UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY RESTON, VA. 22092 In Reply Refer To: November 20, 1981 Mail Stop 411 GROUND WATER BRANCH TECHNICAL MEMORANDUM NO. 82.02 Subject: PUBLICATIONS--Report "Type curves for selected problems of flow to wells in confined aquifers" by J. E. Reed This report assembles, under one cover and in a standard format, the more commonly used type-curve solutions for 11 conditions of flow to a well in an infinite confined aquifer. Each solution discussion includes the following: (1) a list of the assumptions made in the mathematical development, (2) the differential equation and the boundary and initial conditions describing the ground-water problem are given in mathematical notation and the physical interpretation of each equation is described in the text, (3) the mathematical solution is given in the form of tables and/or type curves, (4) a "comments" section that describes the conditions for which some of the assumptions are applicable, and (5) in most cases a computer program written in FORTRAN is included that can be used for calculating additional function values. This latter feature should be particularly useful in generating type curves to be used for analyzing water- level change data in response to variable well discharge describable by one of five selected functional forms. Most of the type curves are on a folded plate. The curves are on one of two different plotting scales for ease of comparing solutions. Please note that figures 4.2 and 5.2 on that plate are slightly distorted by a fraction of a percent. It is our intent, when funds are available, to have the type-curve plots put on a mylar sheet and copies distributed to the field. (s) Gordon D. Bennett Chief, Ground Water Branch WRD Distribution: A, S, PO Two copies of memo with report to each District One copy of memo with report to each SubdistrictPUBLICATIONS--Report "Type curves for selected problems of flow to wells in confined aquifers"