Hyderabad: Two technical papers submitted by Engineers of InterState Wing of Telangana State’s Irrigation Department have been accepted by the 88th annual meeting of the Indian National Committee on Large Dams (INCOLD) which will be held in New Delhi from April 4 to 20.
S Narasimha Rao, Chief Engineer, Irrigation and Command Area Development, K Venkata Narayana, Deputy Executive Engineer and N Ravishankar, Deputy EE will present ‘Case study in sedimentation and sustainable plans and approaches for Nizam Sagar and Sriram Sagar Reservoirs’.
Another paper on ‘Evaluating methods for estimating evaporation in major reservoirs–Srisailam project’ will be presented by S Narasimha Rao, M Raghunath Sharma, DEE, and MK Krishnan AEE, all from Telangana Irrigation Department.
The State engineers through the first paper discussed the issue of sedimentation in reservoirs which poses a serious challenge for large dams, in the context of climate change. The paper is a case study on reservoir sedimentation and sustainable plans and approaches for Nizam Sagar and Sriram Sagar reservoirs in Godavari basin of the state.
Considering the seriousness of the issue, hydrographic surveys and sophisticated bathymetric system were conducted for both the reservoirs, to assess the sedimentation. While FRL at Nizam Sagar has been increased, and an additional spillway was provided, in Sriram Sagar construction of silt arresting tanks and construction of check dams was undertaken to control sedimentation.
The second paper studied evaporation in major reservoirs. Climatic data of Kurnool Meteorological station has been used to compute evaporation in Srisailam reservoir on monthly, seasonal, and annual basis. The data and methodology for estimation of evaporation has an impact on the management of reservoirs towards water security. The paper looked into the Penman-Montieth method in estimating evaporation for a semi-arid region such as Telangana.
The 88th ICOLD Annual Meeting with a theme ‘Sustainable Development of Dams and River Basins’ is expected to provide a platform for Telangana engineers to put forth their findings before world’s best irrigation experts.