Scientific Investigations Report 2007–5041
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5041
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.
[Abbreviations: ft3/s, cubic foot per second]
| Component | Rate (ft3/s) | Subcomponent or description | Rate (ft3/s) | Source |
|---|---|---|---|---|
| Inflow to aquifer | ||||
| Spokane River | 718 | Spokane River near Coeur d’Alene Lake to Flora Road | 606 | Aug. 27–Sept. 1, 2005 streamflow measurements |
| Spokane River below Greene Street at Spokane gage | 112 | |||
| Lakes | 287 | Hayden | 62 | L. Murray (University of Idaho, written commun., March 3, 2006) |
| Pend Oreille | 50 | Frink (1964), Pluhowski and Thomas (1968), McQueen and Nace (1970), Drost and Seitz (1978), Painter (1991) | ||
| Spirit | 48 | L. Murray (University of Idaho, written commun., March 3, 2006) | ||
| Coeur d’Alene | 37 | Sagstad (1977) | ||
| Twin | 35 | L. Murray (University of Idaho, written commun., March 3, 2006) | ||
| Newman | 20 | |||
| Hauser | 17 | |||
| Fernan | 13 | |||
| Liberty | 5 | |||
| Areal recharge | 233 | Total | – | B.A. Contor (Idaho State University, written commun., April 20, 2006 and July 19, 2006); P.A. Hsieh (U.S. Geological Survey, written commun., December 6, 2006); Bartolino (2007) |
| Tributary recharge | 112 | Total | – | Hortness (this volume) |
| Infiltration of ground water applied at land surface | 77 | Landscape irrigation | 54 | B.A. Contor (Idaho State University, written commun., January 15, 2007) |
| Septic systems | 23 | |||
| Spirit Valley | 44 | Total | – | L. Murray (University of Idaho, written commun., March 3, 2006) |
| Total inflow: | 1,471 | |||
| Outflow from aquifer | ||||
| Spokane River | 861 | Spokane River at Flora Road to below Greene Street | 593 | Aug. 27–Sept. 1, 2005 streamflow measurements |
| Spokane River at Spokane gage to below Nine Mile Dam | 268 | |||
| Pumpage | 318 | Public supply | 205 | M.A. Maupin (U.S.Geological Survey, written commun., January 4, 2006), |
| Self-supplied Industrial | 34 | |||
| Irrigation (outside purveyor service areas) | 51 | B.A. Contor (Idaho State University, written commun., January 15, 2007) | ||
| Domestic supply wells (outside purveyor service areas) | 28 | |||
| Little Spokane River | 232 | Little Spokane R. below “At Dartford” gaging station | Aug. 27–Sept. 1, 2005 streamflow measurements | |
| Subsurface outflow | 55 | Flow to Long Lake | Drost and Seitz (1978) | |
| Infiltration of ground water into sewers | 2.3 | Total | L. Brewer (City of Spokane, written commun., February 8, 2006) | |
| Total outflow: | 1,468 | |||
| Totals | ||||
| Total inflow: | 1,471 | |||
| Total outflow: | 1,468 | |||
| Difference: | -2.7 | 0.2 percent | ||
U.S.
Department of the Interior | U.S. Geological
Survey
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