Record Display for the EPA National Library Catalog


Main Title Computer and Physical Models for Solving Subsurface Problems in Hydrology.
Author Karad, Gabor M. ; Roderic, Gilbert L. ;
CORP Author Wisconsin Univ., Madison. Water Resources Center.
Year Published 1971
Report Number DI-14-01-0001-3050; OWRR-A-029-WIS; 03990,; A-029-WIS(2)
Stock Number PB-206 141
Additional Subjects ( Ground water ; Seepage) ; ( Partial differential equations ; Numerical integration) ; Computer programming ; Conformal mapping ; Complex variables ; Taylors series ; Flow rate ; Curve fitting ;
Library Call Number Additional Info Location Last
NTIS  PB-206 141 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 68p
The report discusses and evaluates different approaches to solving transient groundwater-flow problems associated with the two-dimensional drainage of a phreatic aquifer in a homogeneous isotropic soil, presents a new method to describe the transient flow under these conditions, and describes the experimental techniques used to evaluate the analytic solutions. Exact analytical treatment of the problem of groundwater flow toward tile drains or trenches is difficult because of the complicated non-linear boundary condition on the free surface. Based on the conformal mapping technique proposed by Kalinin, the cases of a single drain, two parallel drains, and periodic drains were considered under the assumption of a semi-infinite solution domain. The results indicate that solutions based on the Dupuit-Forcheimer assumption produce highly unrealistic results, even for use as rough approximations. The applicability of the analytic technique is limited to relatively small values of the time parameter, T less than 1.5, and to semi-infinite seepage domain. (Author)