Author: John J. Franco

Publisher:

Published: 1973

Total Pages: 29

ISBN-13:

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The Devil's Island Reach of the Mississippi River is located about 5 miles upstream of Cape Girardeau, Missouri, between miles 55.0 and 68.0. A movable-bed model with scale ratios of 1:400 horizontal and 1:100 vertical, reproducing approximately 13.0 miles of the Mississippi River, was used to develop a channel of project dimensions through the reach. Results of the investigation indicated that: Contracting the channel in this reach to a control width of 1500 ft should generally provide adequate channel depths and alignment, except that special treatments might be required in crossings depending on the channel alignment and degree of sinuosity provided in the improvement plan. The control width can be reduced to less than 1500 ft to improve the depth and alignment of the channel over crossings with dikes of lower elevation than those used for the 1500-ft contraction. The cost of dike construction can be reduced by use of the stepped-down principle in the design of dike systems. (Author).

Download or read book Channel Conditions, Devil's Island Reach, Mississippi River, Missouri and Illinois written by John J. Franco and published by . This book was released on 1973 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Devil's Island Reach of the Mississippi River is located about 5 miles upstream of Cape Girardeau, Missouri, between miles 55.0 and 68.0. A movable-bed model with scale ratios of 1:400 horizontal and 1:100 vertical, reproducing approximately 13.0 miles of the Mississippi River, was used to develop a channel of project dimensions through the reach. Results of the investigation indicated that: Contracting the channel in this reach to a control width of 1500 ft should generally provide adequate channel depths and alignment, except that special treatments might be required in crossings depending on the channel alignment and degree of sinuosity provided in the improvement plan. The control width can be reduced to less than 1500 ft to improve the depth and alignment of the channel over crossings with dikes of lower elevation than those used for the 1500-ft contraction. The cost of dike construction can be reduced by use of the stepped-down principle in the design of dike systems. (Author).