APPLICATION OF K-EPSILON MODEL TO THE STABLE ABL - POLLUTION IN COMPLEX TERRAIN

A procedure for the prediction of stable atmospheric boundary layers ( ABL) over complex terrain is developed. The standard k-epsilon model a nd the computer programme CFX are used as a basis. The turbulence mode l is modified for the prediction of stable ABL according to recent pub lished works. The procedure employs databases containing topology, roa d and traffic data, and is applied to estimate ground pollution concen trations in a stable atmosphere over rough terrain. Examples from road planning in Drammen City show comparison with measurements and effect s of planned roads.