Coupling surface and subsurface flows in a depth averaged flood wave model

Liang, Dongfang; Falconer, Roger Alexander; Lin, BinLiang

doi:10.1016/j.jhydrol.2007.01.045

Cited by 94 publications

(87 citation statements)

References 15 publications

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“…This is not a problem, as this discontinuity can be interpreted as representative of the streambed load. It should also be noted that the validity of this Recent numerical developments allow for solving the coupled surface and subsurface equations with a matrical system (Gunduz and Aral, 2005;Liang et al, 2007;Peyrard et al, 2008;Qu and Duffy, 2007;Spanoudaki et al, 2009;Yuan et al, 2008). This method can be used whatever the selected stream-aquifer interface model.…”

Section: Models For Simulating Stream-aquifer Interfacementioning

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: Models For Simulating Stream-aquifer Interfacementioning

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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“…Modelling of surface-groundwater interactions needs knowledge of groundwater modelling, but also a detailed understanding of the exchange processes that occur between the surface and sub-surface domains (Barnett et al, 2012). Surface-groundwater interactions have been investigated in several studies (Hoehn and Scholtis, 2011;Lenahan and Bristow, 2010;Sophocleous and Perkins, 2000;Winter, 1999;Kollet and Maxwell, 2006;Krause et al, 2007;Lamontagne et al, 2005;Liang et al, 2007;Meire et al, 2010;Panday and Huyakorn, 2004;Shlychkov, 2008), but floodplains in arid/semi-arid regions have received considerably less attention (Jolly et al, 2008). One of the major limitations in this regard is lack of high quality observed data (Pilgrim et al, 1988).…”

Section: Figmentioning

confidence: 99%

Impacts of groundwater extraction on salinization risk in a semi-arid floodplain

Alaghmand

Beecham

Hassanli

2013

Nat. Hazards Earth Syst. Sci.

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Abstract. In the lower River Murray in Australia, a combination of a reduction in the frequency, duration and magnitude of natural floods, rising saline water tables in floodplains, and excessive evapotranspiration have led to an irrigationinduced groundwater mound forcing the naturally saline groundwater onto the floodplain. It is during the attenuation phase of floods that these large salt accumulations are likely to be mobilised and discharged into the river. This has been highlighted as the most significant risk in the MurrayDarling Basin and the South Australian Government and catchment management authorities have subsequently developed salt interception schemes (SIS). The aim of these schemes is to reduce the hydraulic gradient that drives the regional saline groundwater towards the River Murray. This paper investigates the interactions between a river (River Murray in South Australia) and a saline semi-arid floodplain (Clark's floodplain) that is significantly influenced by groundwater lowering due to a particular SIS. The results confirm that groundwater extraction maintains a lower water table and a higher amount of fresh river water flux to the saline floodplain aquifer. In terms of salinity, this may lead to less solute stored in the floodplain aquifer. This occurs through three mechanisms, namely extraction of the solute mass from the system, reducing the saline groundwater flux from the highland to the floodplain and changing the floodplain groundwater regime from a losing to a gaining one. It is shown that groundwater extraction is able to remove some of the solute stored in the unsaturated zone and this can mitigate the floodplain salinity risk. A conceptual model of the impact of groundwater extraction on floodplain salinization has been developed.

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“…In particular in the analysis presented herein the HLL first order upwind scheme has been implemented and used for integrating the complete and kinematic model while MacCormack (MC) second order space centered scheme has been applied to the complete, diffusive and kinematic model. Several authors have used the MacCormack scheme to simulate the propagation of overland flow processes; among them [2,4,5,12,13].…”

Section: Numerical Modelsmentioning

confidence: 99%

Two-dimensional numerical models for overland flow simulations

Costabile

Costanzo

Macchione

2009

WIT Transactions on Ecology and the Environment

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In this paper the performances of a number of two-dimensional (2D) models for overland flow simulations have been compared; in particular they are based on the shallow water approach according to a fully dynamic, diffusive and kinematic wave modelling. The systems have been numerically solved by using both the MacCormack second order central scheme and HLL first order upwind scheme. The numerical results highlighted that the differences among the simulations are not very important when the simulations refer to commonly used ideal literature tests in which the topography is quite simplified while significant differences have been observed when the topography is more similar to the real situations.

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Coupling surface and subsurface flows in a depth averaged flood wave model

Cited by 94 publications

References 15 publications

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

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

Impacts of groundwater extraction on salinization risk in a semi-arid floodplain

Two-dimensional numerical models for overland flow simulations

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