Academic literature on the topic 'Estuaire inverse'

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Journal articles on the topic "Estuaire inverse"

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Descroix, Luc, Yancouba Sané, Mamadou Thior, et al. "Inverse Estuaries in West Africa: Evidence of the Rainfall Recovery?" Water 12, no. 3 (2020): 647. http://dx.doi.org/10.3390/w12030647.

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In West Africa, as in many other estuaries, enormous volumes of marine water are entering the continent. Fresh water discharge is very low, and it is commonly strongly linked to rainfall level. Some of these estuaries are inverse estuaries. During the Great Sahelian Drought (1968–1993), their hyperhaline feature was exacerbated. This paper aims to describe the evolution of the two main West African inverse estuaries, those of the Saloum River and the Casamance River, since the end of the drought. Water salinity measurements were carried out over three to five years according to the sites in or
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Shaha, Dinesh Chandra, Yang-Ki Cho, Bong Guk Kim, M. Rafi Afruz Sony, Sampa Rani Kundu, and M. Faruqul Islam. "Spatiotemporal variation of Van der Burgh's coefficient in a salt plug estuary." Hydrology and Earth System Sciences 21, no. 9 (2017): 4563–72. http://dx.doi.org/10.5194/hess-21-4563-2017.

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Abstract. Salt water intrusion in estuaries is expected to become a serious global issue due to climate change. Van der Burgh's coefficient, K, is a good proxy for describing the relative contribution of tide-driven and gravitational (discharge-driven and density-driven) components of salt transport in estuaries. However, debate continues over the use of the K value for an estuary where K should be a constant, spatially varying, or time-independent factor for different river discharge conditions. In this study, we determined K during spring and neap tides in the dry (< 30 m−3 s−1) and wet (
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Lorenz, Marvin, Knut Klingbeil, and Hans Burchard. "Impact of Evaporation and Precipitation on Estuarine Mixing." Journal of Physical Oceanography 51, no. 4 (2021): 1319–33. http://dx.doi.org/10.1175/jpo-d-20-0158.1.

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AbstractRecent studies could link the quantities of estuarine exchange flows to the volume-integrated mixing inside an estuary, where mixing is defined as the destruction of salinity variance. The existing mixing relations quantify mixing inside an estuary by the net boundary fluxes of volume, salinity, and salinity variance, which are quantified as Knudsen or total exchange flow bulk values. So far, river runoff is the only freshwater flux included, and the freshwater exchange due to precipitation and evaporation is neglected. Yet, the latter is the driving force of inverse estuaries, which c
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BITTENCOURT, ABÍLIO C. S. P., GUILHERME C. LESSA, JOSÉ M. L. DOMINGUEZ, LOUIS MARTIN, GERALDO S. VILAS BÔAS, and FÉLIX F. FARIAS. "High and low frequency erosive and constructive cycles in estuarine beaches: an example from Garcez Point, Bahia/Brazil." Anais da Academia Brasileira de Ciências 73, no. 4 (2001): 599–610. http://dx.doi.org/10.1590/s0001-37652001000400013.

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Monitoring of the morphodynamic variations of the beaches associated with an estuary contiguous with Garcez Point, Bahia, Brazil, and the superposition of aerial photographs from the region, show the presence of distinctive erosive and constructive cycles of low and high frequencies. Between 1959 and 1989, one event of shoreline erosion and progradation was recognized on the oceanic beaches just outside the estuary. Inside the estuary, an erosion phase at the southern margin coincides with a constructive phase at the other side, and vice-versa. On the southern estuarine beach, low-frequency cy
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Miller, A. Whitman, Jim R. Muirhead, Amanda C. Reynolds, Mark S. Minton, and Karl J. Klug. "High-frequency continuous measurements reveal strong diel and seasonal cycling of pCO2 and CO2 flux in a mesohaline reach of the Chesapeake Bay." Biogeosciences 21, no. 16 (2024): 3717–34. http://dx.doi.org/10.5194/bg-21-3717-2024.

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Abstract. We estimated hourly air–water gas transfer velocities (k600) for carbon dioxide in the Rhode River, a mesohaline sub-estuary of the Chesapeake Bay. Gas transfer velocities were calculated from estuary-specific parameterizations developed explicitly for shallow microtidal estuaries in the mid-Atlantic region of the United States, using standardized wind speed measurements. Combining the gas transfer velocity with continuous measurements of pCO2 in the water and in the overlying atmosphere, we determined the direction and magnitude of CO2 flux at hourly intervals across a 3-year record
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Panfili, Jacques, Jean-Dominique Durand, Khady Diop, Béatrice Gourène, and Monique Simier. "Fluctuating asymmetry in fish otoliths and heterozygosity in stressful estuarine environments (West Africa)." Marine and Freshwater Research 56, no. 5 (2005): 505. http://dx.doi.org/10.1071/mf04138.

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Fluctuating asymmetry (FA) is assumed to reflect the developmental instability caused by environmental or genetic stress. Fish otoliths represent a very good tool for investigating the consequence of different effects on FA. Otolith FA analysis, coupled with genetic analysis, has been undertaken on two common West African estuarine species, Ethmalosa fimbriata (EFI) and Sarotherodon melanotheron (SME), in two neighbouring estuaries, in order to highlight the impact of salinity on developmental stability. The Gambia estuary has a normal functioning and the Saloum estuary is inverse (saltier wat
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Hofmann, A. F., F. J. R. Meysman, K. Soetaert, and J. J. Middelburg. "Factors governing the pH in a heterotrophic, turbid, tidal estuary." Biogeosciences Discussions 6, no. 1 (2009): 197–240. http://dx.doi.org/10.5194/bgd-6-197-2009.

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Abstract. A method to quantify the influence of kinetically modelled biogeochemical processes on the pH of an ecosystem with time variable acid-base dissociation constants is presented and applied to the heterotrophic, turbid Scheldt estuary (SW Netherlands, N Belgium). Nitrification is identified as the main process governing the pH profile of this estuary, while CO2 degassing and advective-dispersive transport "buffer" the effect of nitrification. CO2 degassing accounts for the largest proton turnover per year in the whole estuary. There is a clear inverse correlation between oxygen turnover
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Medeiros, AMA, JEL Barbosa, PR Medeiros, RM Rocha, and LF Silva. "Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)." Brazilian Journal of Biology 70, no. 3 (2010): 551–57. http://dx.doi.org/10.1590/s1519-69842010000300011.

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The present study aimed at evaluating differences in rotifer distribution in three estuarine zones in an inverse estuary located in the Semiarid Region of Brazil. Zones were chosen based on their proximity to the ocean and river border as a means of reflecting a horizontal salinity gradient. High freshwater discharge during the rainy season was the major determinant of rotifer composition. On the other hand, due to higher salinity values during the dry season, very low values of species richness and abundance were observed in all zones. Therefore, the study highlights the constraints of salini
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Cai, Huayang, Ping Zhang, Erwan Garel, et al. "A novel approach for the assessment of morphological evolution based on observed water levels in tide-dominated estuaries." Hydrology and Earth System Sciences 24, no. 4 (2020): 1871–89. http://dx.doi.org/10.5194/hess-24-1871-2020.

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Abstract. Assessing the impacts of both natural (e.g. tidal forcing from the ocean) and human-induced changes (e.g. dredging for navigation and land reclamation) on estuarine morphology is particularly important for the protection and management of the estuarine environment. In this study, a novel analytical approach is proposed for the assessment of estuarine morphological evolution in terms of tidally averaged depth on the basis of the observed water levels along the estuary. The key lies in deriving a relationship between wave celerity and tidal damping or amplification. For given observed
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Burchard, Hans. "Combined Effects of Wind, Tide, and Horizontal Density Gradients on Stratification in Estuaries and Coastal Seas." Journal of Physical Oceanography 39, no. 9 (2009): 2117–36. http://dx.doi.org/10.1175/2009jpo4142.1.

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Abstract The aim of this one-dimensional water column study is to combine modified versions of three characteristic parameters for periodic tidal flow under the influence of a longitudinal buoyancy gradient—the horizontal Richardson number, the inverse Strouhal number, and the inverse Ekman number—into a parameter space study, including constant wind forcing from various directions. It is shown how the underlying dynamical equations can be cast into nondimensional form, depending mainly on these three nondimensional parameters plus the relative wind speed and the wind direction. Idealized mode
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Dissertations / Theses on the topic "Estuaire inverse"

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Sané, Babacar. "Ecophysiologie de l'arche (Senilia senilis), approche expérimentale pour une meilleure compréhension de ses traits d'histoires de vie dans l'estuaire inverse du Sine-Saloum." Electronic Thesis or Diss., Brest, 2024. http://theses-scd.univ-brest.fr/2024/These-2024-SML-Biologie_marine-SANE_Babacar.pdf.

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Dans l’estuaire inverse du Sine-Saloum (Sénégal), l’arche (Senilia senilis) est une espèce de bivalve clé pour les communautés de femmes qui les exploitent depuis des millénaires. Or, le manque d’informations sur sa biologie ne nous permet pas de prédire la réponse de l’espèce aux variations de ses conditions de vie, en particulier dans un contexte de changement global. Pour répondre à cette problématique, trois questions de recherche ont été posées : (1) Quelles sont ses limites de tolérance physiologique à la température et à la salinité ? (2) Quelles sont les variations saisonnières de sa c
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Gning, Cisse Ndombour. "Écologie trophique des juvéniles de quatre espèces de poissons dans l'estuaire inverse du Sine-Saloum (Sénégal) : influence des conditions de salinité contrastées." Montpellier 2, 2008. http://www.theses.fr/2008MON20151.

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L'estuaire inverse du Sine-Saloum (Sénégal) caractérisé par une situation de salinité aval-amont contrastée héberge de fortes populations de jeunes poissons. L'écologie trophique des juvéniles des espèces suivantes : Eucinostomus melanopterus, Ethmalosa fimbriata, Monodactylus sebae et Sarotherodon melanotheron, a été abordée par deux approches simultanées : la méthode d'analyse des contenus stomacaux et celle d'analyse des isotopes stables. La première approche a révélé que les jeunes poissons exploitent une grande communauté d'invertébrés dont la plupart est inféodé aux zones de mangroves et
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Riche, Olivier. "Time-dependent inverse box-model for the estuarine circulation and primary productivity in the Strait of Georgia." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37738.

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During 2002–2006, a comprehensive set of observations covering physical, biological, radiative and atmospheric parameters was obtained from the southern Strait of Georgia (SoG), Western Canada by the STRATOGEM program. Monthly time series of estuarine layer transports over 2002–2005 were estimated using a time-dependent 2-box model in a formal inverse approach. These transports are then consistent with the temperature and salinity fields, as well as riverine freshwater inflow (R) and atmospheric heat fluxes. Uncertainty was analyzed by resampling observations using bootstrap methods. The trans
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Lima, Edgar Barbosa. "Problemas inversos aplicados à identificação de parâmetros hidrodinâmicos de um modelo do estuário do rio Macaé." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3913.

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Fundação Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro<br>Esta tese tem por objetivo propor uma estratégia de obtenção automática de parâmetros hidrodinâmicos e de transporte através da solução de problemas inversos. A obtenção dos parâmetros de um modelo físico representa um dos principais problemas em sua calibração, e isso se deve em grande parte à dificuldade na medição em campo desses parâmetros. Em particular na modelagem de rios e estuários, a altura da rugosidade e o coeficiente de difusão turbulenta representam dois dos parâmetros com maior dificuldade de mediçã
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Sloterdijk, Hans [Verfasser], Werner [Akademischer Betreuer] Ekau, Ulrich [Gutachter] Saint-Paul, and Werner [Gutachter] Ekau. "Environmental and Physical Factors Affecting the Diversity and Distribution of the Ichthyoplankton in an "Inverse Estuary" , the Sine Saloum (Senegal) / Hans Sloterdijk ; Gutachter: Ulrich Saint-Paul, Werner Ekau ; Betreuer: Werner Ekau." Bremen : Staats- und Universitätsbibliothek Bremen, 2018. http://d-nb.info/1170321011/34.

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Harbison, John Edwin. "Groundwater chemistry and hydrological processes within a Quaternary coastal plain: Pimpama, Southeast Queensland." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16647/1/John%20Harbison%20Thesis.pdf.

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The Pimpama estuarine plain in subtropical southeast Queensland is comprised of Quaternary sediments infilling older bedrock. These multilayered unconsolidated sediments have various depositional origins, and are highly heterogeneous. The plain is low-lying and the surface drainage is controlled by flood mitigation measures including tidal gates and channelised streams. The control of surface drainage potentially affects the shallow water table. This modification of hydrology has implications for future viability of agriculture and also the environmental health of waterways. Increased landscap
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Harbison, John Edwin. "Groundwater chemistry and hydrological processes within a Quaternary coastal plain: Pimpama, Southeast Queensland." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16647/.

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The Pimpama estuarine plain in subtropical southeast Queensland is comprised of Quaternary sediments infilling older bedrock. These multilayered unconsolidated sediments have various depositional origins, and are highly heterogeneous. The plain is low-lying and the surface drainage is controlled by flood mitigation measures including tidal gates and channelised streams. The control of surface drainage potentially affects the shallow water table. This modification of hydrology has implications for future viability of agriculture and also the environmental health of waterways. Increased landscap
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Rodrigues, David Manuel Monteiro. "Movimentos e distribuição do pilrito-de-peito-preto Calidris alpina nas zonas intertidais no estuário do Tejo (Portugal)." Master's thesis, Universidade de Évora, 2012. http://hdl.handle.net/10174/15691.

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O pilrito-de-peito-preto Calidris alpina é uma das espécies de aves limícolas mais abundantes do estuário do Tejo (Portugal). Para determinar se existem diferenças na utilização das zonas intertidais consoante o refúgio utilizado, os movimentos de 12 pilritos-de-peito-preto, capturados em dois dos locais de refúgio mais importantes do estuário do Tejo, foram monitorizados durante os períodos de inverno e da migração. A quase totalidade das localizações foi obtida numa área até 5 km de distância em redor do refúgio utilizado, no entanto, as aves alimentaram-se a diferentes classes de distância
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Book chapters on the topic "Estuaire inverse"

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Vézina, Alain F. "Construction of flow networks using inverse methods." In Coastal and Estuarine Studies. American Geophysical Union, 1989. http://dx.doi.org/10.1029/ce032p0062.

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Kämpf, Jochen. "South Australia’s Large Inverse Estuaries: On the Road to Ruin." In Estuaries of the World. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7019-5_9.

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"inverse estuary." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_91602.

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"PHYSICAL PROCESSES IN INVERSE ESTUARINE SYSTEMS." In Oceanography And Marine Biology. CRC Press, 1997. http://dx.doi.org/10.1201/b12590-2.

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Staton, Joseph L., Brian A. Canada, Stephen A. Borgianini, and Karen M. Barkel. "Colonization of Coastal and Estuarine Environments." In Evolution and Biogeography. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190637842.003.0010.

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Coastal and estuarine environments are some of the best-known and most well-studied ecosystems in the world in that these regions lie in close proximity to much of the world’s human population. The crustaceans that inhabit these environments, both as adults and larvae, are adapted to the high productivity that characterizes such areas. We summarize their adaptations and behaviors and the physical characteristics of coastal zones and estuaries in shallower waters (&lt;200 m). In an attempt to objectively review worldwide diversity and endemism within the Crustacea from coastal and estuarine env
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Provost, C. "The Variational Inverse Method Revisited." In Three-Dimensional Models of Marine and Estuarine Dynamics. Elsevier, 1987. http://dx.doi.org/10.1016/s0422-9894(08)70471-9.

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Niquil, N., B. Saint-Béat, G. A. Johnson, et al. "Inverse Modeling in Modern Ecology and Application to Coastal Ecosystems." In Treatise on Estuarine and Coastal Science. Elsevier, 2011. http://dx.doi.org/10.1016/b978-0-12-374711-2.00906-2.

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Martel, F., and C. Provost. "The Branching of the Gulf Stream Revisited using the Variational Inverse Method." In Three-Dimensional Models of Marine and Estuarine Dynamics. Elsevier, 1987. http://dx.doi.org/10.1016/s0422-9894(08)70472-0.

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Bowers, D. G. "Models of Density Current Outflows form Inverse Estuaries: With Application to Spencer Gulf, South Australia." In Modeling Marine Systems. CRC Press, 2018. http://dx.doi.org/10.1201/9781351074704-1.

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Conference papers on the topic "Estuaire inverse"

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Chen, Jay Chung, and Lai Ah Wong. "Inverse Estimation of Estuary Flux." In Eighth International Conference on Estuarine and Coastal Modeling. American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40734(145)54.

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Shen, Jian, and Albert Y. Kuo. "Eutrophication Model Calibration as a Coupled Inverse Problem." In Seventh International Conference on Estuarine and Coastal Modeling. American Society of Civil Engineers, 2002. http://dx.doi.org/10.1061/40628(268)37.

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Tong, Chaofeng, Jinhai Zheng, Cheng Zhang, and Claude Guilbaud. "Salinity Response to the Runoff From Yangtze River Basin at Qingcaosha Reservoir Area in Yangtze Estuary." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20422.

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Qingcaosha Reservoir locates in the Yangtze Estuary of China is an estuary reservoir. As the third water source region of Shanghai city, about 717,000 m3/d raw water will be supplied from the Reservoir when the project is finished. In order to avoid salt water from saltwater intrusion, it is necessary to reveal the rule of salinity variation in the Qingcaosha Reservoir area. Saltwater intrusion in the Yangtze Estuary is mainly impacted by the fresh water discharge from the Yangtze River and the open sea tides. The salinity response of Qingcaosha Reservoir area to the runoff will be discussed.
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Al-Taliby, Wissam, Ashok Pandit, Antonio Berber, and Howell Heck. "The Use of Inverse Distance Weighted Interpolation to Calibrate the Vertical Hydraulic Conductivity below an Estuary." In World Environmental and Water Resources Congress 2017. American Society of Civil Engineers, 2017. http://dx.doi.org/10.1061/9780784480618.013.

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Sadrinasab, Masoud, and Karim Kenarkoohi. "A Three-Dimensional Numerical Modelling Study of the Sound Velocity Profiles in the Persian Gulf." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57062.

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The Persian Gulf connects to the Indian Ocean via the Strait of Hormuz. In this study, a three-dimensional hydrodynamic model (COHERENS) is employed in a fully prognostic mode to derive sound velocity profiles in the Persian Gulf, an evaporation-driven inverse estuary that is governed by import of surface water from the adjacent ocean and export of saline bottom gulf water through the Strait of Hormuz. During spring and summer, a cyclonic overturning circulation establishes along the full length of the Gulf. During autumn and winter, this circulation breaks up into mesoscale eddies, laterally
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Juarez, Braulio, and Arnoldo Valle-Levinson. "Bloqueo al intercambio de agua en un estuario generado por un pulso de agua salobre proveniente del océano." In I Congreso Internacional de Ciencias Exactas y Naturales. Universidad Nacional, 2019. http://dx.doi.org/10.15359/cicen.1.53.

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La formación de tapones de sal, i.e., bloqueo al intercambio de agua en estuarios, suele estar atribuida a estuarios de flujo reducido cuando su tasa de evaporación excede o es similar a la tasa de aporte de agua dulce. Datos mensuales y anuales en este estudio mostraron un tapón de sal formado por un pulso de agua dulce procedente de la plataforma oceánica hacia la entrada de una bahía somera, bahía de Barataria, localizada en el delta del rio Mississippi. Un mes de datos de corrientes mostró dos patrones predominantes: una circulación verticalmente homogénea y una circulación bidireccional.
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Nugraha, Reza Satria, and Oliver Esteva Tumbarinu. "Enhancing Stratigraphic Framework Consistency Using Spectral Gamma-Ray Data." In SPE Middle East Oil & Gas Show and Conference. SPE, 2021. http://dx.doi.org/10.2118/204836-ms.

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Abstract Stratigraphic correlation is crucial for reservoir characterization; therefore, it requires more advanced methods and techniques to reduce the stratigraphic correlation uncertainty, especially when variation in lateral facies is high. The studied formations from bottom to top consist of fluvial to marginal marine X Formation, shallow marine Y Formation, and fluvial distributary channels to estuarine Z Formation. Spectral gamma-ray logs give additional consistent information on lithological composition that can support identification of boundary between formations within the stratigrap
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