 1970-99 was estimated using streamflow data from U.S. Geological Survey continuous-record streamflow-gaging stations and partial-record sites. Partial-record sites have discharge measurements collected during low-flow conditions. The average annual base flow of a stream divided by the drainage area is a good approximation of the recharge rate; therefore, once average annual base flow is determined recharge can be calculated. Estimates of recharge for nearly 72 percent of the surface area of the State are provided. The results illustrate substantial spatial variability of recharge across the State, ranging from less than 1 inch to more than 12 inches per year. The average basin size for partial-record sites (50 square miles) was less than the average basin size for the gaging stations (305 square miles). Including results for smaller basins reveals a spatial variability that otherwise would be smoothed out using only estimates for larger basins. An error analysis indicates that the techniques used provide base flow estimates with standard errors ranging from 5.4 to 14 percent.
Suggested Citation
Gebert, W.A., Walker, J.F., Kennedy, J.L., 2011, Estimating 1970-99 average annual groundwater recharge in Wisconsin using streamflow data: U.S. Geological Survey Open-File Report 2009-1210, iv, 13 p.; Appendices, https://doi.org/10.3133/ofr20091210.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Estimating 1970-99 average annual groundwater recharge in Wisconsin using streamflow data |
| Series title | Open-File Report |
| Series number | 2009-1210 |
| DOI | 10.3133/ofr20091210 |
| Year Published | 2011 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Wisconsin Water Science Center |
| Description | iv, 13 p.; Appendices |
| Time Range Start | 1969-10-01 |
| Time Range End | 1999-09-30 |
| Country | United States |
| State | Wisconsin |