ISSN:
1745-6584
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Energietechnik
,
Geologie und Paläontologie
Notizen:
Nonequilibrium pumping tests were performed at two widely separated sites consisting of one pumped and two observation wells each. The wells at both sites bottomed in the same stratigraphie formation; at one site a confined aquifer was tested, at the other the aquifer was unconfined. Data gathered from the tests were analyzed using the methods developed by Theis (1935), Jacob (1946), Chow (1952), and Hantush (1961). Eight separate determinations of transmissibility, permeability, and specific yield were made at each site. At the unconfined site, all eight determinations of permeability and transmissibility fell within nine percent of the mean of these calculated values. Specific yield predictions showed a wider variation, with individual computations differing by up to 55 percent from the mean at the confined site. No one method was found to yield consistently higher or lower values for the computed hydrologic characteristics; rather, the observation well used to make the analysis was found to have a more marked effect on the results obtained. Analysis of the well recovery curves confirmed the existence of local recharge near the test sites, explaining the apparent effect of the use of data from different observation wells on the analysis.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1745-6584.1971.tb03553.x
