PLUME

Order No: BAS 01
Version: 3.01 (January 1997)
Price: Contact igwmc@mines.edu for more info

PLUME, also called PLUME-PH, is an analytical model for calculation of point concentration in a homogeneous aquifer resulting from a continuous, time-varying release of a single radioactive or non-radioactive component from a horizontal line source. It is assumed that the flow is unidirectional (uniform) and that the line source is situated perpendicular to the flow direction. The model accounts for advection, dispersion, retardation, and first-order decay. The plume can be described in three dimensions with the horizontal line source at any depth in the aquifer, or vertically averaged over the depth of the aquifer.

The continuous source release function is reduced to a limited number of user-specified time/source-strength intervals by linear approximation. This approximated release function is further divided in a number of integration intervals. Simpson's rule of integration is used to superpose the effect of each of these integration intervals on the concentration distribution. This allows the user to specify both short- and long-duration sources, as well as decaying sources. The calculation of concentration data takes place on basis of a user-defined computational grid, or as time series for specific observation points. The results can be exported as ASCII files for postprocessing in commercial graphic software.

PLUME-PH is a public domain, DOS-based program, distributed by IGWMC complet with a data input/editing preprocessor. The documentation consists of installation instructions and a simple user's manual.

SYSTEM REQUIREMENTS

Intel 80i86 based computer, 640 Kb RAM, DOS 3.0 or higher, VGA graphics. The program runs under Windows 3.1. Windows 95 and Windows NT 4.0.

Author: P.K.M. van der Heijde (IGWMC)