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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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Patent
19 Aug 2009
TL;DR: In this paper, the authors proposed a utility model to solve the technical problems that aiming at the defects in prior art, the utility model provides a special desilting dredging equipment which is used for excavation dredging, long-distance conveying and has high solid content, wide application range of conveying media and no backwater secondary pollution, in particular to a dredging pumping ship for ocean tidal zone.
Abstract: The utility model solves the technical problems that aiming at the defects in prior art, the utility model provides a special desilting dredging equipment which is used for excavation dredging, long-distance conveying and has high solid content, wide application range of conveying media and no backwater secondary pollution, in particular to a dredging pumping ship for ocean tidal zone. The dredging pumping ship comprises a propeller 8, a deck crane 10, power stations 10, 11 and 12, an operation chamber 5 and a living chamber 6 arranged on a deck upper platform 4; wherein, a ladder 7 which can be climbed up and down by crew is arranged between the platform 4 and the deck; a hydraulic excavator 1 and a vibration sieve 2 with a material hopper are sequentially arranged on the front end of the pumping ship body; the rear end of the vibration sieve 2 is connected with a slush pump 3; a sieving material sliding channel 16 is arranged on the lateral surface of the vibration sieve 2; the equipments are connected with a control chamber through cables and are controlled in centralized way by the operation chamber 5. The dredging pumping ship can adopt self-excavation channel method to adapt to variable water level of ocean tide; the solid content in conveyed material is high, the efficiency is high, the sedimentation time is short and the backwater secondary pollution is prevented.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a full-scale (470 m 3 ) process for biological treatment of dredging spoil from the Petroleum Harbour in Amsterdam has been monitored during a pilot project, and the results showed that polycyclic aromatic hydrocarbons and mineral oil were successfully concentrated in the silt fraction.

7 citations

DOI
01 Jan 1970
TL;DR: In this article, the water quality in terms of benthic vegetation, concentrations of phytoplankton, nutrients, dissolved oxygen and water turbidity was modelled using the MIKE 21 eutrophication model.
Abstract: A large fashionable tourist resort area is under construction at Benoa Bay, Bali. The location is an island called Turtle Island, which is an enlargement of the existing Serangan Island. Extensive dredging operations of surrounding sea bed are needed for land reclamation, resulting in a general change in current pattern and water exchange for the Benoa Bay and the strait between the coast and Turtle Island. Prediction of the water quality before and after construction was accomplished in order to find the preferable of three layouts from an environmental point of view. The existing Serangan Island is relatively small, with no tourism and inhabited by a small number of local people. The shallow waters around the island are covered by benthic vegetation. A coral reef to the east of Serangan Island forms a border to the ocean. The water quality in terms of benthic vegetation, concentrations of phytoplankton, nutrients, dissolved oxygen and water turbidity was modelled using the MIKE 21 eutrophication model. The water quality was predicted to improve in the strait between the coast and the island due to increased flushing of the dredged channels. On the other hand, the improved flushing resulted in a larger spreading of the nutrients and deterioration of the -water quality north and south of the proposed construction site. Lagoons proposed for leisure crafts also showed a deterioration of the water quality. For a lagoon close to a conservation area of the reef a large decrease in submerged vegetation was predicted. One layout was finally recommended as the optimal combining the various modelling results and results of other related studies.

7 citations

Journal ArticleDOI
TL;DR: In this article, the dynamics of benthic invertebrate communities in Muuga Bay was described in connection with large-scale dredging activities, and the spatial extent and duration of the effects were assessed by multivariate analysis and spatial modelling.
Abstract: The dynamics of benthic invertebrate communities in Muuga Bay was described in connection with large-scale dredging activities. The spatial extent and duration of the effects were assessed by multivariate analysis and spatial modelling. In general, dredging had moderate effects on benthic invertebrates both in space and time. Still, dredging resulted in an elevated biomass of bivalves, namely that of Macoma balthica. These bivalves were more impacted on flat bottoms compared to steep slopes.

7 citations

Book ChapterDOI
14 Sep 2016
TL;DR: In this article, the authors used predictive techniques to estimate the suspended solid concentration arising from dredges with different mechanisms of sediment release and to assess the spatial and temporal variability of the resulting plume in estuarine and coastal areas.
Abstract: In recent years, increasing attention has been paid to environmental impacts that may re‐ sult from resuspension, sedimentation and increase in concentration of chemicals during dredging activities. Dredging dislodges and resuspends bottom sediments that are not captured by dredge-head movements. Resuspended sediments are advected far from the dredging site as a dredging plume and the increase in the suspended solid concentration (SSC) can strongly differ, in time and space, depending on site and operational condi‐ tions. Well-established international guidelines often include numerical modelling appli‐ cations to support environmental studies related to dredging activities. Despite the attention that has been focused on this issue, there is a lack of verified predictive techni‐ ques of plume dynamics at progressive distances from the different dredging sources, as a function of the employed dredging techniques and work programs, i.e., spatial and temporal variation of resuspension source. This chapter illustrates predictive techniques to estimate the SSC arising from dredges with different mechanisms of sediment release and to assess the spatial and temporal variability of the resulting plume in estuarine and coastal areas. Predictive tools are aimed to support technical choices during planning and operational phases and to better plan the location and frequency of environmental moni‐ toring activities during dredging execution.

7 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023189
2022438
202170
2020119
2019150
2018131