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Abstract-
Stormwater has become a major issue both in urban and rural human settlements. Storm water runoff estimations have been ignored ever since. Model Town and Civil Lines sub-watersheds/catchments of the Patiala city, Punjab have been selected for the stormwater estimation. The catchment characteristics and the rainfall characteristics required in the estimations have been obtained. Water quality treatment volume – WQv, water quality capture volume, and peak runoff rates have been considered as required. The hydrological methods and models available for the quantification were reviewed, and the method appropriate for the present stormwater runoff estimations was articulated. Using the method, stormwater runoff estimations for the selected catchments has been done. Details of the catchments, the rainfall, and the runoff estimates are presented in this paper