The development of a spatially resolved emissions inventory for local air quality management applications.
This research presents the development and application of generic methodologies for the
production of a spatially resolved emissions inventory for the North West region of
England. The overall purpose of the estimates is to provide emissions data for use
within air quality management applications. The North West region is used as the basis
of the work due to being composed of a number of administrative units and providing
the regional context for local air quality management in the main urban areas of Greater
Manchester and Merseyside.
Estimates are made for the key urban pollutants (CO, NOx, VOCs, PM and S02) from
anthropogenic sources in 1994 and are shown at a variety of spatial scales. Data are
available in terms of a regional 5 x 5 km grid, a sub-regional 1 x 1 km grid or at the
scale of the original data source. Source categories, which correspond to broad
management groupings, comprise road transport; rail transport; airports; shipping;
industry; (Part A and Part B); and other (domestic and commercial) sources. Estimation
procedures are developed in relation to readily available data sources and are applied
within a GIS environment. The use of GIS has been shown to be an appropriate tool for
the development of spatially resolved inventories and has further potential in relation to
additional applications of the resultant emissions data.
The requirements of producing a generic methodology which uses readily available data
sources has been found to limit the degree of detail with which it is possible to develop
estimation procedures. One of the principal limitations is the availability of comparable
activity data for a number of administrative units. However, the results of the inventory
are shown to be useful for a number of air quality management activities, including the
identification of patterns of emissions at different scales of investigation and the
identification of the location and causality of emission 'hotspots'.