WALTON35 is a series of 35 simple analytical and numerical models for flow, solute and heat transport and upconing of a fresh-salt water interface in saturated ground-water systems. Furthermore, the package includes some of the widely used mathematical functions, based on polynomial and numerical approximations. The models and functions are assembled in various menu-driven modules called by a shell program.

WALTON35 includes the following 35 models and functions:

• - computing W(u), W(u,r/B), Well function for partial penetration
• - computing Io(r/B), Ko(r/B)
• - Erf(x) and Erfc(x)
• - drawdown by one or more wells in a confined aquifer; non-steady state
• - drawdown by a partially penetrating well; non-steady state
• - drawdown by a well in a leaky confined aquifer; non-steady state
• - drawdown by a well in a leaky confined aquifer; steady-state
• - drawdown in 2 mutually leaking aquifers with 1 or more fully penetrating
• wells in the lower aquifer
• - water-table rise (mound) from a circular recharge area
• - stream depletion rate in a water-table aquifer due to pumping
• - well loss constants
• - one-dimensional advection and dispersion from a stream; confined aquifer
• - time aspects of advective transport from a stream towards a well
• - radial model: advection and dispersion from a single injection well
• - two-dimensional advection and dispersion; 24 continuous point sources
• - two-dimensional advection and dispersion; single slug point source
• - three-dimensional advection and dispersion; 24 continuous point sources
• - three-dimensional advection and dispersion; single slug point source
• - aquifer temperature at distance from heated water injection well in a homogeneous confined aquifer; radial convection and aquiclude conduction
• - spacing between heated water injection and production well in a homogeneous confined aquifer; convection and aquiclude conduction.
• - rise of fresh-salt water interface under an observation and an active production well in a homogeneous aquifer due to a single production well and the decline of the interface after the well stopped pumping
• - six two-dimensional flow models based on the Prickett Lonnquist Aquifer Simulation Model (Illinois State Water Survey Bulletin 55)
• - four particle tracking based solute transport models

SYSTEM REQUIREMENTS

• Intel 80i86 based computer
• 640 Kb RAM
• DOS 3.1 or higher

Author: W.C. Walton, Mahomet, Illinois