A conceptual–numerical model to simulate hydraulic head in aquifers that are hydraulically connected to surface water bodies

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dc.contributor.author Pulido Velázquez, David
dc.contributor.author Sahuquillo, Andrés
dc.contributor.author Andreu, Joaquín
dc.date.accessioned 2020-11-26T12:52:20Z
dc.date.available 2020-11-26T12:52:20Z
dc.date.issued 2012-05-03
dc.identifier.citation Hydrological Processes, vol.26, n.10, 1435-1448 es_ES
dc.identifier.issn 1099-1085
dc.identifier.uri http://hdl.handle.net/20.500.12468/622
dc.description.abstract In this paper, we present a conceptual‐numerical model that can be deduced from a calibrated finite difference groundwater‐flow model, which provides a parsimonious approach to simulate and analyze hydraulic heads and surface water body–aquifer interaction for linear aquifers (linear response of head to stresses). The solution of linear groundwater‐flow problems using eigenvalue techniques can be formulated with a simple explicit state equation whose structure shows that the surface water body–aquifer interaction phenomenon can be approached as the drainage of a number of independent linear reservoirs. The hydraulic head field could be also approached by the summation of the head fields, estimated for those reservoirs, defined over the same domain set by the aquifer limits, where the hydraulic head field in each reservoir is proportional to a specific surface (an eigenfunction of an eigenproblem, or an eigenvector in discrete cases). All the parameters and initial conditions of each linear reservoir can be mathematically defined in a univocal way from the calibrated finite difference model, preserving its characteristics (geometry, boundary conditions, hydrodynamic parameters (heterogeneity), and spatial distribution of the stresses). We also demonstrated that, in practical cases, an accurate solution can be obtained with a reduced number of linear reservoirs. The reduced computational cost of these solutions can help to integrate the groundwater component within conjunctive use management models. Conceptual approximation also facilitates understanding of the physical phenomenon and analysis of the factors that influence it. A simple synthetic aquifer has been employed to show how the conceptual model can be built for different spatial discretizations, the parameters required, and their influence on the simulation of hydraulic head fields and stream–aquifer flow exchange variables. A real‐world case was also solved to test the accuracy of the proposed approaches, by comparing its solution with that obtained using finite‐difference MODFLOW code es_ES
dc.description.sponsorship Unidad de Valencia, Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Departamento de Ingeniería Hidráulica y Medio Ambiente, Universidad Politécnica de Valencia, España es_ES
dc.language.iso en es_ES
dc.publisher Wiley es_ES
dc.rights Acceso abierto es_ES
dc.subject conceptual‐numerical model es_ES
dc.subject eigenvalue techniques es_ES
dc.subject aquifer hydraulically connected es_ES
dc.subject hydraulic head es_ES
dc.subject management optimization models es_ES
dc.title A conceptual–numerical model to simulate hydraulic head in aquifers that are hydraulically connected to surface water bodies es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.8214 es_ES
dc.identifier.doi https://doi.org/10.1002/hyp.8214 es_ES

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