Numerical Sedimentation Study of Shoaling on the Ohio River near Mound City, Illinois
Abstract
A numerical sedimentation study was conducted on the Ohio River in the vicinity of Mound City, Illinois. The purpose of the study was to evaluate shoaling tendencies between river miles 971 and 973.2. The model was used to determine if raising the elevations of two existing transverse would reduce shoaling at that location. First the model was run in a base (as is) condition, and calibrated to both hydraulic and sediment field measurements. Then the crest elevations of the existing dikes were raised by one foot. Plan condition simulations were then made for a steady-state bankfull flow of 498,650 cfs (14,120.4 cms) , and an unsteady simulation consisting of a 48 day hydrograph from 14 Jul 31 Aug 2012, which had a peak flow of 152,000 cfs (4,304.2 cms) . The steady state simulation showed a difference of 0.16 ft (0.05 m), between the base and plan conditions, and for the unsteady simulation a difference of 0.33 ft (0.1 m). These results indicate that raising the structures 1 foot has little effect on shoaling in the navigation channel. In the future this model can be modified to test additional structural and/or operational changes that might reduce shoaling.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2015
- Accession Number
- ADA621156
Entities
People
- Barry Vessels
- David Abraham
- Nate Clifton
Organizations
- Engineer Research and Development Center