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The Hydrologic Evaluation of Landfill Performance (HELP) model is a quasi-two-dimensional hydrologic numerical model for conducting water balance analysis of landfills, cover systems, and other solid waste containment facilities; it was developed for the United States Environmental Protection Agency.^[1]

Versions

Public domain (free) version:
- HELP v4.0 – Microsoft Excel-based version developed by EPA ORD's Center for Environmental Solutions and Emergency Management, HELP 4 user manual and further documentation for HELP v3.0^[1]
Commercial versions:
- Visual HELP – based on the HELP version 3.07, offers a Microsoft Windows GUI to view and edit soil profiles and to generate weather data.
- HELP 3.95 D – by Dr. Klaus Berger at the University of Hamburg; offers a Microsoft Windows UI and includes the model HELP 3.07 and the enhanced model HELP 3.95 D.

^ ^a ^b Schroeder, P.R., Dozier, T.S., Zappi, P.A., McEnroe, B.M., Sjostrom, J.W. and Peyton, R.L. (1994). The Hydrologic Evaluation of Landfill Performance (HELP) model: Engineering documentation for version 3. Cincinnati, OH: U.S. Environmental Protection Agency Risk Reduction Engineering Laboratory.{{cite book}}: CS1 maint: multiple names: authors list (link)

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