The National Reservoir Sedimentation Data Base: Background and Purpose

Author(s): Römkens, M.; Jones, M.; Gray, J.

For many years, the Federal Interagency Subcommittee on Sedimentation (SOS), one of the nine Subcommittees of the USGS Advisory Committee on Water Information (ACWI), has been spearheading the development of a National Data Base concerning the sedimentation status of the Nation's Reservoirs. This data base is of critical importance for a number of issues such as water storage for flood control, sediment storage to reduce sediment movement in watersheds, water supply for irrigation and consumptive use, to maintain recreation functions, etc. Changes in the storage capacity may affect all these functions including the potential of the destabilization of the structures containing the reservoirs. The nation has more than 85000 dams and more than 110000 miles of levees. A large number of these dams are principally earthen dams that were built within the last 60 years, usually with an economic life time of 50 years. Many of them have lost a significant part of their storage capacity due to sedimentation. Decisions need to be made to decommission or rehabilitate these reservoirs and associated dam structures. The presentation will discuss the development of this data base, including the status of the reservoirs, dam failures and their disastrous consequences.

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Technical Sessions

1 Best Management Practices #1
2 Delta Water Assessment
3 Flood Assessment & Mgmt.
4 Wetlands
5 Watershed Mgmt. #1
6 Non-Point Source Assessment
7 Modeling
8 Water Quality
9 Best Mgt. Practices #2
10 Delta Water Conservation
11 Sedimentation
12 Storm Water
13 Watershed Mgt. #2
14 Public Water Systems
15 Surface Water Assessment & Evaluation

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