IED Emission Inventory System

The International Environmental Database system (IED) is designed for the purpose of housing an emission inventory for a region. This region could be as big as a country or as small as a single complex source. Its main intent is to provide a structure for an emission inventory for a metropolitan area.

This inventory can include air emissions, water emissions, and solid waste; although most of the work to date is toward an air emissions inventory.The inventory developed in IED is spatially distributed as well as temporally distributed.

Typically, a 1km by 1km grid is used but in the case of a large area the grid can be increased to 2km by 2km up to 10km by 10 km or more. However, for air quality modeling, a grid of 1km by 1 km or 2km by 2km is normally preferred. The model allows for a weekday inventory and a weekend inventory for each hour of the day and for up to four seasons of the year.