The Hydrologic Evaluation of Landfill Performance (HELP) model is a quasi-two-dimensional

hydrologic Hydrology () is the scientific study of the movement, distribution, and management of water on Earth and other planets, including the water cycle, water resources, and environmental watershed sustainability. A practitioner of hydrology is calle ...

numerical model Computer simulation is the process of mathematical modelling, performed on a computer, which is designed to predict the behaviour of, or the outcome of, a real-world or physical system. The reliability of some mathematical models can be dete ...

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 The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it ...

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 *Commercial versions:
Visual HELP
– based on the HELP version 3.07, offers a Microsoft Windows

GUI The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...

to view and edit soil profiles and to generate weather data.
HELP 3.95 D
– by Dr. Klaus Berger at the

University of Hamburg The University of Hamburg (german: link=no, Universität Hamburg, also referred to as UHH) is a public research university in Hamburg, Germany. It was founded on 28 March 1919 by combining the previous General Lecture System ('' Allgemeines Vo ...

; offers a Microsoft Windows UI and includes the model HELP 3.07 and the enhanced model HELP 3.95 D.

References

Landfill Hydrology models {{waste-stub