Topic
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: Investigation of the effectiveness of sediment dredging, intermittent aeration, and in situ inactivation with modified clays to reduce the internal loading of sediment from a seriously polluted river indicated that clay inactivation is the best method for controlling theinternal loading of both phosphorus and nitrogen inSeriously polluted river sediment.
64 citations
TL;DR: In this article, the authors analyzed before and after dredging operations in a coastal lagoon (Pialassa Baiona, Italy) to detect the actual impacts, disturbed sites were contrasted with multiple controls in two distinct times, according to a sampling design based on Beyond BACI principles.
Abstract: Conservation and management of coastal lagoons envisage direct human intervention. To prevent siltation and to preserve the hydrodynamics features of the lagoon system, the inner channels undergo regular maintenance dredging.
Sediment properties (RDP, organic matter, grain size), trace metals (Cd, Cu, Cr, Hg, Ni, and Pb), and toxicity vs. the amphipod Corophium insidiosum and the luminescent bacterium Vibrio fischeri, were analysed before and after dredging operations in a coastal lagoon (Pialassa Baiona, Italy). To detect the actual impacts, disturbed sites were contrasted with multiple controls in two distinct times, i.e. before and after disturbance, according to a sampling design based on Beyond BACI principles.
The integrated methodology here adopted suggests that dredging operations carried out are not likely to pose dramatic effects on environmental quality of the lagoon.
64 citations
TL;DR: In this paper, changes in the benthic infaunal community structure at a location in south-west Ireland subject to dredging impacts were studied, and a clear shift from the abundance of omniverous crustaceans in the dredged area to filter-feeding bivalves in the fallowing area was observed.
64 citations
TL;DR: In this article, a laboratory experiment was carried out through a six-month incubation of undredged and dredged cores to study the effect of sediment dredging on phosphorus (P) release from the sediment in the Taihu Lake.
64 citations
Book•
01 Jan 1992
TL;DR: In this article, the authors present a basic fluid mechanics for dredging, including the theory and application of centrifugal pumps elements of dredge pump design model testing of pumps pump characteristics cavitation of dredges gas effect and removal.
Abstract: Part 1 Basic fluid mechanics. Part 2 Dredge pumps: theory and application of centrifugal pumps elements of dredge pump design model testing of pumps pump characteristics cavitation of dredge pumps gas effect and removal. Part 3 Equipment: dredging equipment - mechanical, hydraulic suction including cutterhead, hopper, other and special equipment for contaminated soils barges tug and work boats survey boats. Part 4 Sediment: sediment characteristics classification systems soil investigation in situ materials in disposal areas sediment sampling settlement consolidation. Part 5 Pipeline transport of solids: regimes of settlement flow methods to calculate friction losses types of pipe. Part 6 Dredging methods: river estuaries open water operating characteristics of cutterhead dredges. Part 7 Disposal of dredged material: open water confined management strategies construction of dredged material islands for wildlife productive use of dredged materials. Part 8 Environmental effects of dredging: re-suspension of sediment while dredging placement of dredged material - open water and confined regulatory criteria - environmental impact statements and permit system. Part 9 Instrumentation and automation: flow and velocity meters density meters production meters. Part 10 Project planning: preliminary studies - site investigations, surveying, project layout, volume calculations plans, specifications, regulations, permits contract preparation, estimation, bidding project management - production measurement, reports.
63 citations