Three-dimensional flow patterns at the river–aquifer interface — a case study at the Danube

Derx, Julia; Blaschke, Alfred Paul; Blöschl, Günter

doi:10.1016/j.advwatres.2010.04.013

Cited by 47 publications

(37 citation statements)

References 20 publications

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“…Bedform-induced hyporheic exchanges can be viewed as longitudinally 2-D vertical processes. Similar 2-D horizontal processes also occur in single or alternating unit bars (Burkholder et al, 2008;Cardenas, 2009a;Deforet et al, 2009;Derx et al, 2010;Marzadri et al, 2010;Shope et al, 2012) or bedform discontinuities (Hester and Doyle, 2008).…”

Section: Morphological Shaping Related To the Hydro-sedimentary Rivermentioning

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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Section: Morphological Shaping Related To the Hydro-sedimentary Rivermentioning

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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“…Different from a physically based model, the SW-GW exchange process occurring along the river is not considered in most of the lumped conceptual models [40,41]. The SWAT-LUD model represents an interesting intermediate between the physically based and the lumped conceptual models.…”

Section: Swat-lud Modelmentioning

confidence: 99%

Using SWAT-LUD Model to Estimate the Influence of Water Exchange and Shallow Aquifer Denitrification on Water and Nitrate Flux

Sun

Bernard-Jannin

Grusson

et al. 2018

Water

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Numerous studies have pointed out the importance of groundwater and surface water interaction (SW-GW) in a river system. However; those functions have rarely been considered in large scale hydrological models. The SWAT-LUD model has been developed based on the Soil and Water Assessment Tool (SWAT) model; and it integrates a new type of subbasin; which is called subbasin-LU (SL); to represent the floodplain area. New modules representing SW-GW exchanges and shallow aquifer denitrification are developed in the SWAT-LUD model. In this study; the SWAT-LUD model was applied to the middle floodplain area of the Garonne catchment in France. The results showed that the SWAT-LUD model could represent the SW-GW exchange and shallow aquifer denitrification appropriately. An annual 44.1 × 10 7 m 3 of water flowed into the river from the study area; but the annual exchanged water volume was 6.4 × 10 7 m 3 ; which represented just 1% of the river discharge. A total of 384 tons of N-NO 3 − (0.023 t·ha −1 ) was consumed by denitrification in the floodplain shallow aquifer annually. The nitrate concentration (N-NO 3 − ) decrease in the channel was 0.12 mg·L −1 ; but in the shallow aquifer it reached 11.40 mg·L −1 ; 8.05 mg·L −1 ; and 5.41 mg·L −1 in LU1; LU2; and LU3; respectively. Our study reveals that; in the Garonne floodplain; denitrification plays a significant role in the attenuation of nitrate associated with groundwater; but the impacts of denitrification on nitrate associated with river water is much less significant.

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“…Such water level distributions need to be characterized by their full spatial (i.e. two horizontal dimensions) and temporal variability and ideally are extracted from hydraulic models (Derx et al, 2010;Doppler et al, 2007;Engeler et al, 2011). However, the setup of a hydraulic model is time consuming and requires a considerable amount of data input.…”

Section: Introductionmentioning

confidence: 99%

Assessing the effect of different river water level interpolation schemes on modeled groundwater residence times

Diem

Renard

Schirmer

2014

Journal of Hydrology

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Keywords:River restoration River water level distribution Groundwater residence time Groundwater flow and transport modeling FEFLOW PEST s u m m a r yObtaining a quantitative understanding of river-groundwater interactions is of high practical relevance, for instance within the context of riverbank filtration and river restoration. Modeling interactions between river and groundwater requires knowledge of the river's spatiotemporal water level distribution. The dynamic nature of riverbed morphology in restored river reaches might result in complex river water level distributions, including disconnected river branches, nonlinear longitudinal water level profiles and morphologically induced lateral water level gradients. Recently, two new methods were proposed to accurately and efficiently capture 2D water level distributions of dynamic rivers. In this study, we assessed the predictive capability of these methods with respect to simulated groundwater residence times. Both methods were used to generate surface water level distributions of a 1.2 km long partly restored river reach of the Thur River in northeastern Switzerland. We then assigned these water level distributions as boundary conditions to a 3D steady-state groundwater flow and transport model. When applying either of the new methods, the calibration-constrained groundwater flow field accurately predicted the spatial distribution of groundwater residence times; deviations were within a range of 30% when compared to residence times obtained using a reference method. We further tested the sensitivity of the simulated groundwater residence times to a simplified river water level distribution. The negligence of lateral river water level gradients of 20-30 cm on a length of 200 m caused errors of 40-80% in the calibration-constrained groundwater residence time distribution compared to results that included lateral water level gradients. The additional assumption of a linear water level distribution in longitudinal river direction led to deviations from the complete river water level distribution of up to 50 cm, which caused wide-spread errors in simulated groundwater residence times of 200-500%. For an accurate simulation of groundwater residence times, it is therefore imperative that the longitudinal water level distribution is correctly captured and described. Based on the confirmed predictive capability of the new methods to estimate 2D river water level distributions, we can recommend their application to future studies that model dynamic river-groundwater systems.

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Three-dimensional flow patterns at the river–aquifer interface — a case study at the Danube

Cited by 47 publications

References 20 publications

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

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

Using SWAT-LUD Model to Estimate the Influence of Water Exchange and Shallow Aquifer Denitrification on Water and Nitrate Flux

Assessing the effect of different river water level interpolation schemes on modeled groundwater residence times

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