Abstract:
Thotamuna area of Matara Municipal council area taken for the study: in this study 34ha area located
near to Thotamuna fishery harbour was tested. Drainage net work and characteristics of this area were
identified from field works. Then model was developed for the selected area using mathematical modeling
storm water management modeling software. Drainage net work and characteristics were assessed with
changing parameters of the model. In this paper describes the model development with unguaged data for an
urban area