Assessment of Reservoir Sedimentation Using Remote Sensing Technique with GIS Model-A Review

Assessment of the sediments in the reservoir is much essential as it affects the life of the reservoir & also the quality. To assess the sedimentation in the reservoir mainly we have conventional & Remote sensing technique. The conventional techniques of quantification of sediment deposition in a reservoir such as hydrographic surveys and the inflow-outflow methods, are cumbersome, costly and time consuming while on the other hand an alternative of conventional technique that is the digital image processing technique of remotely sensed data is easy, less costly and subjective of minimum human errors can be used for routine assessment of sedimentation in reservoirs. Remote sensing technique uses the fact, that the water spread area of reservoir at various elevations keeps on decreasing due to sedimentation. Remote sensing satellite provides information regarding the water spread area of the reservoir at a particular elevation on the date of pass of the satellite which helps to estimate sedimentation in a Reservoir over a period of time. In the present paper, an attempt has been made to give a review on remote sensing technique adopted by researcher earlier for the assessments of reservoir sedimentation. This paper also delineates the use of different GIS MODEL with remote sensing data to assess the sedimentation & revised capacity of reservoir.