Improved Methodology for Estimating Future Reservoir Storage Capacities: Application to Surface Water Supply Reservoirs in Illinois (Second Edition)

摘要

A new method has been developed for estimating future reservoir storage capacities, allowing for sediment deposition and compaction. Reservoir sediment surveys for 117 reservoirs, conducted by the Illinois State Water Survey over the past 60 years, were used to determine regional constants K to represent the severity of sediment deposition in the reservoirs. More than half of the 82 water supply reservoirs investigated had records of reservoir sedimentation surveys, and their K values were calculated by using data from those surveys. The average K values of the remaining non-surveyed water supply reservoirs were estimated from the regional distribution of the K values. The model can also be used for analyzing the economics of alternative sites and of design features that can be incorporated in dams for reducing reservoir sedimentation.