In order to model irregularly‑shaped areas, the user may have to subdivide the area into smaller areas of varying shapes, sizes, and orientations. However, with the ability to specify rectangular shapes and orientation angles, the user has considerable flexibility in subdividing the area. Since the numerical integration algorithm can handle elongated areas with aspect ratios of up to 10 to 1, the ISC area source algorithm may be useful for modeling certain types of line sources. There are no restrictions on the placement of receptors relative to area sources for the ISC models. Receptors may be placed within the area and at the edge of an area. The ISC models will integrate over the portion of the area that is upwind of the receptor. However, since the numerical integration is not performed for portions of the area that are closer than 1.0 meter upwind of the receptor, caution should be used when placing receptors within or adjacent to areas that are less than a few meters wide. More technical information about the application of the ISC area source algorithm is provided in Sections 1.2.3 and 2.2.3 of Volume II of the User's Guide.
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castellano: DIS CUS DES RAD english: DIS CUS DES RAD
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