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Title: Design for flood control and wave protection, Chagrin River, Eastlake, Ohio : hydraulic model investigation
Authors: United States. Army. Corps of Engineers. Buffalo District.
Chatham, C. E. (Claude E.)
Keywords: Breakwaters
Chagrin River
Channel improvements
Flood protection
Hydraulic models
Lake Erie
Water waves
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-70-11.
Description: Technical Report
Abstract: A 1:75-scale model of the lower 2000 ft of the Chagrin River and sufficient offshore area in Lake Erie to permit generation of the required test waves was used to investigate the arrangement and design of certain proposed improvements with respect to wave action and flood control. The proposed improvement plans consisted of (a.) arrowhead breakwaters in Lake Erie at the mouth of the river, aggregating about 2360 ft in length; (b.) realignment and enlargement of the river channel from Lake Erie through the city of Eastlake, with levees where required to supplement channel enlargement; (c.) a spur channel and an access channel for navigation; (d.) recreational facilities at the river mouth; and (e.) the addition of beach fill and protective groins along the shoreline east of the east breakwater. A 60-ft-long wave machine and electrical wave-height measuring and recording apparatus were utilized in model operation. It was concluded from test results that (a.) the originally proposed plan of improvement, which specified a 275-ft-wide navigation opening and a 230-ft-wide, 10-ft-deep lower river channel, will not provide adequate protection from wave action, and current velocities in the revised channel will exceed the specified criteria; (b.) reducing upstream current velocities and wave heights by reducing the width of the navigation opening and outer channel to 150 ft will result in flooding along the west bank of the river; (c.) an improvement plan utilizing a 190-ft-wide, 14-ft-deep navigation opening and lower river channel will provide more satisfactory flood flow conditions than any of the other plans tested; (d.) while several of the plans tested would provide satisfactory wave conditions at most locations inside the harbor, only plan 6B meets the specified criteria at all locations; and (e.) the addition of wave absorbers to the lakeward face of the east breakwater and the installation of groins along the shore eastward of this structure will be beneficial in reducing the magnitude of alongshore littoral currents and should help to reduce beach erosion in this area.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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