Modeling Flow and Nitrate Fate at Catchment Scale in Brittany (France)

Conan, Céline; Bouraoui, F.; Turpin, Nadine; Marsily, Ghislain de; Bidoglio, G.

doi:10.2134/jeq2003.2026

Cited by 103 publications

(43 citation statements)

References 14 publications

(18 reference statements)

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“…Additional SWATMOD testing and scenario results are reported by Perkins and Sophocleous (1999) for the Lower Republican River. SWAT was coupled with MODFLOW to study for the 12 km 2 Coët-Dan Watershed in Brittany, France (Conan et al, 2003a). Accurate results were reported, with respective monthly NSE values for streamflow and nitrate of 0.88 and 0.87.…”

Section: Swat-modflow And/or Surface Water Model Interfacesmentioning

confidence: 98%

The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions

Gassman

Reyes²,

Green³

et al. 2007

Transactions of the ASABE

2,388

1,574

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Section: Swat-modflow And/or Surface Water Model Interfacesmentioning

confidence: 98%

The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions

Gassman

Reyes²,

Green³

et al. 2007

Transactions of the ASABE

2,388

1,574

View full text Add to dashboard Cite

“…The different futures investigated can be broadly grouped into scenario studies on: land management, such as the effects of reduced fertilizer application in agricultural management (e.g. Conan et al, 2003;Chaplot et al, 2004); land use, for example, land cover in view of historical time series (e.g. Bhaduri et al, 2000;Whitehead et al, 2002a,b), or the investigation of spatially explicit changes in land use (e.g.…”

Section: Scenario Predictionsmentioning

confidence: 99%

Current concepts in nitrogen dynamics for mesoscale catchments

Vaché

Jülich

Frede

2008

Hydrological Sciences Journal

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The study of global change impacts on nitrogen dynamics in mesoscale catchments remains an important topic. The primary mechanisms of change can be grouped broadly into those focused on land management, land use, climatic change, as well as on N deposition patterns. The current state of mesoscale studies of N dynamics is outlined in an effort to present the potential tools and methods available to researchers, as well as to outline future directions for additional research. This review focuses on a comparison of the common model approaches that are used to simulate the N cycle in catchments. The review is not meant as an exhaustive list of all models that might include N cycling, but instead outlines a classification framework as a means of better understanding key differences between common modelling strategies. We conclude with a blueprint of what hydro-biogeochemical models should be capable of, and which additional efforts should be considered in the course of model development and verification.Key words agriculture; mesoscale; modelling; nitrogen; process description; spatial resolution Concepts actuels relatifs à la dynamique de l'azote dans les bassins versants de méso-échelleRésumé L'étude des impacts du changement global sur la dynamique de l'azote dans les bassins versants de méso-échelle reste un sujet important. Les principaux mécanismes de changement relèvent globalement de la gestion du territoire, de l'occupation du sol, du changement climatique et des modalités de dépôt d'azote. L'état actuel des études de la dynamique de l'azote à la méso-échelle est souligné avec une attention particulière pour présenter les outils potentiels et les méthodes disponibles pour les chercheurs, et pour identifier les directions futures pour des recherches complémentaires. Cette revue est focalisée sur une comparaison des approches communes de modélisation qui sont utilisées pour simuler le cycle de l'azote dans les bassins versants. La revue ne prétend pas fournir une liste exhaustive des modèles qui intègrent le cycle de l'azote, mais fournit plutôt un cadre de classification permettant de mieux comprendre les différences clefs qui existent entre les stratégies de modélisation courantes. Nous concluons avec une synthèse de ce que les modèles hydro-biogéochimiques devraient permettre, et des efforts additionnels qui devraient être considérés en termes de développement et de vérification de modèle.

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“…This is due to their tautological nature, which does not integrate the proper physical processes, and also to their discretisation which does not account for subcell heterogeneities. Few applications considered the potential reversal of flow at the interface and its impact on nitrate removal at the catchment scale (Conan et al, 2003;Galbiati et al, 2006), but until today the exact quantification of the intensity of the removal due to various processes occurring at the stream-aquifer interface remains uncertain (Flipo et al, 2007a). Although certain control factors of biogeochemical processes occurring at the stream-aquifer interface are known, such as water residence time, nitrate concentration or organic matter content (Carleton and Montas, 2010;Dahm et al, 1998;Hill et al, 1998;Kjellin et al, 2007;Peyrard et al, 2011;Rivett et al, 2008;Weng et al, 2003), as well as water level fluctuations (Burt et al, 2002;Dahm et al, 1998;Hefting et al, 2004;Turlan et al, 2007), numerical models remain limited by their ability to simulate water pathways in the interface properly (Burt, 2005).…”

Section: Introductionmentioning

confidence: 99%

Continental hydrosystem modelling: the concept of nested stream–aquifer interfaces

Flipo

Mouhri

Labarthe

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. Coupled hydrological-hydrogeological models, emphasising the importance of the stream-aquifer interface, are more and more used in hydrological sciences for pluridisciplinary studies aiming at investigating environmental issues. Based on an extensive literature review, stream-aquifer interfaces are described at five different scales: local [10 cm- . This led us to develop the concept of nested stream-aquifer interfaces, which extends the well-known vision of nested groundwater pathways towards the surface, where the mixing of low frequency processes and high frequency processes coupled with the complexity of geomorphological features and heterogeneities creates hydrological spiralling. This conceptual framework allows the identification of a hierarchical order of the multi-scale control factors of stream-aquifer hydrological exchanges, from the larger scale to the finer scale. The hyporheic corridor, which couples the river to its 3-D hyporheic zone, is then identified as the key component for scaling hydrological processes occurring at the interface. The identification of the hyporheic corridor as the support of the hydrological processes scaling is an important step for the development of regional studies, which is one of the main concerns for water practitioners and resources managers.In a second part, the modelling of the stream-aquifer interface at various scales is investigated with the help of the conductance model. Although the usage of the temperature as a tracer of the flow is a robust method for the assessment of stream-aquifer exchanges at the local scale, there is a crucial need to develop innovative methodologies for assessing stream-aquifer exchanges at the regional scale. After formulating the conductance model at the regional and intermediate scales, we address this challenging issue with the development of an iterative modelling methodology, which ensures the consistency of stream-aquifer exchanges between the intermediate and regional scales.Finally, practical recommendations are provided for the study of the interface using the innovative methodology MIM (Measurements-Interpolation-Modelling), which is graphically developed, scaling in space the three pools of methods needed to fully understand stream-aquifer interfaces at various scales. In the MIM space, stream-aquifer interfaces that can be studied by a given approach are localised. The efficiency of the method is demonstrated with two examples. The first one proposes an upscaling framework, structured around river reaches of ∼ 10-100 m, from the local to the watershed scale. The second example highlights the usefulness of space borne data to improve the assessment of streamaquifer exchanges at the regional and continental scales. We conclude that further developments in modelling and field measurements have to be undertaken at the regional scale to enable a proper modelling of stream-aquifer exchanges from the local to the continental scale.

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Modeling Flow and Nitrate Fate at Catchment Scale in Brittany (France)

Cited by 103 publications

References 14 publications

The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions

The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions

Current concepts in nitrogen dynamics for mesoscale catchments

Continental hydrosystem modelling: the concept of nested stream–aquifer interfaces

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