Earlier a compendium on silting of reservoirs was published by Central Water Commission in April, 2015 containing sedimentation data on 243 reservoirs. This updated compendium contains data on 369 reservoirs as provided by the project authorities including data of 36 reservoirs survey sing Hydrographic survey and 120 Reservoirs surveyed using Remote Sensing Technique by CWC. Some data like design rate of sedimentation, catchment area, different reservoir levels, impoundment year and initial capacities etc. of earlier reservoirs also have been updated as per information provided by the project authorities.