Event Title
Laboratory Evaluation of Self-Weight Consolidation of Dredged Sediments for Coastal Restoration Projects
Faculty Sponsor
Malay Ghose-Hajra
Submission Type
Oral Presentation
Description
Laboratory evaluation of self-weight consolidation of dredged sediments for coastal restoration projects Coastal property development, oil and water extraction, global climate change, sea level rise, coastal subsidence, loss of barrier islands and other factors have resulted in water quality degradation, decline in fisheries, regional settlement, wetlands loss, beach degradation, reduced storm and surge protection, and other challenges in coastal areas throughout the world, including the Louisiana coast. Various techniques have been employed to
restore the fragile wetlands of Louisiana. Native or recently deposited subsurface material is mechanically or hydraulically dredged from its location in a fresh, brackish, or saltwater environment and transported and distributed in the marsh renourishment areas to create new land. Settling refers to those processes in which the dredged material is separated into supernatant water of low solids concentration and a more concentrated slurry. Over time, the water recedes and the sediments consolidate due to their own weight. The engineering properties of the dredged material are input parameters in several mathematical models that are used to predict the long-term performance measures of restoration projects. Laboratory self-weight consolidation tests can provide data for designing the containment area to meet effluent suspended so lids criteria and to provide adequate storage capacity for the dredged solids. This presentation will describe the self-weight consolidation testing procedure used in the laboratory to evaluate the compression characteristics of the dredged sediments used in Louisiana coastal restoration projects. Results from multiple self-weight consolidation tests will be presented and discussed. The research findings will contribute to the cost-savings, time-savings, and improved outcomes of Louisiana Coastal Restoration project implementation.
Laboratory Evaluation of Self-Weight Consolidation of Dredged Sediments for Coastal Restoration Projects
Laboratory evaluation of self-weight consolidation of dredged sediments for coastal restoration projects Coastal property development, oil and water extraction, global climate change, sea level rise, coastal subsidence, loss of barrier islands and other factors have resulted in water quality degradation, decline in fisheries, regional settlement, wetlands loss, beach degradation, reduced storm and surge protection, and other challenges in coastal areas throughout the world, including the Louisiana coast. Various techniques have been employed to
restore the fragile wetlands of Louisiana. Native or recently deposited subsurface material is mechanically or hydraulically dredged from its location in a fresh, brackish, or saltwater environment and transported and distributed in the marsh renourishment areas to create new land. Settling refers to those processes in which the dredged material is separated into supernatant water of low solids concentration and a more concentrated slurry. Over time, the water recedes and the sediments consolidate due to their own weight. The engineering properties of the dredged material are input parameters in several mathematical models that are used to predict the long-term performance measures of restoration projects. Laboratory self-weight consolidation tests can provide data for designing the containment area to meet effluent suspended so lids criteria and to provide adequate storage capacity for the dredged solids. This presentation will describe the self-weight consolidation testing procedure used in the laboratory to evaluate the compression characteristics of the dredged sediments used in Louisiana coastal restoration projects. Results from multiple self-weight consolidation tests will be presented and discussed. The research findings will contribute to the cost-savings, time-savings, and improved outcomes of Louisiana Coastal Restoration project implementation.
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3rd place