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Physicochemical Characteristics and Levels of Cu, Fe, Pb, Mn and Zn in Sediments of Agbarho River, Delta State, Nigeria
Published 2025-02-01“… Sediment qualities assessment to ascertain the impact of anthropogenic activities such as dredging, waste disposal, and abattoir effluent on the sediments of a river is very vital. …”
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42
Heavy Metal Distribution in Opportunistic Beach Nourishment: A Case Study in Greece
Published 2013-01-01“…Existing legislation regarding dredging activities in Greece appears insufficient for sustainable and environmentally friendly nourishment. …”
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43
Optimizing Self-Compacting Concrete through the Incorporation of Calcined Mud at 850°C
Published 2023-12-01“…To extend the lifespan of these structures, dam dredging is an essential solution. However, the extraction of enormous amounts of mud through the dam's bottom outlets, which remain unused, currently poses an environmental problem. …”
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44
The State of the Arctic Problems of the Nenets Autonomous Okrug and Prospects of their Solution
Published 2024-08-01“…The article analyses the activities on dredging on the Pechora River, construction of a highway, the development of oil and gas condensate mineral resource centers, based on the NAO fields, including the development of new ones. …”
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45
Numerical Simulation of the Effect of Long-Term Reclamation on the Flow and Sediment Concentration in Binhai Port,Yancheng
Published 2021-01-01“…Binhai Port is located at the most obvious corrosive coastline of the abandoned Yellow River delta in the north of Jiangsu Province,where the near-shore wave and flow dynamic is strong,the sediment movement is relatively active,the underwater terrain is complex and the slope erosion is obvious.Based on the measured hydrological and sediment data and a two-dimensional mathematical model for wave,tidal current and sediment,this paper quantitatively analyzes the influence of the long-term reclamation project on the flow and sediment concentration in the study area and the surrounding estuary,and emphatically discusses the back silting characteristics and deposition causes of the 300 000-ton channel during normal and rough weather.The results show that:After the implementation of the reclamation project,the flow and sediment characteristics of the study area don't change in a large scale,and mainly the flow and sediment near the project site is affected.The sediment is deposited after the channel dredging and a sediment deposit centered at the area with peak sediment concentration is formed in the channel,with decreasing deposition thickness to the port and outer sea channel.During rough weather,the maximum deposition thickness can reach 8~24 times of that in normal weather,but it is less than 0.2 m/d and there is no sudden silting and navigation blocking.…”
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46
Application of HF Radar in Hazard Management
Published 2016-01-01“…The time sequence of surface current maps enables Lagrangian tracking of small parcels of surface water, which enables hazard mitigation in managing suspended sediments in dredging, in emergency situations where flotsam and other drifting items need to be found, and in pollution control. …”
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47
Perspectivas ribeirinha sobre os impactos da construção de usinas hidrelétricas no rio Madeira em Rondônia
Published 2016-12-01“…During this same time period, the Madeira River has also undergone significant changes, with increased settlement and urbanization along its margins, hydraulic dredging for gold, and the development of the Madeira River Waterway. …”
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Reliability Analysis of Water Intake Based on MIKE Model
Published 2021-01-01“…The reliability of water intake is one of the main factors affecting the operation of the project,and is a prerequisite for the project to be put into use.Taking the 10 million-ton-level metallurgical new material industrial base in Wuzhou as the research object,based on the MIKE21 module in the MIKE software,this paper establishes a hydrodynamic model for verifying the reliability of the existing water intake scheme,as well as puts forward the corresponding countermeasures for the scheme with water intake risk.The results show that:①During the dry season,the water level of the Changzhou Water Control Project is relatively high,and the reservoir storage can meet the design water intake quantity of the project;②During the normal water period,the gates of Changzhou Water Control Project need to be opened to ensure the safety of flood control.If the inflow of the Shangxiaohe tributary of Xunjiang River is abundant,the project is guaranteed with water intake.If the inflow of the Shangxiaohe tributary is small,the project will have water intake risk;③Countermeasures such as dredging the river channel and lowering the water intake can effectively increase the water intake of the project,thereby avoiding the water intake risk of the project during the normal water period.The research results are of guiding significance for the construction of the 10 million-ton-level metallurgical new material industrial base in Wuzhou,and of theoretical significance for water intake reliability analysis through MIKE21.…”
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Les quais romains d’Aizier (Eure)
Published 2020-12-01“…This operation was also an opportunity to shed new light on a Roman iron anchor discovered near the site during 19th c. dredging work. This offloading station thus provides important evidence relative to harbor developments and restructuring, in connection with different berthing solutions and river current realities. …”
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50
Composition and Water Ecology Indication of Functional Feeding Groups of Zoobenthos in Liuxi River
Published 2022-01-01“…The Liuxi River is the most important river system in Guangzhou,and systematic monitoring and assessment provide basic information for the health management of the Liuxi River ecosystem.Field in-situ sampling of zoobenthos in the Liuxi River was conducted during the dry (March) and wet (September) seasons in 2019 to explore the spatio-temporal distribution characteristics of functional feeding groups (FFGs) of zoobenthos,and the habitat conditions of the Liuxi River were assessed by the composition of the zoobenthos FFGs.The results show that the main group of zoobenthos in the Liuxi River Basin is collectors,followed by scrapers and predators,whereas filterers and shredders are rarely observed.The dominant groups at the sampling sites in the upper and middle reaches are moderate pollution tolerant collectors (Baetidae and Corbiculidae) and pollution tolerant collectors (Chironomidae),while the sampling sites in the lower reaches are overwhelmingly dominated by pollution tolerant collectors (Chironomidae).Environmental factors significantly affect the distribution of zoobenthos FFGs.Specifically,the key environmental factors in the dry season are velocity and NO<sub>3</sub>,while those in the wet season are SiO<sub>2</sub> and velocity.The attributes of the Liuxi River ecosystem were analyzed on the basis of the composition of the zoobenthos FFGs.The results indicate that the ecosystems at most of the sampling sites in the Liuxi River are heterotrophic ones,and the riparian zone of this basin is not healthy.The longitudinal transport ability of the river is mostly in an unhealthy state.Predators' control effect is normal except at some sampling sites in the upper reaches.The basin maintains favorable habitat stability except at the sampling sites affected by sand dredging.…”
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Assessment of the Performance of <sup>210</sup>Pb-Based Dating Models with a Challenging Sediment History in Maryport Harbour (UK)
Published 2025-01-01“…The performance of the classical models, CFCS and CRS, and the novel TERESA is assessed with a 2 m long, high-resolution core sampled in Maryport Harbour, UK, by using raw data from the literature. It was affected by dredging, shortening, and by the anthropogenic impacts of radionuclides released by the Sellafield nuclear plant and the phosphate industry in Whitehaven and was considered non-datable by the <sup>210</sup>Pb method. …”
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Harbor Sedimentation Management Using Numerical Modeling and Exploratory Data Analysis
Published 2024-01-01“…Sedimentation in the harbors’ basins is an environmental phenomenon that frequently disrupts safe shipping and necessitates costly dredging operations. The layout of harbors and the permeability of protective structures such as breakwaters influence sediment transport within harbor basins. …”
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Major data gaps and recommendations in monitoring regulations of activities in EU marine protected areas
Published 2025-02-01“…Fishing, mining, or dredging/dumping activities were allowed in half of MPA area. …”
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Real time forecasting in the coastal zone: Stream power in the lower Mississippi River
Published 2025-02-01“…The Mississippi River Delta is the primary entrance to over 2300 miles of commercial waterway and faces year-round dredging and evolving unregulated natural outlets. …”
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Preliminary Evaluation of Some Engineering Geological Properties of Soils in the New Yenagoa Town, Bayelsa State, Central Niger Delta
Published 2013-07-01“…Therefore, adequate attention should be given to the likely physical environmental degradation of river bank failure and liquefaction condition that may evolve as a result of dredging/reclamation work in the area. J. Appl. Sci. …”
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Optimizing the Nuclear Concentration Measuring System of the Cutter Suction Dredger Using MCNPX Monte Carlo Code
Published 2024-12-01“…In using hybrid systems for this purpose, basic conditions such as online measurement capability, non-physical, chemical or environmental interference in the passing flow, compatibility with the operational conditions of temperature, pressure, humidity and vibrations in the dredging site, measurement accuracy should be met and safety principles should be considered. …”
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Preliminary Evaluation of Some Engineering Geological Properties of Soils in the New Yenagoa Town, Bayelsa State, Central Niger Delta
Published 2013-07-01“…Therefore, adequate attention should be given to the likely physical environmental degradation of river bank failure and liquefaction condition that may evolve as a result of dredging/reclamation work in the area. J. Appl. Sci. …”
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Toxicity of Per- and polyfluoroalkyl substances in elutriates prepared with estuarine and freshwater sediments
Published 2025-01-01“…To address data gaps concerning release of PFAS from sediment to the water column during dredged material aquatic placement or other sediment resuspension activity, we generated elutriates from PFAS-contaminated sediments. …”
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Evaluating multiannual sedimentary nutrient retention in agricultural two-stage channels
Published 2025-01-01“…Abstract The two-stage channel (TSC) design with a vegetated man-made floodplain has been recommended as an alternative to conventional re-dredging for managing suspended sediment (SS) and nutrient loads in agricultural streams. …”
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