STATISTICAL WATER-QUALITY MODELING FOR URBAN RUNOFF CONTROL PLANNING

Increased concern for the impact of urban runoff on receiving water qu ality makes acute the need to develop runoff quality control models fo r the various stages of urban runoff control planning. Analytical prob abilistic models, which compare favourably with the STORM simulation m odel, have been derived to predict the long-term pollution control per formance of storage-treatment systems from rainfall statistics. With k nowledge of the cost functions of storage-treatment systems, the devel oped cost optimization precedure can be used to determine the least-co st combination of storage and treatment systems which can achieve vari ous levels of quality control. This information is useful for specific ation of design performance and subsequent design level analyses of co ntrol systems.