Recession discharge from compartmentalized bedrock hillslopes: hydrogeological processes and solutions for model calibration

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dc.catalogadordfo
dc.contributor.authorClement Roques
dc.contributor.authorRonan Abhervé
dc.contributor.authorMarti, Etienne
dc.contributor.authorNicolas Cornette
dc.contributor.authorJean-Raynald de Dreuzy
dc.contributor.authorDavid Rupp
dc.contributor.authorAlexandre Boisson
dc.contributor.authorSarah Leray
dc.contributor.authorPhilip Brunner
dc.contributor.authorJohn Selker
dc.date.accessioned2024-05-03T15:30:33Z
dc.date.available2024-05-03T15:30:33Z
dc.date.issued2024
dc.description.abstractDue to the difficulties of gathering relevant data of groundwater systems and the lack of fundamental physically-based understanding on the processes involved, the representation of groundwater flow heterogeneity in catchment- to regional-scale hydrological models is often overlooked. We often limit the representation of groundwater with simplified homogeneous and shallow aquifers where effective hydraulic properties are derived from global-scale database. This raises questions regarding the validity of such models to quantify the potential impacts of climate change, where subsurface heterogeneity is expected to play a major role in their short- to long- term regulation.We will present the results of a numerical modelling experiment designed to explore the role of the vertical compartmentalization of hillslopes on groundwater flow and recession discharge. We found that, when hydraulic properties are vertically compartmentalized, streamflow recession behaviour may strongly deviate from what is predicted by groundwater theory that considers the drainage of shallow reservoirs with homogeneous properties. We further identified the hillslope configurations for which the homogeneous theory derived from the Boussinesq solution approximately holds and, conversely, for those for which it does not. By comparing the modelled streamflow recession discharge and the groundwater table dynamics, we identify the critical hydrogeological conditions responsible for the emergence of strong deviations. We further present new solutions to better represent subsurface heterogeneity in catchment-scale models and calibrate hydraulic parameters that properly capture the groundwater and streamflow dynamics.
dc.fechaingreso.objetodigital2024-08-27
dc.fuente.origenORCID
dc.identifier.doi10.5194/egusphere-egu24-18302
dc.identifier.urihttps://doi.org/10.5194/egusphere-egu24-18302
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/85439
dc.information.autorucEscuela de Ingeniería; Marti Etienne Bernard Christian; S/I; 1139850
dc.language.isoen
dc.nota.accesocontenido completo
dc.relation.ispartofEGU General Assembly (2024)
dc.rightsacceso abierto
dc.rights.licenseAtribución 4.0 Internacional (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleRecession discharge from compartmentalized bedrock hillslopes: hydrogeological processes and solutions for model calibration
dc.typecomunicación de congreso
sipa.codpersvinculados1139850
sipa.trazabilidadORCID;2024-04-29
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