The impact of wave loads and pore-water pressure generation on initiation of sediment transport |
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| Authors: | Edward C Clukey Fred H Kulhawy Philip L -F Liu George B Tate |
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| Institution: | (1) McClelland Engineers, Inc., 93003 Ventura, CA;(2) Cornell University, 14853 Ithaca, NY;(3) U.S. Geological Survey, 94025 Menlo Park, CA |
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| Abstract: | The build-up of pore-water pressure by waves can lead to sediment liquefaction and subsequent transport by traction currents. This process was investigated by measuring pore-water pressures both in a field experiment and laboratory wave tank tests. Liquefaction was observed in the wave tank tests. The results suggest that sand is less susceptible than silts to wave-induced liquefaction because of the tendency to partially dissipate pore-water pressures. However, previous studies have determined that pore-water pressures must approach liquefaction before current velocities necessary to initiate transport are reduced. Once liquefaction has occurred more sediment can be transported. |
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