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Showing 1 to 20 of 489 for “"estuary"”.
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Freshwater requirements of Knysna Estuary
… a 1-dimensiona~ mathematical model of the Knysna Estuary. The model showed that the salinity would rise to 36 parts per thousand at the Old Drift if the · river flow was stopped altogether. The model also shows that salinities drop to 1 or 2 parts per thousand at the National Road Bridge for three …
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Turbulence Spectra in a Well-Mixed Estuary
… some of the turbulent process in a well-mixed estuary. The processes are identified by the study of turbulent velocity fluctuations. These velocity records have been analyzed using standard digital methods to obtain spectral density, spectral energy, and cross-spectra of velocity. In order to …
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Phytoplankton Ecology in the Skidaway River Estuary
… concentrations within the Skidaway River Estuary (Chapter 3). Both microscopy and molecular analysis were used to examine species make-up. To characterize short-term and seasonal variation in the phytoplankton assemblage, three, two-week intensive field samplings were conducted following …
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Natural and anthropogenic influences on recent sediment characteristics in the Knysna Estuary, South Africa and Yangtze River Estuary, China
… Island tidal flats of the Yangtze River Estuary in China and the Knysna Estuary in South Africa are selected as case studies. The objective of this study is to investigate the recent distribution and abundance of sediment characteristics, organic matter, and modern major and trace …
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Sediment deposition in the lower Hudson River estuary
… data collected from the Lower Hudson River estuary to identify the depositional response of the estuary to high river discharge events. Erosional and depositional environments in the estuary are identified through the use of side-scan sonar, bottom penetrating sonar and surficial sediment …
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The macrobenthos of the Mlalazi estuary: KwaZulu-Natal
The Mlalazi estuary situated in the Mlalazi Nature Reserve is regarded as one of the least spoiled estuaries on the KwaZuIu-Natal coast, with the relatively unspoilt character being enhanced by the location of the estuary in a marine protected area (MPA). Available information of the biota of the …
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The Hydrodynamic and Estuarine Physics Of Maketu Estuary
Maketu Estuary is situated -35 km southeast of Tauranga in the central Bay of Plenty, New Zealand. The hydrodynamics of the estuary was drastically altered when the large Kaituna River was diverted directly to the sea in 1957 as a part of the flood protection scheme. This dramatically changed the …
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Copper and Zinc Speciation in the Tamar Estuary
… μm filter fractions of samples from the Tamar Estuary were determined during seasonal transects made over a calendar year. Samples were taken over a full salinity range (0-35) and from locations thought to contain DOC from a variety of sources (e.g. terrigenous, biogenic, sewage). No seasonal …
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Geochemistry of suspended particles in the Tamar estuary
… sediments and suspended particles from the Tamar Estuary show little variation in REE concentrations along the estuary and only minor fractionation relative to standard shale. Fe, Mn, Cu, Zn, Ni & Co abundances in the estuarine suspended particles show significant variations in the turbid upper …
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Recovery of the Mersey Estuary from Metal Contamination
The Mersey Estuary has received significant quantities of industrial wastes and sewage over several decades. Although contaminant loads are reducing and the estuary is showing signs of recovery, the sediment reservoir remains a repository of historical contamination and still contains high …
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An environmental study of the Lourens River estuary
An environmental study of the Lourens River estuary was completed, whereby field surveys were undertaken and all available knowledge was collated. The Lourens estuary is a small system opening into False Bay, Southwestern Cape; it is almost entirely enclosed within AECI security fences and access …
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Long-term changes in a small, urban estuary
The Diep River estuary is a small, urban estuary situated in the suburbs of Cape Town and has been subjected to long-term modifications and abuse that far exceeds that of most other estuaries around South Africa. Activities in the Diep River catchment, together with the intensive urban development …
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Sediment deposition in the lower Hudson River estuary
Thesis (S.M. in Civil and Environmental Engineering)--Joint Program in Applied Ocean Physics and Engineering (Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and the Woods Hole Oceanographic Institution), 1999.
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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
Trace elements have received increased attention since the mid-1900's. Although some studies have investigated trace element accumulation as a result of urban expansion in the Western Cape, South Africa, few have catalogued the accumulation and behavior of trace elements resulting from agricultural …
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Mechanisms of tidal dispersion in a salt marsh estuary
… (Marshfield, MA), a tidally-dominated salt marsh estuary with complex topography. First, a field campaign was conducted to determine the dispersion associated with the out-of-phase exchange between tributary creeks and the main channel. Then, numerical simulations of an idealized estuary were …
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Macrobenthic community and ecotoxicological status of the Nhlabane Estuary
The Nhlabane Estuary is a small temporary open/closed estuary along the Northern KwaZulu-Natal coastline, 40 km north of Richards Bay. Historically, the Nhlabane Estuary formed the tidally influenced lower reaches of the Nhlabane coastal lake system, but in 1978, its connection with the coastal …
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Dissolved organic nitrogen in the river test and estuary
… 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 concentrations up to 152 µM were measured in saline samples and concentrations of up to 100 µM were recorded in …
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Factors Effecting Phytoplankton Assemblages in the Lafayette River Estuary
<p>Chemical and physical parameters were measured with phytoplankton species composition and abundance in the Lafayette River from August to October 1981. Stations located in four distinct areas of the river were statistically analyzed to determine data relationships. Environmental factors …
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Managed realignment in the Humber estuary: factors influencing sedimentation
… was breached on the north bank of the Humber estuary at Paull Holme Strays (PHS). The site was breached as part of the Environment Agency Humber Flood Risk Management Strategy, with the main aims to create intertidal habitat to replace that which has been lost in other areas of the estuary and …
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