Optimum Utilisation of Water of Mudasarlova Reservoir (1902) : the fiest Impounding reservoir for Water Supply for Visakhapatanam City, AP , India a Case Study / V. Chandraiah, P. Malleswaa Rao and V. Mahamood

The reservoirs in the urban area are useful for storage of drinking water to the city. The Mudasarlova Reservoir in the Visakhapatnam city limits is situated between the Kailasakonda, Kambalakonda and Simhachalam Hills. Some residential colonies are developed in the catchment area of the reservoir. Due to sewage effluents the quality of the water in the reservoir will be spoiled. In order to propose for proper utilization of the reservoir water, the yield of the reservoir based on the previous 54 years rainfall data is computed. The present storage capacity of the reservoir is computed after conducting hydrographic survey using Eco-sounder and the need for further deepening of the reservoir is suggested. The maximum flood discharge in to the reservoir is also computed and compared with the discharge capacity of the spillway and it is suggested that the spillway length shall be increased from existing 40.0m to 51.0m. It is also suggested to propose 0.50 MGD (2.25 MLD) water treatment plant for supplying the reservoir water to the surrounding area. The curtain grouting along the dam is also suggested to control seepage through the bed of the reservoir.