Prediction of Groundwater Quality Improvement Down-Gradient of In Situ Permeable Treatment Barriers and Fully Remediated Source Zones

Abstract

DGCHANGE v1.0 estimates dissolved contaminant concentration reductions with time in nearfield monitoring wells down-gradient of permeable treatment barriers (PTBs). In this spreadsheet-based tool the aquifer is represented as a series of horizontal layers and the user enters layer-specific aquifer characteristics. The output is presented graphically in three main formats: (a) a cross-section snapshot of dissolved concentrations along the groundwater flow path at some user-specified time, (b) a table of dissolved concentrations vs. time in each layer at some user-defined down-gradient location, and (c) as a plot of expected monitoring well dissolved concentration vs. time at some user-defined down-gradient location for layer thickness- and layer discharge-weighted averages. The underlying fundamental basis and governing equations upon which DGCHANGE v1.0 is based are described in Appendix A. This appendix provides a step-by-step user s guide for DGCHANGE v1.0 and is organized by each of the tool s four worksheets that focus on model inputs, a cross-section snapshot, and changes with time at a monitoring well.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2008
Accession Number
ADA602219

Entities

People

  • Paul C. Johnson

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Boltzmann Equation
  • Coefficients
  • Conductivity
  • Environmental Pollutants
  • Equations
  • Granular Materials
  • Groundwater
  • Information Operations
  • Intervals
  • Materials
  • Monitoring
  • Near Field
  • Physical Properties
  • Porosity
  • Sorption
  • Thickness

Readers

  • Database Systems and Applications
  • Fluid Mechanics and Fluid Dynamics.
  • Groundwater Contamination Remediation.