Accession Number:

ADA621156

Title:

Numerical Sedimentation Study of Shoaling on the Ohio River near Mound City, Illinois

Descriptive Note:

Final rept. Feb 2013-Jun 2014

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB

Report Date:

2015-08-01

Pagination or Media Count:

28.0

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 andor operational changes that might reduce shoaling.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE