Provide a definition of the scope of the model including space and time scales, size of economic unit, etc., and the key limitations of the model as applicable:

IWEM is a screening level ground water model developed to evaluate ground water impacts from industrial waste management practices or the beneficial reuse of industrial materials. The software helps determine the most appropriate liner design for a waste management unit that is protective of human health as well as ground water resources. In addition, the model helps determine the appropriateness of reusing industrial materials in beneficial use applications such as structural fills or roadways. IWEM does this by considering several factors that determine the fate and transport of contaminant in ground water, which include: one or more types of liners (for waste management units) or the material properties and structure (of a structural fill or roadway), the expected leachate concentrations of the anticipated waste or reused industrial material constituents, and the hydrogeologic conditions of the site. The ultimate goal of the model is to minimize, or avoid adverse ground water impacts. IWEM models four types of waste management units:  Landfills,  Waste piles,  Surface impoundments, and  Land application units.

Decision Sector

Land use

Building Infrastructure

Transportation

Waste Management

Time Scale

Annual

Multi-Year

Other

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Point in Time

Spatial Extent

Building

City

Continent

County

Globe

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Nation

Neighborhood

Region

Site

State

Watershed

Technical Skills Needed to Apply Model

Advanced GIS

Advanced Statistics

Basic GIS

Basic Statistics

Intermediate GIS

Model Calibration

Software Coding

Spreadsheet Calc/Basic Math

Other Specialized Knowledge

None

Insufficient Information