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Evaluation of Long-Term Water-Level Declines in Basalt Aquifers near Moiser, Oregon
David S. Morgan
(Author)
·
Karl K. Lee
(Author)
·
Erick R. Burns
(Author)
·
Createspace Independent Publishing Platform
· Paperback
Evaluation of Long-Term Water-Level Declines in Basalt Aquifers near Moiser, Oregon - Morgan, David S. ; Lee, Karl K. ; Burns, Erick R.
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Synopsis "Evaluation of Long-Term Water-Level Declines in Basalt Aquifers near Moiser, Oregon"
The Mosier area lies along the Columbia River in northwestern Wasco County between the cities of Hood River and The Dalles, Oregon. Major water uses in the area are irrigation, municipal supply for the city of Mosier, and domestic supply for rural residents. The primary source of water is groundwater from the Columbia River Basalt Group (CRBG) aquifers that underlie the area. Concerns regarding this supply of water arose in the mid-1970s, when groundwater levels in the orchard tract area began to steadily decline. In the 1980s, the Oregon Water Resources Department (OWRD) conducted a study of the aquifer system, which resulted in delineation of an administrative area where parts of the Pomona and Priest Rapids aquifers were withdrawn from further appropriations for any use other than domestic supply. Despite this action, water levels continued to drop at approximately the same, nearly constant annual rate of about 4 feet per year, resulting in a current total decline of between 150 and 200 feet in many wells with continued downward trends.
