By Charles A. Collins and Tyson M. Broad
USGS Water-Resources Investigations Report 96-4111, 27 pages, 6 figures, 1 table
AbstractGround-water pumpage for 1990 was estimated for an area of about 5,700 square miles in northwestern Oregon and southwestern Washington as part of the Puget-Willamette Lowland Regional Aquifer System Analysis study. The estimated total ground-water pumpage in 1990 was about 340,000 acre-feet. Ground water in the study area is pumped mainly from Quaternary sediment; lesser amounts are withdrawn from Tertiary volcanic materials. Large parts of the area are used for agriculture, and about two and one-half times as much ground water was pumped for irrigation as for either public-supply or industrial needs. Estimates of ground-water pumpage for irrigation in the central part of the Willamette Valley were generated by using image-processing techniques and Landsat Thematic Mapper data. Field data and published reports were used to estimate pumpage for irrigation in other parts of the study area. Information on public-supply and industrial pumpage was collected from Federal, State, and private organizations and individuals.
This report is available online. Please visit our Online Publications page.
The printed version of the full report is available free (while supplies last) from:
U.S. Geological Survey, 10615 S.E. Cherry Blossom Drive, Portland, OR 97216 (ph: 503-251-3201, e-mail email@example.com)
and (at a nominal charge) from:
U.S. Geological Survey, Information Services, Box 25286, Denver, CO 80225 (ph: 1-888-ASK-USGS, e-mail firstname.lastname@example.org).
Note: When ordering the report, please supply the report title and number, your name, and your mailing address. Thank you.
U.S. Geological Survey http://oregon.usgs.gov/pubs_dir/Abstracts/96-4111.html