Modelling of stormwater quality including tanks and overflows (MOSQITO) - design specification

This report details the design specification of the sewer quality model under development of Hydraulics Research Limited and funded by the Department of the Environment. Following a summary of the requirement specification, two particular elements of the model design are discussed. First, an appropriate methodology for simulating pollutant discharges from urban sewered systems is introduced. This together with details of various aspects of software design is discussed as part of the "non-procedural" aspects of the design. Second, particular sub-models and algorithms for simulating the behaviour of pollutants and sediments within an urban drainage system are detailed. Definition of the elements to be included within the final model form a major part of the "procedural" aspects of the design. Finally, a provisional timetable of the various milestones in the development of the model is also outlined.