HR: 0800h
AN: H11C-0653    [Abstracts]
TI: Development of Floating Wave Barriers for Cost Effective Protection of Irrigation and Catfish Pond Levees
AU: * Ozeren, Y
EM: yozeren@olemiss.edu
AF: Department of Civil Engineering, University of Mississippi, University of Mississippi, University, MS 38677, United States
AU: Wren, D G
EM: dwren@asa-oxford.ars.usda.gov
AF: USDA-ARS National Sedimentation Laboratory, 598 McElroy Dr. P.O. Box 1157, Oxford, MS 38655, United States
AU: Alonso, C V
EM: calonso@msa-oxford.ars.usda.gov
AF: USDA-ARS National Sedimentation Laboratory, 598 McElroy Dr. P.O. Box 1157, Oxford, MS 38655, United States
AB: Earth levees for catfish ponds and irrigation water storage experience significant embankment erosion due to wind generated waves. Large seasonal fluctuations in water level make vegetative bank protection impractical, and other stabilization methods such as the use of old tires or riprap are not acceptable due to ecological and economic concerns. The goal of the present work is to define configurations and construction techniques for inexpensive floating breakwaters made of polyethylene irrigation tubing. Based on wave characteristics measured in an irrigation pond near Lonoke, Arkansas, a laboratory scale wave generating flume was designed, constructed, and used to test multiple wave barrier configurations for regular waves in deep and transitional water depths. Wave transmission characteristics were investigated for the following breakwater arrangements: (1) fully restrained, (2) vertically restrained with a single mooring line, (3) horizontally restrained with a rigid arm hinged at one end, and (4) horizontally restrained with piles at both sides of the breakwater. The test results show that cylindrical pipes can be used effectively as floating breakwaters and that wave transmission characteristics strongly depend on the draft of the breakwater and the mooring configuration. The use of multiple small cylinders instead of a single large one can reduce cost while maintaining the same level of wave attenuation. The wave characteristics measured in the field and the results of laboratory testing resulted in a final design that is to be tested at the prototype scale in an irrigation pond.
DE: 1815 Erosion
DE: 1842 Irrigation
DE: 1857 Reservoirs (surface)
DE: 4560 Surface waves and tides (1222)
SC: Hydrology [H]
MN: 2007 Fall Meeting