Sediment Profiling Articles & Analysis
13 articles found
Surface monitoring detects bloom formation at intake locations and high risk zones. Water Column Profiling: The Vertical Profiler descends through the water column to collect depth-resolved data for temperature, DO, chlorophyll-a, and phycocyanin, revealing stratification patterns and bottom-layer conditions. When the hypolimnion becomes anoxic and phosphorus ...
Introduction In the industrial dredging sector, Italy has many situations where basin maintenance, sediment removal, and upstream cleaning are vital. These actions ensure operational efficiency, safety, and environmental protection. In this case study, we analyze a Dragflow project in Italy. We highlight the main technical challenges, the chosen technology, the execution, and the final ...
A full scale model was developed to test a circular (300 mm inner diameter) and an equivalent area egg-shaped plastic pipe under controlled experimental conditions (pipe slope 2–5‰, averaged discharge Q = 4 L/s). Velocity profiles and sediment accumulation in the pipe invert was daily measured. Within the 7–11 days, the average sediment ...
Abstract New data on sediment transport in a river are reported using a LISST-SL laser diffraction instrument that simultaneously measures velocity, optical transmission, depth, temperature, and sediment particle size distribution (PSD) isokinetically. ...
In the current study, a DGT technique was applied to measure total mercury (Hg) and monomethylmercury (MMHg) concentrations in lake and coastal sediment pore waters and to compare them with those from ex situ sediment centrifugation. To calculate the total Hg and MMHg concentrations in pore water using the DGT method, the diffusion coefficients of Hg species in a ...
As a result of long‐term metal mining and metallurgical activities, the sediment of Ross Lake (Flin Flin, MB, Canada) is highly contaminated with metals and other elements. ...
The uncertainty associated with model predicted TMFs was evaluated against realistic ranges for model inputs (water and sediment PCB contamination) and variation in environmental, physiological, and ecological parameters included within the model. Finally, the model was used to explore interactions between spatial heterogeneity in water and sediment contaminant ...
Within lakes, approximately 50% of sediment Se was in the form of elemental Se, although this ranged from 0 to 81% among samples. This spatial variation in elemental Se was positively correlated with finer particles (less sand) and percent total organic carbon content in sediments. Other Se species detected in sediments included selenosulfides, ...
This work systematically studied the distribution profile (water-suspended particulate-sediment-porewater) of PMs in Haihe River, China. ...
This study chronologically dated three sediment profiles collected at the mouth of the Amazon River using the 210Pb geochronology method. All profiles were sliced into 5 cm layers and analysed for radionuclides through gamma spectrometry. The results obtained dated the sediments as far back as 65 years. The ...
Little is known about the effects of upland sediment deposition on C dynamics within riparian wetlands. To assess sedimentation impact, we obtained profile samples of wetland soil and used the combination of 137Cs, 210Pb, and 14C chronological markers to determine rates of C sequestration and mineral deposition over the history of a wetland ...
Abstract: Perylene and penta-aromatic hydrocarbons were determined in sediments as part of a study that was dedicated to the aquatic ecosystem of Elelenwo Creek (Southern Nigeria) in order to carry out a critical corroboration of occurrence and diagenetic evolution of perylene in the sediments of the creek. ...
The distribution profiles and pathways of polynuclear aromatic hydrocarbons in the surroundings of Ruseifa landfill area in Jordan were investigated for surface sediments, leachate, and groundwater. The total concentration of 16 polycyclic aromatic hydrocarbons (PAHs) in sediments ranged from 286 to 1704 ppm with an average value of 751 ppm. ...