State Water Resources Research Institute Program

Project ID: 2012RI110B
Title: Wave-Induced Pore Pressures in Remedial Caps in Reservoirs
Project Type: Research
Start Date: 3/01/2012
End Date: 2/28/2013
Congressional District: 2
Focus Categories: Water Supply, Sediments, Models
Keywords: reservoirs, sediment remediation, caps, water waves, pore pressures
Principal Investigator: Bradshaw, Aaron (University of Rhode Island)
Federal Funds: $ 16,540
Non-Federal Matching Funds: $ 34,813
Abstract: The proposed research will conduct preliminary wave tank experiments to study the generation of water wave-induced excess pore water pressures in remedial sediment caps in reservoirs. A number of reservoirs in the New England region contain contaminated sediments. One viable alternative for remediation of these sediments is to place a thick granular cap on the sediments to provide a barrier between the contamination and the water column. In shallow water depths, water waves are known to generate excess pore water pressures in the bottom sediments. Generation of excess pore water pressures could have two adverse effects: they can induce upward flow of water from the contaminated sediment into the water column, and they can reduce the sediment shear strength and destabilize the cap. The PI has already developed an analytical model to evaluate the potential for the generation of excess pore water pressures under water wave loading. However, the model still requires calibration and validation. The proposed research is a first step in collecting experimental data for this purpose.

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