Evaluation of the use of reach transmissivity to quantify exchange between groundwater and surface water

Nemeth, Mark; Solo‐Gabriele, Helena M.

doi:10.1016/s0022-1694(02)00419-5

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…At the regional scale, most of the hydrogeological models are limited in taking into account local processes such as the effect of near-river pumping, or storage in the hyporheic zone, because they require a very fine spatial discretisation, which can be incompatible with the resolution of the model or, which drastically decreases the efficiency of the model. Also, the use of regional models for solving local issues, as well as the reverse, leads to equifinality problems (Beven, 1989;Beven et al, 2011;Ebel and Loague, 2006;Klemes, 1983;Polus et al, 2011), boundary condition inconsistencies (Noto et al, 2008), or computational burdens (Jolly and Rassam, 2009). The use of local models for solving regional issues entails the same effects Gunduz, 2003, 2006;Wondzell et al, 2009).…”

Section: Up-and Downscaling Stream-aquifer Exchangesmentioning

confidence: 99%

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

Flipo¹,

Mouhri²,

Labarthe³

et al. 2014

Preprint

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Abstract. Recent developments in hydrological modelling are based on a view of the interface being a single continuum through which water flows. These coupled hydrological-hydrogeological models, emphasising the importance of the stream–aquifer interface, are more and more used in hydrological sciences for pluri-disciplinary studies aiming at investigating environmental issues. This notion of a single continuum, which is accepted by the hydrological modellers, originates in the historical modelling of hydrosystems based on the hypothesis of a homogeneous media that led to the Darcy law. There is then a need to first bridge the gap between hydrological and eco-hydrological views of the stream–aquifer interfaces, and, secondly, to rationalise the modelling of stream–aquifer interface within a consistent framework that fully takes into account the multi-dimensionality of the stream–aquifer interfaces. We first define the concept of nested stream–aquifer interfaces as a key transitional component of continental hydrosystem. Based on a literature review, we then demonstrate the usefulness of the concept for the multi-dimensional study of the stream–aquifer interface, with a special emphasis on the stream network, which is identified as the key component for scaling hydrological processes occurring at the interface. Finally we focus on the stream–aquifer interface modelling at different scales, with up-to-date methodologies and give some guidances for the multi-dimensional modelling 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. The outcome of MIM is the localisation in space of the stream–aquifer interface types that can be studied by a given approach. The efficiency of the method is demonstrated with two approaches from the local (~1 m) to the continental (<10 M km2) scale.

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Section: Up-and Downscaling Stream-aquifer Exchangesmentioning

confidence: 99%

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

Flipo¹,

Mouhri²,

Labarthe³

et al. 2014

Preprint

View full text Add to dashboard Cite

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“…Municipal water budgets for the lower east coast of Florida indicate that recharge of central Everglades water into the Biscayne aquifer and eastward movement toward domestic well fields is an important source of drinking water. There is still not enough understanding of the source areas, flow paths, and travel times required for Everglades surface water to reach domestic water-supply well fields (Sonenshein 2001;Nemeth and Solo-Gabriele 2001) Role of changing hydrologic and chemical sources on Everglades ecology An increased proportion of surface-water inflows relative to rainfall and increased mineral inputs are some of many processes driving changes in the structure and function of the Everglades. The subtle biological and geochemical dependencies that are being altered by increased mineral inputs have not been investigated to the same extent as nutrient pollution (McCormick et al 1998), increased variability in water levels and incidences of peat-burning fires, and processes affected by the velocity of sheetflow in the Everglades (Larsen et al 2007).…”

Section: Ionic Tracersmentioning

confidence: 99%

Groundwater’s significance to changing hydrology, water chemistry, and biological communities of a floodplain ecosystem, Everglades, South Florida, USA

Harvey

McCormick

2008

Hydrogeol J

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The Everglades (Florida, USA) is one of the world's larger subtropical peatlands with biological communities adapted to waters low in total dissolved solids and nutrients. Detecting how the pre-drainage hydrological system has been altered is crucial to preserving its functional attributes. However, reliable tools for hindcasting historic conditions in the Everglades are limited. A recent synthesis demonstrates that the proportion of surface-water inflows has increased relative to precipitation, accounting for 33% of total inputs compared with 18% historically. The largest new source of water is canal drainage from areas of former wetlands converted to agriculture. Interactions between groundwater and surface water have also increased, due to increasing vertical hydraulic gradients resulting from topographic and water-level alterations on the otherwise extremely flat landscape. Environmental solute tracer data were used to determine groundwater's changing role, from a freshwater storage reservoir that sustained the Everglades ecosystem during dry periods to a reservoir of increasingly degraded water quality. Although some of this degradation is attributable to increased discharge of deep saline groundwater, other mineral sources such as fertilizer additives and peat oxidation have made a greater contribution to water-quality changes that are altering mineralsensitive biological communities.

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“…3.3 in Newson 1994) and there are numerous hydrological methods and refinements (e.g. Nathan and McMahon 1990;Nemeth and Solo-Gabriele 2003) for computing the 'base flow index', the ratio of base flow to total flow derived from a hydrograph separation of daily flows (Gustard 1996). Although there are many methods for computing base flow and most are rather arbitrary (Nathan and McMahon 1990), these estimates are highly correlated (Vanni et al 2001) and base-flow indexes have proved useful for classifying rivers at a regional scale.…”

Section: Catchment-and Regional-scale Dependencymentioning

confidence: 99%

Rivers as groundwater-dependent ecosystems: a review of degrees of dependency, riverine processes and management implications

2006

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Many rivers are classified as groundwater-dependent ecosystems (GDEs), owing to the contribution of groundwater to their base flow. However, there has been little explicit recognition of the way groundwater influences riverine biota or processes, how degrees of ecological dependency may vary, and the management implications of this dependency. The permeable beds and banks of these GDEs where surface water and groundwater exchange are termed 'hyporheic zones'. They are often inhabited by invertebrates, with varying reliance on groundwater, although the ecological roles of these invertebrates are little known. Upwelling hyporheic water can promote surface primary productivity, influence sediment microbial activity, and affect organic matter decomposition. In many intermittent streams, variable groundwater inputs alter the duration of flow or water permanence, and the duration and timing of these largely govern the biota and rates of many ecosystem processes (e.g. leaf decomposition). Not only is the physical presence of water important, thermal and chemical conditions arising from groundwater inputs also have direct and indirect effects on riverine biota and rates or types of in-stream processes. Differing degrees of dependency of rivers on groundwater mediate all these influences, and may change over time and in response to human activities. Alteration of groundwater inputs through extraction from riparian wells or changes in local water table have an impact on these GDEs, and some current management plans aim to restrict groundwater extraction from near permeable river channels. However, these are often 'blanket' restrictions and the mechanisms of GDE dependency or timing of groundwater requirements are poorly understood, hampering refinement of this management approach. More effective management of these GDEs into the future can result only from a better understanding of the mechanisms of the dependency, how these vary among river types and what in-stream changes might be predicted from alteration of groundwater inputs.

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Evaluation of the use of reach transmissivity to quantify exchange between groundwater and surface water

Cited by 15 publications

References 9 publications

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

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

Groundwater’s significance to changing hydrology, water chemistry, and biological communities of a floodplain ecosystem, Everglades, South Florida, USA

Rivers as groundwater-dependent ecosystems: a review of degrees of dependency, riverine processes and management implications

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