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Showing 1 to 20 of 28 for “"Estuarine waters"”.
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Numerical Modelling of Geomorphological Processes in Estuarine Waters
… in rivers, estuaries, harbours and coastal waters is an efficient means of predicting bed level changes for further use in planning the maintenance and management of these areas. Nowadays, quasi-3D models are increasingly popular, particularly with the rapid progress in the power of modem …
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In situ monitoring and biogeochemical cycling of nutrients in estuarine waters
… methods for nutrient determinations in natural waters are also evaluated. Chapter Two reports the use of chemometrics to determine trends in historical time-series physicochemical datasets {e.g. nitrate+nitrite, phosphate, river flow, precipitation, suspended solids, water temperature and …
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Measuring Bioavailable Copper in Estuarine Waters using an Ion Exchange Resin
… of weakly bound and strongly bound copper in estuarine waters and agricultural drainage. Copper bound to an ion exchange resin has been operationally defined as bioavailable copper, or copper that is available for uptake by aquatic organisms. Initial laboratory testing indicated that the …
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A finite element model of submarine ground water discharge to tidal estuarine waters
… ground water discharge to the intertidal zone of estuarine systems. This research may be the first attempt to model the ground water discharge process in a tidal estaurine system. The development of FEM Coast was undertaken as no existing ground model was capable of directly simulating the dynamic …
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Copper and Zinc Speciation in the Tamar Estuary
… speciation has not been studied in detail in estuarine waters. In addition, the effect of DOC on radionuclide contaminants in combination with trace metals has not been investigated in any waters. This is of particular interest in the estuarine environment, where both anthropogenic and natural …
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Aspects Of Reproduction And Diet In A Coastal South Carolina Population Of Longnose Gar, Lepisosteus Osseus
… of longnose gar (Lepisosteus osseus) in estuarine waters of South Carolina. There are very few studies examining longnose gar populations inhabiting esturaine environments and none in estuaries of South Carolina. Dietary data were pooled from all stomachs and analysis included; percent …
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Dissolved organic nitrogen in the river test and estuary
… of TN, seasonal variations and DON load entering estuarine waters from riverine sources.<br/><br/>An 18 month survey of the lower reaches of the River Test and upper estuary were conducted between July 2001 and December 2002 to investigate the temporal variation in nutrient concentrations. DON …
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An investigation of heavy metal tolerance and reproduction in Nereis diversicolor with reference to their use for biomonitoring
… responsible for contamination of coastal and estuarine waters. All stages of metal production are sources of contamination, the main contributors being acidic mine drainage waters and smelting works. Other major sources are industrial water discharges, sewage sludge, the atmosphere, shipyard …
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UNDERSTANDING THE FLOW DYNAMICS OF THE PEARL RIVER, MS, THROUGH HYDRODYNAMIC MODELING
… regulating conditions for oyster growth in estuarine waters. However, there are no flow measurement stations installed on East Pearl or West Pearl either at the river outlets or after the upstream bifurcation of the Pearl. This study aims to model the Lower Pearl River to understand the flow …
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Exploring the Influence of Diurnal Forcing on Tidal Inlet Exchange and the Impact on the movement of Oxygen Depleted Waters in the Mississippi Sound and Bight Region
… of the diurnal sea breeze on the flushing of estuarine waters onto the shelf.</p> <p>Results from these numerical experiments have provided a detailed perspective on flushing times and the impacts on the appearance of the poorly understood hypoxic event in the MSAB. The higher resolution …
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The Marine Geochemistry of Selenium
… of Se (IV) and total selenium in natural waters has been developed and optimized. The detection limit is about 20 pM for both analyses using a one liter sample. The precisions were about 2 % at 338 pM for Se (IV) and at 234 pM for total selenium.</p> <p>The concentrations of both total …
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A Comparison of Recruitment Strategies Among Brachyuran Crustacean Megalopae of the York River, Lower Chesapeake Bay and Adjacent Shelf Waters
… River, lower Chesapeake Bay and adjacent coastal waters were sampled from July through September 1980. The megalopa stages of 11 brachyuran species were sampled. Vertical and horizontal distributions are described for each species in relation to salinity and water column stratification. The …
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Geochemical controls on the distribution and composition of biogenic and sedimentary carbon
… microorganisms, in incubations of brackish estuarine waters, or as ferromanganese deposits in karstic cave systems rapidly associate with OC following precipitation. This association is stable despite Mn oxide structural ripening, suggesting that mineral-associated OC could persist during …
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Nutrient Distribution Effects from Freshwater Discharge at Franklin Lock and Dam (S-79) in 2005 and 2006 on the Caloosahatchee Estuary and San Carlos Bay, Fort Myers, Florida
… temporal scale. The assumption that upstream estuarine waters are potentially carrying nutrients downstream can only be conjectured for high flow rates. Low flow rates (less than approximately 28 m³ s-¹) corresponded to hypoxia during the summer months of 2006. The highest chlorophyll a …
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Geochemical controls on the distribution and composition of biogenic and sedimentary carbon
… microorganisms, in incubations of brackish estuarine waters, or as ferromanganese deposits in karstic cave systems rapidly associate with OC following precipitation. This association is stable despite Mn oxide structural ripening, suggesting that mineral-associated OC could persist during …
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The remediation of tributyltin-contaminated dredgins and waters
… were below or similar to the EQS for coastal and estuarine waters or freshwaters (2-20 ng/L TBT). A pilot investigation was carried out on a dockyard to evaluate the use of X-Ray fluorescence as a screening method for the presence of TBT in sediments. Due to tin contamination such a technique was …
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The ecology of two estuarine-dependent tonguefishes, the blackcheek tonguefish (Symphurus plagiusa) and the offshore tonguefish (S. civitatium), in coastal Louisiana
… and macroinvertebrates that utilize inshore estuarine habitat as nurseries during their early life histories. Current management plans designed to stabilize marsh elevations, such as freshwater diversions, may also influence the distribution and abundance of estuarine-dependent nekton. Given …
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Evaluation of Chelex 100 and Assessing the Impact of Fulvic Acid (NOM) on Copper Toxicity and Bioavailability to Americamysis bahia
… its ability to measure bioavailable copper in estuarine waters. Copper bound to the Chelex 100 resin was operationally defined as bioavailable copper. Varying initial copper concentration from 195 to 495 ug/L at a constant 12.5 mg/L natural organic matter (NOM) did not affect percent …
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Turbulence Modelling of Tidal Currents in Rectangular Harbours
… of currents and water levels in coastal and estuarine waters via the numerical solution of the depth- and layer-integrated Reynolds equations. As most flows in practice are always turbulent, it is necessary to try and model the turbulence as accurately as possible. Various turbulence models …
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A trace element study of sediments from the Olifants River estuary, the Berg River estuary, and the off-shore Mud Belt
… The mud belt cores were dated using 14C dating. Estuarine surface waters were analyzed for trace elements, pH, dissolved oxygen (DO), electrical conductivity (EC), and temperature. The trace elements arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) were focused on. The trace …
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