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Characterization of Coastal Dredged Sediments Used in Land Restoration Projects
Coastal property development, sea level rise, geologic subsidence, loss of barrier islands, increasing number and intensity of coastal storms, and other factors have resulted in water quality degradation, wetlands loss, reduced storm and surge protection, ground settlement, and other challenges in coastal areas throughout the world. One of the goals toward reestablishing a healthy coastal ecosystem is to rebuild wetlands with river diversion or sediment conveyance projects that optimally manage and allocate sediments, minimally impact native flora and fauna, and positively affect water quality. Restoring the marshes through deposition of dredged material from adjoining ocean, navigation canals, and river beds, and subsequent reestablishment of emergent wetland vegetation will help to protect the coastal properties and infrastructure systems from accumulated damage due to elevated water levels and storm surge forces. Engineering properties and material characteristics of the dredged material and foundation soils are input parameters in several mathematical models used to predict the long-term behavior of the dredged material and foundation soil. Therefore, proper characterization of the dredged material and foundation soils is of utmost importance in the correct design of a coastal restoration and land reclamation project. The sedimentation characteristics of the dredged material and their effects on the time rate of settlement of the suspended solid particles and underlying foundation soil depend, among other factors, on (a) the grain size distribution of the dredged material, (b) salinity (fresh, brackish, or saltwater environment) of the composite slurry, and (c) concentration of the solid particles in the slurry. This paper presents current methodologies used and advancements made in properly characterizing the sediments dredged and used in coastal restoration projects.
Characterization of Coastal Dredged Sediments Used in Land Restoration Projects
Coastal property development, sea level rise, geologic subsidence, loss of barrier islands, increasing number and intensity of coastal storms, and other factors have resulted in water quality degradation, wetlands loss, reduced storm and surge protection, ground settlement, and other challenges in coastal areas throughout the world. One of the goals toward reestablishing a healthy coastal ecosystem is to rebuild wetlands with river diversion or sediment conveyance projects that optimally manage and allocate sediments, minimally impact native flora and fauna, and positively affect water quality. Restoring the marshes through deposition of dredged material from adjoining ocean, navigation canals, and river beds, and subsequent reestablishment of emergent wetland vegetation will help to protect the coastal properties and infrastructure systems from accumulated damage due to elevated water levels and storm surge forces. Engineering properties and material characteristics of the dredged material and foundation soils are input parameters in several mathematical models used to predict the long-term behavior of the dredged material and foundation soil. Therefore, proper characterization of the dredged material and foundation soils is of utmost importance in the correct design of a coastal restoration and land reclamation project. The sedimentation characteristics of the dredged material and their effects on the time rate of settlement of the suspended solid particles and underlying foundation soil depend, among other factors, on (a) the grain size distribution of the dredged material, (b) salinity (fresh, brackish, or saltwater environment) of the composite slurry, and (c) concentration of the solid particles in the slurry. This paper presents current methodologies used and advancements made in properly characterizing the sediments dredged and used in coastal restoration projects.
Characterization of Coastal Dredged Sediments Used in Land Restoration Projects
Ghose Hajra, Malay (author) / Mattson, II, Gregory (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 2098-2111
2014-02-24
Conference paper
Electronic Resource
English
Characterization of Coastal Dredged Sediments Used in Land Restoration Projects
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