CS(AR)-1/2007-08 : Assessment of sedimentation rate of reservoirs using remote sensing techniques (summary of studies completed during 2002-2007)

Abstract

Efficient reservoir management calls for periodic assessment of its capacity. Capacity surveys of reservoirs are important to study patterns and rate of sedimentation for defining appropriate measures for controlling sediment inflow, for managing the available storage in reservoir and for optimum reservoir operation schedule based on realistic assessment of available storage. Data from space platforms can play a significant role in reservoir capacity surveys. In the recent past, satellite remote sensing has emerged as an important tool in carrying out reservoir capacity surveys rapidly, frequently and economically. Multi temporal satellite data provide information on elevation contour areas directly in the form of water spread areas. Any reduction in the water spread area at a specified elevation over a period of time is indicative of sediment deposition at this level. When integrated over a range of water stages, it enables computing volume of storage lost due to sedimentation. During five years 2002-2007, sedimentation rate in twenty three reservoirs have been quantified using remote sensing techniques. During these five years, studies have been carried out at NIH Head quarters and its regional centres. This summary report describes the results of assessment of sedimentation rate using remote sensing techniques for these reservoirs. The following scientists and scientific staff have carried out the sedimentation study during last five years. Dr. Sanjay K. Jain, Sc. El; Mr. D.S. Rathore, Sc. El; Dr. M.K. Goel, Sc. El; Mr. Y.R.S. Rao, Sc. El ; Mr. V.S. Jeyakanthan, Sc.C; Mr. T.R. Nayak, Sc.0 ; Dr. B.K. Purendara, Sc. C ; Mr. Ravi V. Galkate, Sc.C; Mr. Dilip Durbude, Sc. B Mr. Rahul K. Jaiswal, Sc.'B', Mrs. Anju Chaudhary, SRA ; Mr. P.K.Agarwal, P.R.A. Mr. D.Mohana Rangan, and Mr. U.V.N. Rao, S .R. A. The summary report has been prepared by Dr. Sharad K. Jain, Scientist F & Head, Dr. Sanjay K. Jain, Scientist El and Mrs. Anju Chaudhary, S.R.A., Water Resources Systems Division.