Factors Affecting the Discharge Capacity of Shahi Katta Drain, Peshawar City Pakistan

The research aim to study the hydrologic and hydraulic conditions of Shahi Katta, a case study for major drains in the Peshawar City. It is a major drain with a length of 4.1 Mile or 6.56 Km approximately. The growth pattern observed along the drain is complex and so the exact study of Shahi Katta becomes much more complicated. This study was performed for a section of Shahi Katta with using uniform flow technique for calculation of Peak Discharges in different months of the year for 30 years of data. A section for the study was selected which was flooded in the 2010 major storm event. It was found from analysis that even after hundreds of years, Shahi Katha still has the capacity to carry the present discharge including both sanitary and storm water, however, the presence utility lines, encroachment and solid dumps inside the drains offer resistance to the flow. The maximum capacity shown by the drain section was 57 cumecs. Shahi Katta has still the capacity to accommodate the present discharge, if maintained properly.