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Dredging
About: Dredging is a research topic. Over the lifetime, 3300 publications have been published within this topic receiving 28325 citations.
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TL;DR: In this article , the authors assess costs and environmental impacts (impact on climate, marine organisms, etc.) of different management options for polluted dredged sediment, by combining life-cycle assessment (LCA) of the climate impact, scoring of other environmental aspects and a cost evaluation.
17 citations
TL;DR: In this article, the authors examined the alteration of the land surface by humans in terms of on-site impacts as well as off-site effects in other storages, notably rivers, and suggested that much more relevant information is required to effect total catchment management.
Abstract: SUMMARY Environmental degradation is a widespread contemporary problem. It will be exacerbated by Greenhouse. The alteration of the land surface by humans is examined in terms of on-site impacts as well as off-site effects in other storages, notably rivers. Examples of bank erosion in the Hawkesbury-Nepean system are related to regime shifts, dams and dredging. Examples of environmental pollution by different forms of sewage disposal are given for Wollondilly Shire. It is suggested that much more relevant information is required to effect total catchment management.
17 citations
TL;DR: In this article, the authors applied a hydrologic model driven by a large suite of climate change scenarios to simulate both historical and future sediment yield and transport in two large adjacent watersheds in the Great Lakes region.
Abstract: Hydrological Processes. 2018;32:1223–1234. Abstract Changes in climate may significantly affect how sediment moves through watersheds into harbours and channels that are dredged for navigation or flood control. Here, we applied a hydrologic model driven by a large suite of climate change scenarios to simulate both historical and future sediment yield and transport in two large, adjacent watersheds in the Great Lakes region. Using historical dredging expenditure data from the U.S. Army Corps of Engineers, we then developed a pair of statistical models that link sediment discharge from each river to dredging costs at the watershed outlet. Although both watersheds show similar slight decreases in streamflow and sediment yield in the near‐term, by Mid‐Century, they diverge substantially. Dredging costs are projected to change in opposite directions for the two watersheds; we estimate that future dredging costs will decline in the St. Joseph River by 8–16% by Mid‐Century but increase by 1–6% in the Maumee River. Our results show that the impacts of climate change on sediment yield and dredging may vary significantly by watershed even within a region and that agricultural practices will play a large role in determining future streamflow and sediment loads. We also show that there are large variations in responses across climate projections that cause significant uncertainty in sediment and dredging projections.
17 citations
01 Jan 1988
TL;DR: In order to keep waterways and ports accessible to shipping, regular dredging of the sedimented materials is necessary as mentioned in this paper in densely populated and industrial countries nearly all sediments are considerably contaminated with inorganic and organic pollutants.
Abstract: In order to keep waterways and ports accessible to shipping, regular dredging of the sedimented materials is necessary. In densely populated and industrial countries nearly all sediments are considerably contaminated with inorganic and organic pollutants. Disposal of the huge quantities of dredge spoils with minimum effect on the quality of the environment is a major problem. International conventions forbid disposal of severely contaminated sediments in the open sea. Confined disposal of contaminated dredged materials on land raises questions about groundwater quality, and about adverse effects on biota and ecosystems.
17 citations
TL;DR: Dredging activities are a potential source of sediment and should be considered in any conservation and restoration planning process as mentioned in this paper, and Wise use of sediment resources from dredging is integral to accomplishing the conservation and Restoration initiatives and objectives being recommended under the Gulf of Mexico Alliance.
Abstract: Dredging activities are a potential source of sediment and should be considered in any conservation and restoration planning process. Wise use of sediment resources from dredging is integral to accomplishing the conservation and restoration initiatives and objectives being recommended under the Gulf of Mexico Alliance. Keeping dredged sediments within the natural system or using it in the construction of restoration projects can improve environmental conditions, provide storm damage protection, and contribute to habitat creation and restoration goals. Hundreds of millions of cubic yards of sediments are dredged each year from Gulf ports, harbors, and waterways, much of which could be used beneficially. Currently it is estimated that about 30% of all material dredged from federal channels in the Gulf states is used beneficially and very little of the privately funded dredging is used for beneficial purposes. The U.S. Army Corps of Engineers (USACE) conducts dredging under its navigation maintenanc...
17 citations