38-Hydrological simulation for rejuvenation of the Hussain Sagar Lake, Hyderabad

Abstract

With increasing urbanization and the pressures of population, implementation of major water supply schemes for the increased populations in urban areas in cities are now gradually acquiring shape. The wastewater managers are now faced with the task of managing the additional wastewater from the cities for which the existing wastewater treatment systems are totally inadequate. In many cities, the wastewaters are being discharged into the main city lakes thereby causing deterioration of the urban water bodies. Hyderabad City with a population of 5 533 640 (2001 census) the capital of Andhra Pradesh state in India is one such city where such a problem is being faced. The main city lake, Hussain Sagar, was facing problems of low water levels and severe eutrophication because of the raw sewage being discharged into it from the newly developing areas in it's catchment. This paper describes the hydrological study carried out to assess the hydrology of the receiving waters of Hussain Sagar lake in Hyderabad and to suggest remedial measures for rejuvenation of the receiving lake waters. The study concluded that an additional 18.16 MId STP would be required to treat the influent to the lake to maintain the prescribed water level in the lake based on 1 in 5 year dry period.