Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"freshwater-discharge"”.
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Effects of shoreline development and freshwater discharge on nekton assemblage and trophic structure in a northern Gulf of Mexico estuary
… within Biloxi Bay, Mississippi, during a high freshwater discharge (HFD) period by comparing nekton assemblage (using species richness, Shannon-Wiener diversity, and relative abundance), trophic structure (using physical diets and stable isotope analysis), and their responses to abiotic shifts …
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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
Nutrient distribution correlates with discharge of freshwater from Franklin Lock and Dam structure (S-79) by delivery into the Caloosahatchee Estuary (CE) and out of this area, including the surrounding San Carlos Bay (SCB) and adjacent West Florida Shelf. This study analyzed the temporal and …
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Hydrographic Variability on Decadal and Interdecadal Scales in the Northern Gulf of Alaska
… wind stress, solar heating, precipitation, and freshwater discharge. The 25 years of hydrographic data allow the determination of interannual variations in the MLD. The MLD trend over this period is for a slight increase in the MLD that is not statistially significant. This is in contrast to …
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Influence of Natural and Anthropogenic Environmental Variability on Larval Fish Diet, Growth, and Condition in the Northcentral Gulf of Mexico
… Gulf of Mexico experiences high levels of freshwater runoff annually from various sources including the Mississippi River and Mobile Bay, among other sources. Early life history stages of fishes are especially vulnerable to environmental variability created by freshwater discharge. The …
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Mixed Layer Dynamics Along the Seward Line in the Northern Gulf of Alaska
… This annual cycle is primarily in response to freshwater discharge, winds and solar insolation. On longer timescales, four forcing mechanisms have been identified: the direct interaction of freshwater discharge and winds; an estuarine-type circulation controlled by freshwater discharge and …
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Reconstruction of the East Asian monsoon variability since the mid-Holocene from the Pearl River estuary, southern China
… an estuary include river-derived terrestrial/freshwater input, in situ brackish-water suspended sediment and tide-derived marine input. This study assumes the three proxies can help differentiate sources of sediments relating to monsoon-driven freshwater flux and help reconstruct monsoonal …
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Modeling Environmental Effects on MSX Prevalence and Intensity in Eastern Oyster (<i>Crassostrea virginica</i>) Populations
… the effect of increased or decreased spring freshwater discharge, the timing of high freshwater runoff, the presence or absence of a fall or late spring phytoplankton bloom, and the occurrence of a warm winter on MSX prevalence and intensity in Delaware Bay oyster populations. Model …
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The future of Narsap Sermia: Documenting the retreat of a tidewater glacier in Southwest Greenland
… Between 1987 and 2022, the volume of ice discharged from NS increased by 45%, a rate more than double the Greenlandic mean. This destabilization led to retreat events occurring in three distinct episodes: 2004-2005, 2010-2012, and 2019-2021. The study identified that changes in subglacial …
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Observing Seasonal Cycles in Greenhouse Gas Fluxes with Automatic Flushing Chambers in a Low-Arctic Lake
… and some environmental parameters. Specifically, freshwater discharge, was positively linked to CO₂ emission at all sampling locations. Methane concentrations were too low for accurate flux estimates using the low-cost CH₄ sensors, as the readings were dominated by humidity-related noise. Future …
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Inferring subglacial hydrology from investigations of supraglacial lake drainages and meltwater plumes at Store Glacier, West Greenland
… each have unique subglacial drainage systems and discharge meltwater into adjacent fjords differently. However, studies of the subglacial hydrology of individual tidewater glaciers have been limited, largely due to the difficulty in obtaining direct measurements. The input of water to the …
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A numerical study of the interaction of tidal flows in the Mersey estuary and Liverpool bay
… at the open boundary of the bay model and freshwater discharge from the Mersey estuary into Liverpool bay. The relevant results obtained from the numerical model have been compared with the data reported according to the observations and have shown good agreement with the data. It is shown …
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Nutrient and Carbon Dynamics in the Chesapeake Bay Outflow Plume and Their Effect on the Coastal Ocean Environment
… consistently from the north accompanied by high freshwater flow from the Bay, delivered high amounts of chlorophyll from the Bay. In contrast, two types of diffusive plumes occurred when winds came from the south accompanied with low freshwater discharge and were either influenced by estuarine or …
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The Impacts of External Nutrient Sources on Marine Phytoplankton in an Eastern Shore Sea-Side Estuary
… dominated by large river systems. Instead, small freshwater creeks influence many coastal systems yet little information has been documented on their ecological significance. The focus of this research is to identify the biogeochemical and physical interactions within an estuarine water-column and …
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Annual and Interannual Variability in the Wind Field and the Hydrography Along the Seward Line in the Northern Gulf of Alaska
… of local forcing such as winds, coastal freshwater discharge, eddies, fronts and remote forcing like El Niño-Southern Oscillation. Until now, the influence of winds on the system has been calculated using coarse resolution upwelling index data or spatially sparse buoy data. The coarse …
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Trace Metal-Particle Water Interactions in the Western North Sea
… coastal zone were significantly influenced by freshwater discharge, tidal regime at the mouth of the estuary and prevailing wind conditions Total trace metal fluxes across the mouth of the Humber Estuary were highest during spring (311, 8 96 & 1045 kg day-1, for Cu, Cd and Pb respectively) and …
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Nutrient dynamics in shallow tidally-dominated estuaries
… to differentiate between competing sources (freshwater inflows, wind mixing and sediment fluxes) of DIN input into Te Puna and Waikareao estuaries. From the scenarios, it was found that the inter-annual variation in concentration of nitrate is primarily driven by freshwater inflows, while …
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Investigating groundwater derived nutrient fluxes within Tauranga harbour, New Zealand
Submarine groundwater discharge (SGD) is one of the key pathways that connects land and ocean, delivering freshwater, nutrients, carbon, metals, and other chemical constituents to coastal waters. In New Zealand, local Māori have had a strong cultural connection to this natural process for …
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Stratigraphy, Sedimentology, and Ichnology of the Middle Cambrian to Lower Ordovician Deposits in Subsurface Western Canada
… of stressors in delta settings, most notably freshwater discharge and high sediment supply. The middle Cambrian to Lower Ordovician succession records a complex depositional history involving several relative sea-level changes. At least two third-order sequences have been recognized. The lower …
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Hydrodynamic and sediment transport numerical modelling and applications at Tairua Estuary, New Zealand
… behaviour in the estuary were modified by river discharge, with increasing discharge resulting in increased ebb dominance and export of sediment from the estuary. Further, as river discharge increased, the estuary became more stratified, particularly during periods of low tidal velocities. …