stripi(1) U.S. Geological Survey (wrdapp) stripi(1) NAME stripi - An analytical solution for two-dimensional ground-water solute transport in an infinite-width system with uniform flow and a finite-width solute source ABSTRACT The program STRIPI computes the analytical solution to the two- dimensional solute-transport equation for an infinite-width system with a finite-width solute source. METHOD The computer program calculates the concentration for the two- dimensional system based on the equation given in Wexler (1992a, p. 36). The concentration can be calculated for different times and spatial locations. HISTORY Version 1.1 1996/04/03 - Code restructuring and clean up: use of consistent spacing; use of upper and lower case variable names; statement labels renumbered; comment statements altered to be consistent; use of Hollerinth data in FORMAT statements removed; all variables and routines declared; duplicate code placed in new routines; interactive prompting for graphics output devices added. Bug fixed in contour routine related to contours at the left edge of the plot. Version 1.0 1990/04/03 - Initial published version. DATA REQUIREMENTS The program requires data on advective velocity, dispersion coefficient, spatial information, temporal information, and boundary concentrations. Optional data may include a first-order solute- decay coefficient. OUTPUT OPTIONS Output is the calculated concentrations at specified points in time and space. A plotting option exists to view the output as graphs. SYSTEM REQUIREMENTS pgm_name is written in Fortran 77 with the following extensions: use of include files and reference to compiler-dependent system date and time routines. The program requires the file glq.pts (provided), which contains normalized roots and weights of the Legendre polynomials. A script program is provided to facilitate connection of the program with the glq.pts file. Graphics are coded using Computer Associates' DISSPLA library references. Generally, the program is easily installed on most computer systems that have access to the DISSPLA graphics library. Alternatively, graphics can be disabled and data can be easily extracted from the program output and plotted using graphic presentation programs. The code has been used on UNIX-based computers. DOCUMENTATION Wexler, E.J., 1992a, Analytical solutions for one-, two-, and three- 7 Jul 1998 1 stripi(1) U.S. Geological Survey (wrdapp) stripi(1) dimensional solute transport in ground-water systems with uniform flow: U.S. Geological Survey Techniques of Water-Resources Investigations, book 3, chap. B7, 190 p. Wexler, E.J., 1992b, Analytical solutions for one-, two-, and three- dimensional solute transport in ground-water systems with uniform flow -- Supplemental Report: Source codes for computer programs and sample data sets: U.S. Geological Survey Open-File Report 92-78, 3 p., 1 computer diskette. TRAINING Some of the programs are introduced in the class Ground-Water Solute-Transport Concepts for Field Investigations (GW2005TC), offered annually at the USGS National Training Center. CONTACTS Operation: U.S. Geological Survey Office of Ground Water Thomas E. Reilly 411 National Center Reston, VA 20192 tereilly@usgs.gov Distribution: U.S. Geological Survey Hydrologic Analysis Software Support Program 437 National Center Reston, VA 20192 h2osoft@usgs.gov Official versions of U.S. Geological Survey water-resources analysis software are available for electronic retrieval via the World Wide Web (WWW) at: http://water.usgs.gov/software/ and via anonymous File Transfer Protocol (FTP) from: water.usgs.gov (path: /pub/software). The WWW page and anonymous FTP directory from which the ANALGWST software can be retrieved are, respectively: http://water.usgs.gov/software/analgwst.html --and-- /pub/software/ground_water/analgwst 7 Jul 1998 2