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Showing 1 to 15 of 15 for “"Coastal aquifer"”.
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Fluid and Pressure Dynamics in Natural and Engineered Coastal Aquifer Systems
Coastal aquifers are increasingly impacted by groundwater depletion, seawater intrusion, and land subsidence driven by long-term pumping. This dissertation uses 3D numerical modeling to evaluate how variable-density flow and geological heterogeneity influence pressure response, intrusion geometry, …
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Assessment of coastal aquifer contamination using geochemical and health risk assessment in Maputaland formations, South Africa
The Maputaland coastal plain of KwaZulu-Natal is among the popular tourist areas in South Africa. Groundwater is the foremostsource for drinking and irrigation abstracted from the unconsolidated aquifers where the infiltration rate is very high. This could possibly increase the risk of aquifer …
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The Digital Simulation of Areal Salt Transport to Evaluate Water Management Proposals in a Coastal Aquifer
Made available in DSpace on 2014-12-14T07:10:53Z (GMT). No. of bitstreams: 1 7915314.pdf: 7363335 bytes, checksum: 914d42e4735d0a85b083ea08eff1d5cc (MD5) Previous issue date: 1979
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Risk analysis and mitigation of seawater intrusion for the Gaza strip coastal aquifer under climate induced changes
Coastal aquifers are in hydraulic contact with the sea; prolonged overpumping of groundwater can lead to inland encroachment and/or vertical up-coning of the interface (transition or mixing zone) between these regimes, causing salt contamination of freshwater aquifers. In the Mediterranean area, …
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Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
Excess nitrogen input is deleterious to coastal waters, resulting in deterioration of the water quality, increases in harmful algal blooms and disease in commercial fish stocks. A significant portion of this nitrogen enters coastal waters through groundwater systems. Here we use isotopic and …
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Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
Excess nitrogen input is deleterious to coastal waters, resulting in deterioration of the water quality, increases in harmful algal blooms and disease in commercial fish stocks. A significant portion of this nitrogen enters coastal waters through groundwater systems. Here we use isotopic and …
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Long-term management and discounting of groundwater resources with a case study of KukioÌ HawaiiÌ
… model is constructed for a dual coastal and high-level aquifer system at Kuki'o, Hawai'i. The high-level aquifer is modeled as a leaky bucket, while the coastal aquifer is modeled using a sharp-interface formulation of the basal lens. Salinization of pumping wells due to saltwater …
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Modeling injection and extraction wells for seawater desalination in SEAWAT
… enter the system. Subsurface systems leverage coastal aquifers as natural filters, increasing the effective flow field for seawater extraction and brine disposal, and are proven to reduce impacts on the coastal environment. In this study, we developed groundwater models in SEAWAT, a …
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Barrier island groundwater dynamics
… along the U.S. Atlantic and Gulf Coasts and coastal groundwater dynamics influence the availability of freshwater, ecosystem health, pollutant transport, and flooding in these densely populated communities. However, groundwater dynamics, including the aquifer head distribution and subsurface …
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Tide-influenced contaminant transport in coastal aquifers
Coastal aquifers are distinguished from other aquifers because of tidal effects which cause complicated groundwater flow and contaminant transport phenomena in regions immediately adjacent to the coast. This study is designed to address the significance of tidal influence on contaminant transport …
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MONITORAGGIO DEI PROCESSI DI INQUINAMENTO DELLE ACQUE DI FALDA DA ATTIVITÀ AGRICOLE INTENSIVE.
L‘uso improprio di fertilizzanti e pesticidi nell'agricoltura intensiva, può causare danni all'ambiente, in particolar modo alle produzioni, al suolo e all'acqua. L’attività svolta è servita a valutare la contaminazione delle acque sotterranee a causa di pratiche agricole intensive (coltivazioni …
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Geohydrological studies of the Western Shores of lake St Lucia
… within their catchments. In this study the aquifer system of the southern portion of the western shores area of Lake St Lucia is delineated with the specific intention of defining the coastal geohydrology of the western shores in order to determine its contribution to the water balance of …
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Assessing Aquifer Vulnerability to Seawater Intrusion : Application of the GALDIT-Index to the Emilia-Romagna Coastline.
Saltwater intrusion (SWI) in coastal aquifers due to excessive groundwater withdrawals (for civil, agricultural and industrial purposes) has become a major concern affecting a large number of coastal aquifers worldwide. This trend is expected to grow in the very near future due to the expected …
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The use of subsurface physical barriers to control seawater intrusion in heterogeneous coastal aquifers: experimental and numerical study
… intrusion in multi-layered heterogeneous aquifers. The sixth chapter provides and insight on the impact of layered heterogeneity on the ability of subsurface dams to control seawater intrusion. The seventh chapter demonstrates the viability of the MPB and compares its effectiveness to …
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Coastal hazards assessment and sustainable management in Essaouira (Morocco): hydrogeological, hydrological, geophysical, geomorphological, and geotechnical approaches
A província de Essaouira, no litoral de Marrocos, enfrenta um conjunto complexo de riscos naturais e induzidos pelo homem. Em resposta a estes desafios, foi efetuado um estudo abrangente para avaliar os riscos em Essaouira, analisar a dinâmica dos perigos e propor medidas de atenuação específicas. …