Relevant bibliographies by topics / Groundwater fluxes

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Groundwater fluxes'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Groundwater fluxes"

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Lam, A., D. Karssenberg, B. J. J. M. van den Hurk, and M. F. P. Bierkens. "Spatial and temporal connections in groundwater contribution to evaporation." Hydrology and Earth System Sciences Discussions 8, no. 1 (February 1, 2011): 1541–68. http://dx.doi.org/10.5194/hessd-8-1541-2011.

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Abstract. In climate models, lateral terrestrial water fluxes are usually neglected. We estimated the contribution of vertical and lateral groundwater fluxes to the land surface water budget at a subcontinental scale, by modelling convergence of groundwater and surfacewater fluxes. We present a hydrological model of the entire Danube Basin at 5 km resolution, and use it to show the importance of groundwater for the surface climate. The contribution of groundwater to evaporation is significant, and can be upwards of 30% in summer. We show that this contribution is local by presenting the groundwater travel times and the magnitude of groundwater convergence. Throughout the Danube Basin the lateral fluxes of groundwater are negligible when modelling at this scale and resolution. Also, it is shown that the contribution of groundwater to evaporation has important temporal characteristics. An experiment with the same model shows that a wet episode influences groundwaters contribution to summer evaporation for several years afterwards. This indicates that modelling groundwater flow has the potential to augment the multi-year memory of climate models.
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Zhang, Shuang, and Noah J. Planavsky. "Revisiting groundwater carbon fluxes to the ocean with implications for the carbon cycle." Geology 48, no. 1 (November 13, 2019): 67–71. http://dx.doi.org/10.1130/g46408.1.

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Abstract Compared with riverine systems, the influence of groundwater on the global carbon cycle has remained underexplored. Here, we provide a new estimate of the bicarbonate fluxes from fresh groundwater to the ocean by coupling a statistical and hydrological analysis of groundwater and river samples across the contiguous United States with a study of global groundwater characteristics. We find that the mean concentration ([]) in groundwaters exceeds that in surface rivers by a factor of 2–3 throughout the contiguous United States. Based on estimates of fresh groundwater discharge to the ocean and scaling up our estimated mean [] in groundwaters from the United States and around the world, we arrived at a mean global flux from groundwaters ranging from 7.4 × 1012 (25th percentile)–1.8 × 1013 mol/yr (75th percentile) to 2.8 × 1013–8.3 × 1013 mol/yr, which is 22%–237% of the global flux from river systems, respectively. We also estimated that the global carbon flux derived from subsurface silicate weathering could be comparable to 32%–351% that from surficial silicate weathering, depending on groundwater discharge rates. Despite large uncertainties due to data limitation, this study highlights that groundwater weathering could be an important carbon sink in both the short- and long-term carbon cycle. Therefore, additional work on groundwaters is needed to develop a well-constrained view of the global carbon cycle.
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Lam, A., D. Karssenberg, B. J. J. M. van den Hurk, and M. F. P. Bierkens. "Spatial and temporal connections in groundwater contribution to evaporation." Hydrology and Earth System Sciences 15, no. 8 (August 24, 2011): 2621–30. http://dx.doi.org/10.5194/hess-15-2621-2011.

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Abstract. In climate models, lateral terrestrial water fluxes are usually neglected. We estimated the contribution of vertical and lateral groundwater fluxes to the land surface water budget at a subcontinental scale, by modeling convergence of groundwater and surfacewater fluxes. We present a hydrological model of the entire Danube Basin at 5 km resolution, and use it to show the importance of groundwater for the surface climate. Results show that the contribution of groundwater to evaporation is significant, and can locally be higher than 30 % in summer. We demonstrate through the same model that this contribution also has important temporal characteristics. A wet episode can influence groundwater contribution to summer evaporation for several years afterwards. This indicates that modeling groundwater flow has the potential to augment the multi-year memory of climate models. We also show that the groundwater contribution to evaporation is local by presenting the groundwater travel times and the magnitude of groundwater convergence. Throughout the Danube Basin the lateral fluxes of groundwater are negligible when modeling at this scale and resolution. This suggests that groundwater can be adequately added in land surface models by including a lower closed groundwater reservoir of sufficient size with two-way interaction with surface water and the overlying soil layers.
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Anibas, C., B. Verbeiren, K. Buis, J. Chormański, L. De Doncker, T. Okruszko, P. Meire, and O. Batelaan. "A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland." Hydrology and Earth System Sciences 16, no. 7 (July 27, 2012): 2329–46. http://dx.doi.org/10.5194/hess-16-2329-2012.

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Abstract. As recognized in the European Water Framework Directive, groundwater-dependent wetlands and their diverse ecosystems have important functions which need to be protected. The vegetation in such habitats is often dependent on quality, quantity and patterns of river discharge and groundwater-surface water interaction on a local or reach scale. Since groundwater-surface water exchange studies on natural rivers and wetlands with organic soils are scarce, more functional analysis is needed. To this end we combined different field methods including piezometer nests, temperature as tracer and seepage meter measurements. Some of these measurements were used as inputs and/or as validation for the numerical 1-D heat transport model STRIVE. In transient mode the model was used to calculate spatially distributed vertical exchange fluxes from temperature profiles measured at the upper Biebrza River in Poland over a period of nine months. Time series of estimated fluxes and hydraulic head gradients in the hyporheic zone were used to estimate the temporal variability of groundwater-surface water exchange. This paper presents a hierarchical approach for quantifying and interpreting groundwater-surface water interaction in space and time. The results for the upper Biebrza show predominantly upward water fluxes, sections of recharge, however, exist along the reach. The fluxes depend more on hydraulic gradients than on riverbed conductivity. This indicates that the fluvio-plain scale is required for interpreting the exchange fluxes, which are estimated on a local scale. The paper shows that a conceptual framework is necessary for understanding the groundwater-surface water interaction processes, where the exchange fluxes are influenced by local factors like the composition of the riverbed and the position of the measurement on a local scale, and by regional factors like the hydrogeology and topography on a fluvio-plain scale. The hierarchical methodology increases the confidence in the estimated exchange fluxes and improves the process understanding. The accuracy of the measurements and related uncertainties, however, remain challenges for wetland environments. Gaining quantitative information on groundwater-surface water interaction can improve modeling confidence and as a consequence helps to develop effective procedures for management and conservation of valuable groundwater dependent wetlands.
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Kennedy, Casey D., and David P. Genereux. "14C Groundwater Age and the Importance of Chemical Fluxes Across Aquifer Boundaries in Confined Cretaceous Aquifers of North Carolina, USA." Radiocarbon 49, no. 3 (2007): 1181–203. http://dx.doi.org/10.1017/s0033822200043101.

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Radiocarbon activity, He concentrations, and other geochemical parameters were measured in groundwater from the confined Black Creek (BC) and Upper Cape Fear (UCF) aquifers in the Coastal Plain of North Carolina.14C ages adjusted for geochemical and diffusion effects ranged from 400 to 21,900 BP in the BC, and 13,400 to 26,000 BP in the underlying UCF; ages increased coastward in both aquifers. Long-term average linear groundwater velocity is about 2.5 m/yr for the BC, and somewhat larger for the UCF. Aquifer-aquitard exchange is an important influence on the DIC concentration,14C activity, and estimated age of aquifer groundwater. Accounting for this exchange in14C age calculations places the groundwater samples with the lowest estimated recharge temperatures nearest in time to the last glacial maximum. Traditional geochemical correction models that do not account for aquifer-aquitard exchange significantly overestimate groundwater age. He concentration in groundwater varies with both age and stratigraphic position. Dissolved He data provide strong evidence of upward vertical He transport through the study aquifers; data from the UCF are broadly consistent with the pattern expected for a confined aquifer receiving a concentrated, localized He flux from below (based on a previously published model for this situation), in this case most likely from crystalline bedrock. He has potential as an indicator of groundwater age in the study aquifers, if interpreted within an appropriate analytical framework that includes the observed strong vertical transport. δ18O in the oldest groundwater is enriched (relative to modern groundwater) by 1 to 1.2‰, the opposite of the δ18O depletion found in many old groundwaters but consistent with the enrichment found in groundwater in this age range in Georgia and Florida.
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Anibas, C., B. Verbeiren, K. Buis, J. Chormański, L. De Doncker, T. Okruszko, P. Meire, and O. Batelaan. "A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland." Hydrology and Earth System Sciences Discussions 8, no. 5 (October 27, 2011): 9537–85. http://dx.doi.org/10.5194/hessd-8-9537-2011.

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Abstract. Groundwater-surface water exchange studies on natural rivers and wetlands dominated by organic soils are scarce. We present a hierarchical approach to quantitatively investigate and interpret groundwater-surface water interaction in space and time by applying a combination of different field methods including piezometer nests, temperature and seepage measurements. The numerical 1-D heat transport model of STRIVE is used in transient mode to calculate vertical fluxes from thermal profiles measured along the upper Biebrza River, Poland over a period of nine months. The calculated fluxes show no clear spatial pattern of exchange fluxes unless an interpolation of the point estimates on a reach scale is performed. Significance of differences in net exchange rates versus morphological features are investigated with statistical tests. Time series of temperature and hydraulic head of the hyporheic zone are used to estimate the temporal variability of the groundwater-surface water exchange. Seepage meter measurements and slug tests were used for cross validation of modelled fluxes. Results show a strong heterogeneity of the thermal and physical soil properties along the reach, leading to a classification of these parameters for modelling purposes. The groundwater-surface water exchange shows predominantly upward water fluxes, however alternating sections of recharge exist. The exchange fluxes are significantly different dependent on the position of the river in the valley floor and the river morphology where fluxes are more dependent on hydraulic gradients than on river bed conductivity. Sections of higher fluxes are linked to the vicinity of the morainic plateau surrounding the rivers alluvium and to meanders, indicating that a perspective on the fluvio-plain scale is required for interpreting the estimated exchange fluxes. Since the vertical component of the exchange fluxes cannot explain the magnitude of the change in river discharge, a lateral flow component across the alluvial plain has to be responsible. The hierarchical methodology increases the confidence in the estimated exchange fluxes and improves the process understanding, however the accuracy of the measurements and related uncertainties remain challenges for wetland environments.
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Schmidt, C., M. Bayer-Raich, and M. Schirmer. "Characterization of spatial heterogeneity of groundwater-stream water interactions using multiple depth streambed temperature measurements at the reach scale." Hydrology and Earth System Sciences 10, no. 6 (November 16, 2006): 849–59. http://dx.doi.org/10.5194/hess-10-849-2006.

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Abstract. Streambed temperatures can be easily, accurately and inexpensively measured at many locations. To characterize patterns of groundwater-stream water interaction with a high spatial resolution, we measured 140 vertical streambed temperature profiles along a 220 m section of a small man-made stream. Groundwater temperature at a sufficient depth remains nearly constant while stream water temperatures vary seasonally and diurnally. In summer, streambed temperatures of groundwater discharge zones are relatively colder than downwelling zones of stream water. Assuming vertical flow in the streambed, the observed temperatures are correlated to the magnitude of water fluxes. The water fluxes are then estimated by applying a simple analytical solution of the heat conduction-advection equation to the observed vertical temperature profiles. The calculated water fluxes through the streambed ranged between 455 Lm−2 d−1 of groundwater discharging to the stream and approximately 10 Lm−2 d−1 of stream water entering the streambed. The investigated reach was dominated by groundwater discharge with two distinct high discharge locations accounting for 50% of the total flux on 20% of the reach length.
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Schmidt, C., M. Bayer-Raich, and M. Schirmer. "Characterization of spatial heterogeneity of groundwater-stream water interactions using multiple depth streambed temperature measurements at the reach scale." Hydrology and Earth System Sciences Discussions 3, no. 4 (July 10, 2006): 1419–46. http://dx.doi.org/10.5194/hessd-3-1419-2006.

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Abstract. Streambed temperatures can be easily, accurately and inexpensively measured at many locations. We obtained 140 vertical streambed temperature profiles along a 220 m section of a small artificial stream to characterize patterns of groundwater-stream water interaction with a high spatial resolution. Groundwater temperature at a sufficient depth remains nearly constant while stream water temperatures vary seasonally and diurnally. In summer, streambed temperatures of groundwater discharge zones are relatively colder than downwelling zones of stream water. Assuming vertical flow in the streambed, the observed temperatures can be correlated to the magnitude of water fluxes. The water fluxes can then be estimated by applying a simple analytical solution of the heat diffusion-advection equation to the observed vertical temperature profiles. The calculated water fluxes through the streambed ranged between 10.0 Lm−2 d−1 of stream water entering the streambed and 455.0 Lm−2 d−1 of groundwater discharging to the stream. The investigated reach was dominated by groundwater discharge with two distinct high discharge locations accounting for 50% of the total flux on 20% of the reach length.
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Zessner, M., Ch Schilling, O. Gabriel, and U. Heinecke. "Nitrogen fluxes on catchment scale: the influence of hydrological aspects." Water Science and Technology 52, no. 9 (November 1, 2005): 163–73. http://dx.doi.org/10.2166/wst.2005.0310.

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In two catchment areas with altogether eight subcatchments characterising different site-specific situations the interaction between anthropogenic activities (e.g. agriculture, nutrition and waste water management), nitrogen emissions and in stream loads as well as concentrations were studied in detail. Groundwater is the most important pathway for nitrogen inputs into surface waters. Denitrification in the soil/subsurface/groundwater system controls the amount of this input to a high extent. Key factors influencing this process are organic carbon availability, geology, precipitation and groundwater recharge rates as well as residence time in groundwater. The MONERIS emission model is a useful tool to quantify these relationships on (sub-)catchment scale. Areas where concentrations in groundwater (e.g. nitrate) tend to be higher due to little dilution with water and might be problematic in respect to limit values for drinking water, are much less relevant in respect to the loads transported to river systems and receiving seas, than regions with high precipitation. In cases with high water availability mainly high loads transported downstream and finally to the receiving sea are a considerable problem. Within a region mainly areas close to river systems contribute to nitrogen discharges to the river system because of the short residence times of the groundwater from these areas and - related to this - a lower influence of denitrification in the groundwater.
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Kalbus, E., C. Schmidt, J. W. Molson, F. Reinstorf, and M. Schirmer. "Influence of aquifer and streambed heterogeneity on the distribution of groundwater discharge." Hydrology and Earth System Sciences 13, no. 1 (February 2, 2009): 69–77. http://dx.doi.org/10.5194/hess-13-69-2009.

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Abstract. The spatial distribution of groundwater fluxes through a streambed can be highly variable, most often resulting from a heterogeneous distribution of aquifer and streambed permeabilities along the flow pathways. Using a groundwater flow and heat transport model, we defined four scenarios of aquifer and streambed permeability distributions to simulate and assess the impact of subsurface heterogeneity on the distribution of groundwater fluxes through the streambed: (a) a homogeneous low-K streambed within a heterogeneous aquifer; (b) a heterogeneous streambed within a homogeneous aquifer; (c) a well connected heterogeneous low-K streambed within a heterogeneous aquifer; and (d) a poorly connected heterogeneous low-K streambed within a heterogeneous aquifer. The simulation results were compared with a base case scenario, in which the streambed had the same properties as the aquifer, and with observed data. The results indicated that the aquifer has a stronger influence on the distribution of groundwater fluxes through the streambed than the streambed itself. However, a homogeneous low-K streambed, a case often implemented in regional-scale groundwater flow models, resulted in a strong homogenization of fluxes, which may have important implications for the estimation of peak mass flows. The flux distributions simulated with heterogeneous low-K streambeds were similar to the flux distributions of the base case scenario, despite the lower permeability. The representation of heterogeneous distributions of aquifer and streambed properties in the model has been proven to be beneficial for the accuracy of flow simulations.
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Dissertations / Theses on the topic "Groundwater fluxes"

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Hays, Rebecca Lynn. "Groundwater discharge and associated nutrient fluxes to the Delaware Bay at Cape Henlopen, Delaware." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.47 Mb., 264 p, 2006. http://wwwlib.umi.com/dissertations/fullcit/1430777.

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Thomas, David A. "Characterization of water fluxes at a trench and gate groundwater remediation site." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0018/MQ48049.pdf.

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Martin, Caroline Elizabeth Anne. "Sources of solutes, groundwater fluxes and weathering processes in an active mountain belt, Taiwan." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648850.

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Carpenter, Kathryn Elizabeth. "Nutrient, fluvial and groundwater fluxes between a North Norfolk, U.K. saltmarsh and the North Sea." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357211.

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Tripathi, Ganesh N. "SPATIO-TEMPORAL VARIABILITY IN GROUNDWATER DISCHARGE AND CONTAMINANT FLUXES ALONG A CHANNELIZED STREAM IN WESTERN KENTUCKY." UKnowledge, 2013. http://uknowledge.uky.edu/ees_etds/13.

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Spatio-temporal variability in groundwater discharge and contaminant fluxes along a channelized stream in western Kentucky Surface and groundwater discharges and contaminant fluxes can vary with time and space depending upon the hydrogeological processes and geological setting of the area of interest. This study examined a ~300-m-long, channelized reach of a first-order perennial stream, Little Bayou Creek, in the Coastal Plain of far western Kentucky during the period October 2010–February 2012. Along the study reach, springs discharge groundwater contaminated by the chlorinated organic compound trichloroethene (TCE) and radionuclide technetium-99 (99Tc) released as a result of past activities at the U.S. Department of Energy’s Paducah Gaseous Diffusion Plant. The study addressed variability in groundwater discharge patterns and contaminant concentrations at various timescales (seasonal, annual, and decadal) and the extent to which the discharge sites are spatially persistent. Understanding patterns of groundwater discharge along a stream can be important for assessing the fate and transport of aqueous contaminants. Groundwater discharge was estimated during baseflow conditions using different mass-balance approaches, including velocity-area and dye-dilution gauging. Discharge fluctuated seasonally but typically increased downstream, indicating the entire study reach to be gaining throughout the year. Discharge rates of individual springs also fluctuated seasonally. Tracer test data were utilized to model flow and transient storage along the reach using the USGS software OTIS-P. Cross-sectional area determined from OTIS-P was similar to that measured by velocity-area gauging. Reach area-normalized discharge fluxes were comparable to values determined by Darcy’s law calculations from a pair of monitoring wells at the downstream end of the study reach. Temperature data acquired from probing along grids in winter and summer, from fiber-optic sensing along the reach in autumn, and from data-loggers and manual measurements in springs were used to delineate focused discharge locations. Comparison of temperature-probing results with prior studies indicated that locations of some springs persisted over a decade, whereas other springs emerged and disappeared. Because the stream is located in unlithified sediments, discharge rates of springs appear to fluctuate with soil piping and collapse along joints in fractured clay. Contaminant concentrations in springs decreased downstream along the reach and were lower than observed during September 1999 – May 2001. The continued occurrence of dissolved oxygen and the absence of TCE daughter products in springs suggest that the decrease in TCE concentrations resulted from the installation of upgradient extraction wells, rather than from intrinsic reductive degradation. KEYWORDS: Contaminant fluxes, trichloroethene, technetium-99, baseflow, temperature probing.
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Mancera, Gonzalez Rafael. "Uncertainty in Simulated Fluxes and Physical Conditions of Two North European Wetlands." Thesis, KTH, Mark- och vattenteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96293.

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There is an extended concern for how to quantify the fluxes of greenhouse gasses (GHG) and how they are related to climate change and land use. Efforts have already been done, mostly regarding carbon (C) compounds, but there is still much to be done especially to understand regulating factors and interactions with the Nitrogen cycle. NitroEurope is a large project for the integrated European research into the N cycle. This study shares its aim, to improve the understanding the physics involved in the fluxes of the reactive N (Nr). More specifically, the patterns of some physical and biological processes related to Nr have been studied for two wetlands, one in the proximity of Edinburgh and the other in the North of Finland.   A common model setup has been used for both of them, since they are both peat soils. The differences applied to achieve appropriate performances give insights of their nature. The presence of snow is a major factor that governs the behavior of the site in Finland. The scaling of existing models for the estimation of heat transfer in the soil of the Scottish site is also critical, such as its groundwater level. The sites represent different climatic conditions, but for CO2 fluxes they showed similar behavior and response to governing meteorological conditions. Using the GLUE method in combination with a process oriented ecosystem model, some further insights have been gained for the regulation and control of greenhouse gas emissions from the two sites.
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Lauwo, Simon Yesse. "A modeling investigation of ground and surface water fluxes for Konza Tallgrass Prairie." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/470.

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Simon, Nataline. "Développement des méthodes actives de mesures distribuées de température par fibre optique pour la quantification des écoulements souterrains : apports et limites pour la caractérisation des échanges nappe/rivière." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1B028.

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Les échanges entre les rivières et les nappes d’eau souterraine jouent un rôle essentiel dans le maintien des écosystèmes aquatiques. Or, leur caractérisation demeure difficile du fait de leur forte variabilité dans l’espace et dans le temps. Dans ce contexte, l’objectif de ce travail de thèse est de développer des méthodes actives de mesures distribuées de température pour quantifier la dynamique des interactions nappe/rivière. Après avoir établi une nouvelle approche pour évaluer la résolution spatiale des mesures de température, nous avons validé deux nouvelles méthodes d’interprétation permettant d’estimer de manière distribuée les flux d’eau et la conductivité thermique du milieu poreux. Les travaux, associant modélisations numériques et mesures expérimentales en laboratoire, montrent que les méthodes d’interprétation développées permettent d’estimer avec une excellente précision les écoulements et que la gamme de flux pouvant être investiguée est particulièrement large. Pour tester cette approche prometteuse, des expériences actives ont ensuite été réalisées sur le terrain dans deux environnements différents : d’abord dans un petit cours d’eau d’ordre 1 de tête de bassin versant, puis dans un fleuve s’écoulant le long d’une plaine alluviale. Ces applications ont démontré le fort potentiel des méthodes actives pour quantifier les écoulements à l’interface nappe/rivière et décrire leur variabilité spatiale et temporelle. La comparaison des résultats obtenus sur les deux sites a permis finalement de discuter la faisabilité, les apports mais aussi les limites de la méthode dans différents contextes hydrologiques
Groundwater/surface water interactions play a fundamental role in the functioning of aquatic ecosystems. However, their quantification is challenging because exchange processes vary both in time and space. Here, we propose an active distributed heat transport experiment in order to quantify the spatial and temporal variability of groundwater/surface water interactions. As a first step, we proposed a new approach to evaluate the spatial resolution of temperature measurements. Then, two interpretation methods of active-DTS experiments were developed and fully validated to estimate the distribution of porous media thermal conductivity and the groundwater fluxes in sediments. Based on numerical simulations and sandbox experiments, results demonstrated the potentiality of these methods for quantifying distributed groundwater fluxes with high accuracy. The large range of groundwater fluxes that can be investigated with the method makes specially promising the application of active experiments for many subsurface applications. Secondly, we conducted heat transport experiments within the streambed sediments of two different streams: in a first-order stream, then in a large flow-system located along an alluvial plain. These applications demonstrated the relevance of using active experiments to characterize the spatial complexity of stream exchanges. Finally, the comparison of results obtained for each experimental site allowed discussing the capabilities and limitations of using active-DTS field experiments to characterize groundwater/surface water interactions in different hydrological contexts
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Blackstock, Joshua Michael. "Isotope study of moisture sources, recharge areas, and groundwater flow paths within the Christchurch Groundwater System." Thesis, University of Canterbury. Geological Sciences, 2011. http://hdl.handle.net/10092/7042.

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Determining sustainable water resource utilization rates is an important problem faced by regulatory agencies all around the world. One of the key parameters in determining accurate water budgeting schemes is the rate of water resource replenishment, or ‘recharge’ in groundwater systems. Fundamental questions regarding groundwater recharge include: What is the source of recharge? What is the spatial distribution of recharge? What is the annual average recharge rate, from potentially disparate sources in disparate areas? Answers to these questions can be gained through combining physical and chemical hydrogeological research tools, including stable isotopic compositions. Land-use intensification, including significant increases in dairying, has placed a priority on developing water resource management practices throughout New Zealand. Here we present the first compilation of delta oxygen-18 and delta hydrogen-2 values from individual precipitation events, local surface waters, depression springs, and groundwaters from the greater-Christchurch area. A variety of analytical methods were used in an effort to evaluate the potential use of stable isotopic compositions as tracers of surface-groundwater interaction in the local hydrologic cycle. The results of this thesis found the isotopic variability of Christchurch precipitation to be highly varied. Back-trajectory analysis of single precipitation events exhibit pathways arriving from three principal sources: the Southern Pacific Ocean, the Tasman Sea, and the Tropical Pacific Ocean. Separately, delta oxygen-18 and delta hydrogen-2 values values from these sources show three distinct local meteoric water lines, which are determined to be largely affected by the environmental conditions present in these areas at the time water vapour formation. Intra-storm variation of extra-tropical cyclones support these findings as significant changes in deuterium excess as moisture sources change with southward movement of the low pressure system. Three line-conditioned tests were subsequently developed to compare the relationship between monthly surface rainfall, surface water, and groundwater samples to the respective moisture origins. Surface rainfall, rainfall infiltration, surface waters, and groundwaters all exhibit the least amount of deviation from the Southern Pacific Ocean local meteoric water line. These observations suggest the principle moisture source to Christchurch to be from west-south westerly flow from the mid-latitudes. However, these similarities do not make partitioning their relative contributions to the groundwater system easy. Previous physical and isotopic investigations have shown the dominant sources of recharge to the Christchurch Groundwater System (CGS) are alpine rivers and local precipitation of which there is statistically significant difference with respect to delta oxygen-18 values. A binary single-isotope mixing model allows for quantification of the relative contributions of alpine river and precipitation derived inputs to local depression springs. The isotopic model indicates that approximately 80% of spring discharge was derived from alpine rivers, in good agreement with recently published physical mass balance model results. Deep groundwater flow paths however show groundwater to flow from the Central Canterbury Plains to the CGS. Potentially including losses from the upper Waimakariri River reaches. If included, this places a net recharge amount to the CGS water budget, which if using losses from only the lower Waimakariri River, there is a net loss. Losses from the upper reaches and subsequent groundwater flow into the CGS are likely as there have been no observed declines in groundwater levels even though there is currently a net loss by only using recharge components within the CGS. Ultimately, recharge from groundwater movement from the Central Canterbury Plains may play significant role; however, a much more sophisticated geochemical model is needed to test these theories and determine contributions. This research demonstrates the utility of stable isotopes as tracers of hydrogeological processes, particularly in shallow groundwater, and their potential contributions to the water resource allocation decision making process.
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Luek, Jenna Lynn. "Submarine Groundwater Discharge to the York River Estuary: Quantifying Groundwater Flux and Potential for Biogeochemical Cycling." W&M ScholarWorks, 2013. https://scholarworks.wm.edu/etd/1539617937.

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Books on the topic "Groundwater fluxes"

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Groundwater fluxes across interfaces. Washington, D.C: National Academies Press, 2004.

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P, Hoffmann John. Simulated water-level responses, ground-water fluxes, and storage changes for recharge scenarios along Rillito Creek, Tucson, Arizona. Reston, Va: U.S. Geological Survey, 2005.

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Carpenter, Karen Elizabeth. Nutrient, fluvial and groundwater fluxes between a North Norfolk, U.K. saltmarsh and the North Sea. Norwich: University of East Anglia, 1993.

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Stannard, David I. Measurements of evapotranspiration, surface-energy fluxes, weather variables, and water-table depths in the closed basin of the San Luis Valley, Alamosa County, Colorado, 1985-88. Denver, Colo: Dept. of the Interior, U.S. Geological Survey, 1995.

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5

Dynamics of fluids in porous media. New York: Dover, 1988.

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Global water dynamics: Shallow and deep groundwater, petroleum hydrology, hydrothermal fluids, and landscaping. New York: Marcel Dekker, Inc, 2004.

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Corey, A. T. Mechanics of immiscible fluids in porous media. 3rd ed. Highlands Ranch, Colo: Water Resources Publications, 1994.

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Corey, A. T. Mechanics of immiscible fluids in porous media. 2nd ed. Littleton, Colo., U.S.A: Water Resources Publications, 1986.

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J, Tarney, ed. The behaviour and influence of fluids in subduction zones: Proceedings of a Royal Society Discussion Meeting, held on 8 and 9 November 1990. London: The Society, 1991.

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Stopa, Jerzy. Przepływy dwufazowe w pokładach węgla i warstwach wodonośnych: Wybrane zagadnienia. Kraków: Wydawnictwa AGH, 1996.

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Book chapters on the topic "Groundwater fluxes"

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Uma, Kalu O., and K. M. Onuoha. "Groundwater Fluxes and Gully Development in S. E. Nigeria." In Groundwater and Mineral Resources of Nigeria, 39–59. Wiesbaden: Vieweg+Teubner Verlag, 1988. http://dx.doi.org/10.1007/978-3-322-87857-1_5.

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Kim, Guebuem, and P. W. Swarzenski. "Submarine Groundwater Discharge (SGD) and Associated Nutrient Fluxes to the Coastal Ocean." In Global Change – The IGBP Series, 529–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92735-8_11.

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Sethi, Rajandrea, and Antonio Di Molfetta. "Transport of Immiscible Fluids." In Groundwater Engineering, 249–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20516-4_14.

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Wang, Chi-Yuen, and Michael Manga. "Response to Tides, Barometric Pressure and Seismic Waves." In Lecture Notes in Earth System Sciences, 83–153. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64308-9_5.

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AbstractGroundwater responses to Earth tides and barometric pressure have long been reported and increasingly used in hydrogeology to advance our understanding of groundwater systems. The response of groundwater to seismic waves has also been used in recent years to study the interaction between earthquakes and fluids in the crust. These methods have gained popularity for monitoring groundwater systems because they are both effective and economical. This chapter reviews the response of groundwater system to Earth tides, barometric pressure, and seismic waves as a continuum of poroelastic responses to oscillatory forcing across a broad range of frequency.
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Sawada, Atsushi, Hiromitsu Saegusa, and Yuji Ijiri. "Uncertainty in Groundwater Flow Simulations Caused by Multiple Modeling Approaches, at the Mizunami Underground Research Laboratory, Japan." In Dynamics of Fluids and Transport in Fractured Rock, 91–101. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/162gm10.

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Charlier, Jean-Baptiste, Aurélien Vallet, Didier Tourenne, and Guillaume Hévin. "Dynamics and Fluxes of Nutrients in Surface and Groundwaters in a Cultivated Karstic Basin in the Jura Mountains." In Advances in Karst Science, 83–90. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14015-1_10.

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Böttcher, J., and O. Strebel. "Quantification of Deterministic and Stochastic Variability Components of Solute Concentrations at the Groundwater Table in Sandy Soils." In Field-Scale Water and Solute Flux in Soils, 129–40. Basel: Birkhäuser Basel, 1990. http://dx.doi.org/10.1007/978-3-0348-9264-3_15.

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Kane, T. C., D. C. Culver, and J. Mathieu. "Biotic Fluxes and Gene Flow." In Groundwater Ecology, 245–70. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-08-050762-0.50016-4.

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Destouni, G., and E. Simic. "Stochastic analysis of contaminant fluxes in groundwater." In Groundwater 2000, 475–76. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078593-235.

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Bockelmann, A., T. Ptak, and G. Teutsch. "Field scale quantification of contaminant mass fluxes and natural attenuation rates using an integral investigation approach." In Groundwater 2000, 309–10. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078593-152.

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Conference papers on the topic "Groundwater fluxes"

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Harmon, Ryan, K. Singha, Holly R. Barnard, Jackie Randall, and Daphne J. Szutu. "CONNECTING EVAPOTRANSPIRATION AND GROUNDWATER FLUXES IN THE CRITICAL ZONE." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-285828.

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Cascarano, Ryan N., Donald M. Reeves, and Mark Henry. "CHARACTERIZING FLUXES AT THE GROUNDWATER-SURFACE WATER INTERFACE USING DYE TRACERS." In 52nd Annual North-Central GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018nc-311848.

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Curran, Katherine L., and Jacque L. Kelly. "COMPARISON OF SUBMARINE GROUNDWATER DISCHARGE FLUXES IN GEORGIA TIDAL CREEKS USING RADON." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337313.

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Jorge Luiz Rabelo and Edson Cesar Wendland. "Assessment of groundwater recharge and water fluxes of the Guarani Aquifer System, Brazil." In 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29434.

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Redder, Brian W., Elizabeth W. Boyer, Tony Buda, Casey D. Kennedy, David R. DeWalle, and Gordon Folmar. "GROUNDWATER-SURFACE WATER INTERACTIONS AFFECTING WATER AND NITROGEN FLUXES IN AN AGRICULTURAL WATERSHED." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-323465.

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Gordon-Smith, Debbie-Ann D. S., Richard N. Peterson, Leigha E. Peterson, Stivaly Paulino, and Henry Bokuniewicz. "SUBMARINE GROUNDWATER DISCHARGE AND ASSOCIATED NUTRIENT FLUXES TO THE NORTH COAST OF JAMAICA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306791.

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McKenzie, Trista, and Henrietta Dulai. "SEASONALITY OF GROUNDWATER INPUTS AND ASSOCIATED ANTHROPOGENIC FLUXES IN THE KAHALUʻU STREAM COMPLEX, OʻAHU." In 113th Annual GSA Cordilleran Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017cd-292526.

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Cascarano, Ryan N., Donald M. Reeves, and Mark Henry. "USE OF FLUORESCEIN DYE FOR CHARACTERIZING HYDROLOGIC FLUXES AT THE GROUNDWATER - SURFACE WATER INTERFACE." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-303145.

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Cho, Hyung-Mi, and Guebuem Kim. "Nutrient Fluxes from Land to Ocean: The Importance of Groundwater Discharge and Continental Shelf Waters." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.423.

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Michael, Holly A., James W. Heiss, Kyra H. Kim, William Ullman, Christopher J. Russoniello, Carlos Duque, and Thomas W. Brooks. "THE INFLUENCE OF GROUNDWATER FLOWPATHS AND MIXING ON NUTRIENT FLUXES TO ESTUARIES AND THE OCEAN." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-282757.

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Reports on the topic "Groundwater fluxes"

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Genereux, David, Christopher Osburn, Steven Oberbauer, Diana Oviedo Vargas, and Diego Dierick. Water-carbon Links in a Tropical Forest: How Interbasin Groundwater Flow Affects Carbon Fluxes and Ecosystem Carbon Budgets. Office of Scientific and Technical Information (OSTI), March 2017. http://dx.doi.org/10.2172/1348200.

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Hatfield, Kirk, Michael D. Annable, and P. S. Rao. Field Demonstration and Validation of a New Device for Measuring Groundwater and Perchlorate Fluxes at IHDIV-NSWC, Indian Head, MD. Fort Belvoir, VA: Defense Technical Information Center, July 2006. http://dx.doi.org/10.21236/ada468561.

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Scholz, Florian. Sedimentary fluxes of trace metals, radioisotopes and greenhouse gases in the southwestern Baltic Sea Cruise No. AL543, 23.08.2020 – 28.08.2020, Kiel – Kiel - SEDITRACE. GEOMAR Helmholtz Centre for Ocean Research Kiel, November 2020. http://dx.doi.org/10.3289/cr_al543.

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R/V Alkor Cruise AL543 was planned as a six-day cruise with a program of water column and sediment sampling in Kiel Bight and the western Baltic Sea. Due to restrictions related to the Covid-19 pandemic, the original plan had to be changed and the cruise was realized as six oneday cruises with sampling in Kiel Bight exclusively. The first day was dedicated to water column and sediment sampling for radionuclide analyses at Boknis Eck and Mittelgrund in Eckernförde Bay. On the remaining five days, water column, bottom water, sediment and pore water samples were collected at eleven stations covering different types of seafloor environment (grain size, redox conditions) in western Kiel Bight. The data and samples obtained on cruise AL543 will be used to investigate (i) the sedimentary cycling of bio-essential metals (e.g., nickel, zinc, and their isotopes) as a function of variable redox conditions, (ii) the impact of submarine groundwater discharge and diffusive benthic fluxes on the distribution of radium and radon as well as greenhouse gases (methane and nitrous oxide) in the water column, and (iii) to characterize and quantify the impact of coastal erosion on sedimentary iron, phosphorus and rare earth element cycling in Kiel Bight.
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Truex, Michael J., Vincent R. Vermeul, Brad G. Fritz, Rob D. Mackley, Jacob A. Horner, Christian D. Johnson, and Darrell R. Newcomer. Investigation of Hexavalent Chromium Flux to Groundwater at the 100-C-7:1 Excavation Site. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1063737.

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Genereux, David, James Saiers, and Carl Bolster. Using Flux Information at Surface Water Boundaries to Improve a Groundwater Flow and Transport Model. Fort Belvoir, VA: Defense Technical Information Center, November 2000. http://dx.doi.org/10.21236/ada391295.

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Truex, Michael J., and Vincent R. Vermeul. Sampling Instruction: Investigation of Hexavalent Chromium Flux to Groundwater at the 100-C-7:1 Excavation Site. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1043125.

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Truex, Michael J., Martinus Oostrom, George V. Last, Christopher E. Strickland, and Guzel D. Tartakovsky. Evaluating Contaminant Flux from the Vadose Zone to the Groundwater in the Hanford Central Plateau. SX Tank Farms Case Study. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1224517.

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