MARY ESTHER CYNTHIA JOHNSON AND J. GNANA SUDHA
Abstract
Hyderabad is purely an urban district in Andhra Pradesh with 100%, urban population. The growing population of Hyderabad with increasing number of housing colonies is responsible for severe mess being applied on water bodies. In : Lake Banjara and Lake Nadimi arc subjected to encroachment, entry of domestic sewage and other anthropogenic activities like washing clothes, bathing etc have resulted in high silting, sedimentation and progressive degradation of chemical parameters like Nitrates, Phosphates, Chlorides and Silicates significantly. The estimated percentage of rates of accumulation of these factors per year were observed to be 200%, 26.6 %, 98.9% and 30.1% in Lake Banjara and 3.75%, 6.6%, 64.6% and 28.2% in Lake Nadirni, respectively leading to gross eutrophication and silting of the lakes. This endangers the very existence of lakes which can be conserved by growing green belt around each lake and not allowing sewage disposal into these water bodies.