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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.
A logical spreadsheet is a spreadsheet in which formulas take the form of logical constraints rather than function definitions.. In traditional spreadsheet systems, such as Excel, cells are partitioned into "directly specified" cells and "computed" cells and the formulas used to specify the values of computed cells are "functional", i.e. for every combination of values of the directly ...
The leachate drainage system is responsible for the collection and transport of the leachate collected inside the liner. The pipe dimensions, type, and layout must all be planned with the weight and pressure of waste, and transport vehicles in mind. The pipes are located on the floor of the cell.
A landfill in México with visible geomembrane in one of the slopes A landfill cell showing a rubberized liner in place (left). A landfill liner, or composite liner, is intended to be a low permeable barrier, which is laid down under engineered landfill sites.
Landfill operation in Hawaii. The area being filled is a single, well-defined "cell" and a protective landfill liner is in place (exposed on the left) to prevent contamination by leachates migrating downward through the underlying geological formation. Landfills have the potential to cause a number of issues.
LACMW Local Authority Collected Municipal Waste (household and commercial waste where collected by the local authority and which is similar in nature and composition as required by the Landfill Directive) LACW Local Authority Collected Waste (all waste collected by the local authority. This is a slightly broader concept than LACMW as it would ...
The landfill must have at least two impermeable liners as well as a system for leachate collection to prevent any water contamination. In addition to this, the landfill must also have a groundwater monitoring system in case there is a leak; the wells can be pumped to remove the contaminated water for treatment. [7]
A cell on a different sheet of the same spreadsheet is usually addressed as: =SHEET2!A1 (that is; the first cell in sheet 2 of the same spreadsheet). Some spreadsheet implementations in Excel allow cell references to another spreadsheet (not the currently open and active file) on the same computer or a local network.