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 20 of 121 for “"low salinity"”.
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Mechanistic Modeling, Design, and Optimization of Low Salinity Waterflooding
Low Salinity Waterflooding (LSW) is an emerging attractive enhanced oil recovery (EOR) method because of its oil recovery performance and relatively simple, environmentally friendly implementation, when compared with conventional high salinity waterflooding and EOR approaches. Most studies on the …
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Maturation Spawning and Larviculture of Atlantic Croaker (Micropogonias undulatus) at Low Salinity
… maturation, spawning, and larval culture at high salinity. This protocol prevents the direct use of coastal water for culture along the Mississippi Gulf coast where salinity is low. This study examined the feasibility of performing hatchery production of Atlantic Croaker at low salinity.</p> …
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Novel insights into low salinity water flooding enhanced oil recovery in sandstone reservoirs
… improved oil recovery (IOR) techniques, such as low salinity (LS) waterflooding. Also, the reduction in reservoir energy and the friendly environmental aspects of low salinity water flooding (LSWF) provide additional incentives for its use. That LS water requires decreasing only the active …
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Phytoplankton Dynamics in the Very Low Salinity Region of the James River Estuary, Virginia, U.S.A.
… was a peak phytoplankton biomass in the very low salinity region (defined as the location where surface salinity measured less than 0.5$ 0/00) and this peak represented five to ten times greater biomass than adjacent waters. The peak biomass occurred independent of the tidal state and the …
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Role of sulphates and chloride ions in improved oil recovery in a hybrid smart-low salinity flooding technique
… of versatility and wide scale applicability is Low salinity flooding, which is characterised by many mechanisms including fine migration, electrical double layer expansion, multivalent ionic exchange, and micro dispersion. Despite much research on theses mechanisms, sulphate ions facilitate the …
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Experimental study on enhanced oil recovery (EOR) mechanisms of nanogel combining with low salinity water for carbonate reservoirs
… and the synergetic effect between nanogel and low salinity water. Nanogel used in this study was synthesized through the suspension polymerization process in our lab. The morphology, size distribution, and zeta potential were studied for nanogel dispersed in brine with variable ionic strength. …
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The Effect of the Chemical Composition of Low Salinity Water on the Growth, Development, and Survival of Cultured Juvenile Blue Crabs
… for survival, growth and development in low salinity water containing various compositions of ions. ~rabs were isolated in separate containers and placed in thirty gallon aquaria containing 2ppt of ion solution. Temperature, ambient, humidity, and nitrite levels were monitored daily. …
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EXAMINING THE GENETIC BASIS AND PHYSIOLOGY OF SURVIVAL IN EXTREME LOW SALINITY TO IMPROVE AQUACULTURE OF THE EASTERN OYSTER Crassostrea virginica
… expose coastal aquaculture operations to extreme low salinity (< 5), resulting in reduced productivity and mortality. The primary objectives of this dissertation were to investigate the biology and genetic basis of low salinity tolerance to improve eastern oyster aquaculture. In Chapter 2, I …
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Comprehensive evaluation of a novel EOR method-coupling low salinity water flooding and preformed particle gel to enhance oil recovery in fractured reservoirs
… of oil from carbonate reservoirs is usually low due to their extreme heterogeneity caused by natural fractures and the nature of oil-wet matrix. Also, oil recovery from fractured sandstone reservoirs is often low due to areal heterogeneity. Gel treatments have proven to be a successful and …
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SUBMERGED AQUATIC VEGETATION IN A LOW-VISIBILITY LOW-SALINITY ESTUARY IN NORTH CAROLINA: IDENTIFYING TEMPORAL AND SPATIAL DISTRIBUTIONS BY SONAR AND LOCAL ECOLOGICAL KNOWLEDGE
… the distribution and status of SAV in higher salinity, less turbid regions have been better documented than in turbid, low-salinity waters. Hence, much less is known about the status and trends of low-salinity SAV. The objectives of this dissertation were to document SAV abundance, …
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Patterns of Evolutionary Conservation and Divergence in the Short-Term Hyposalinity Stress Response of a Euryhaline Diatom, Skeletonema marinoi
… Diatoms may constitute one such lineage, as salinity tolerance among extant species is diverse, and the observation of frequent historic habitat transitions between marine and freshwater environments indicates that diatoms successfully mitigated (low) salinity stress in the past, followed by …
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Physical Processes that Affect Hypoxia in the Thames River Estuary, USA
… but the evolution and variability of the low-oxygen levels have not been effectively shown through prior observations. Developing a further understanding of these conditions may help explain seasonal ecosystem patterns in the Thames River and Long Island Sound. An observational program was …
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Evaluating the resilience of Antarctic echinoderms to Southern Ocean freshening: Short- and long-term responses
… sea-ice cover, and freshening—the reduction in salinity caused by freshwater input. Salinity is a crucial environmental factor that affects the development, growth, reproduction, and survival of aquatic organisms. While the effects of warming, acidification and loss of sea ice cover on Antarctic …
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Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media
… space. This effect was observed during high-salinity water injection in cores with low kaolinite concentrations. This model is also extended to account for the presence of a residual phase. Compared with fines migration under single-phase flow, having a residual phase significantly reduces …
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ESTIMATION OF QUANTITATIVE GENETIC PARAMETERS OF THE EASTERN OYSTER (CRASSOSTREA VIRGINICA) IN THE GULF OF MEXICO
… programs. Gulf habitats feature diverse salinity environments that may require oysters bred for habitat-specific optimal genetic characteristics. In this work, genetic parameters for performance in habitats with different salinity were estimated. In September 2020, 102 males and 102 …
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The Effects of Salinity on Zootechnical Performance of Spotted Seatrout (<i>Cynoscion nebulosus</i>) in Recirculating Aquaculture Systems
… production challenging in areas where high salinity water is not available. This study aimed to document the effects of salinity on zootechnical performance of spotted seatrout embryos, early larvae, and juveniles in recirculating aquaculture systems to assist with the development of …
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Phytoplankton Ecology and Dynamics in the James River Estuary Virginia, U. S. A.
… 1982. Particular emphasis was placed on the very low salinity region (defined as the location where surface salinity measured between 0.0 and 0.75 o/oo based on conductivity) in order to determine the fate of fresh water phytoplankters upon being advected into the estuary because of their …
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Investigating the Response of the Eastern Oyster (Crassostrea virginica) to Low Dissolved Oxygen Conditions
… microxia occur when DO decreases to ≤ 2 mg/L. Salinity and temperature changes resulting from large-scale freshwater influx have been identified as key factors influencing the oyster populations in the Mississippi Sound. It is important to investigate the impacts of DO conditions on oyster …
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Variability of currents in Great South Channel and over Georges Bank : observation and modeling
… shows (1) the seasonal evolution of the surface low salinity plume, (2) the threedimensional structure of residual flow, and (3) a coherent relationship between the surface low salinity plume and high concentration of zooplankton. In part II, the numerical model of Georges Bank shows that as the …
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