Scientific Investigations Report 2007–5041
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5041
Hydrogeologic Framework and Ground-Water Budget of the Spokane Valley-Rathdrum
Prairie Aquifer, Spokane County, Washington, and Bonner and Kootenai Counties,
Idaho
Prepared in cooperation with the
Idaho Department of Water Resources and
the
Washington State Department of Ecology
By Sue C. Kahle and James R. Bartolino
Table of Contents
Conversion Factors and Datums
Abstract
Introduction
Hydrogeologic Framework
Ground-Water Budget
Data Needs
Summary
Acknowledgments
References Cited
Appendix A. Highland and Side
Valley Inflow Estimates, By Jon E. Hortness
Figures
Figure 1. Location of the Spokane Valley-Rathdrum
Prairie aquifer, Spokane County, Washington, and Bonner and Kootenai Counties,
Idaho.
Figure 2. Generalized land cover and
land use in the Spokane Valley-Rathdrum Prairie aquifer study area, Spokane
County, Washington, and Bonner and Kootenai Counties, Idaho.
Figure 3. Average annual precipitation
based on 30 years of record, 1961–90, in the Spokane Valley-Rathdrum Prairie
aquifer study area, Spokane County, Washington, and Bonner and Kootenai Counties,
Idaho. (Data obtained from Oregon State University, 2005.)
Figure 4. Well-numbering systems used
in Washington and Idaho.
Figure 5. Extent of glacial ice and
glacial lakes in northern Washington, Idaho, and parts of Montana. (Modified
from Allen and Burns, 1986, and Atwater, 1986.)
Figure 6. Simplified conceptual model
of hydrologic conditions in the Spokane Valley-Rathdrum Prairie aquifer and
surrounding hydrogeologic units, Spokane County, Washington, and Bonner and
Kootenai Counties, Idaho.
Figure 7. Approximate location and
altitude of the top of the fine-grained layer in the Hillyard Trough and Little
Spokane River Arm of the Spokane Valley–Rathdrum Prairie aquifer, Spokane County,
Washington.
Figure 8. Locations of wells with and
without fine-grained deposits within the Rathdrum Prairie part of the Spokane
Valley-Rathdrum Prairie aquifer, Bonner and Kootenai Counties, Idaho.
Figure 9. Approximate altitude of the
base of the Spokane Valley–Rathdrum Prairie aquifer, Spokane County, Washington,
and Bonner and Kootenai Counties, Idaho.
Figure 10. Approximate thickness of
the Spokane Valley-Rathdrum Prairie aquifer, Spokane County, Washington, and
Bonner and Kootenai Counties, Idaho.
Figure 11. Estimated ground-water
budget components for the Spokane Valley-Rathdrum Prairie aquifer for average
conditions, 1990–2005, Spokane County, Washington, and Bonner and Kootenai Counties,
Idaho. An inset chart shows values for individual lakes.
Tables
Table 1. Geologic time scale with simplified
geologic units of the Spokane Valley-Rathdrum Prairie aquifer study area, Spokane
County, Washington, and Bonner and Kootenai Counties, Idaho.
Table 2. Estimated ground-water budget
for the Spokane Valley-Rathdrum Prairie aquifer for average conditions 1990–2005,
Spokane County, Washington, and Bonner and Kootenai Counties, Idaho.
Table 3. Physical data for wells used
in the characterization of the hydrogeologic system of the Spokane Valley-Rathdrum
Prairie aquifer study area, Spokane County, Washington, and Bonner and Kootenai
Counties, Idaho.
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Send questions or comments about this report to the authors, S.C. Kahle, (253) 552-1616, and J.R. Bartolino, (208) 387-1392.
For more information about USGS activities in Washington, visit the USGS
Washington Water Science Center home page.
U.S.
Department of the Interior | U.S. Geological
Survey
