During the past 50 or 60 years piezometric levels of the basaltic aquifers of the Pullman-Moscow basin have been declining at rates varying from 1 to 5 feet per year. The indicated withdrawals from storage in the basin and the apparent deterioration of municipal water quality at Moscow have been subjects of increasing concern. Research studies of the ground-water basin have been conducted for many years, principally by the U.S.G.S., the University of Idaho and Washington State University. In the past few years these efforts have been expanded because of the establishment of Water Research Centers at both Universities. At the present time a cooperative program is being conducted, the aims of which are to determine the mechanisms of natural recharge to the basin. Although these studies are being coordinated each University is approaching the problem independently and most of the findings are in substantial agreement. There are certain points, however, on which the data appear to be contradictory. During the past several years Washington State University has conducted a series of seismic studies in the Moscow subbasin utilizing both refraction and reflection techniques. The studies were directed toward determining the configuration of the pre-Tertiary drainage system and the stratigraphic relationships between the basalts and the Latah formation. The ground-water system, proper, has been investigated by both carbon-14 and tritium dating techniques. Although these studies are continuing, the results obtained thus far indicate these methods may be a valuable hydrologic research tool in basaltic terrantes. Much of the present ground-water body appears to have been in storage by the closing phases of the glacial period. Ground-water levels apparently declined until the thermal maximum after which time the reservoir slowly filled to its known level in the 1890's. /Author/

  • Corporate Authors:

    Engineering Geology & Soils Engineering Symposium

    P. O. Box 7129, 3211 State Street
    Boise, ID  United States  83707
  • Authors:
    • Crosby III, J W
  • Conference:
  • Publication Date: 1966

Media Info

  • Pagination: p. 16

Subject/Index Terms

Filing Info

  • Accession Number: 00263788
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM