Modeling Metal(loid)s Transport in Arid Mountain Headwater Andean Basin: A WASP-Based Approach

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dc.article.number1905
dc.catalogadorgjm
dc.contributor.authorCastillo, Daniela
dc.contributor.authorOyarzún, Ricardo
dc.contributor.authorPastén González, Pablo Arturo
dc.contributor.authorKnightes, Christopher D.
dc.contributor.authorDuhalde, Denisse
dc.contributor.authorArumí, José Luis
dc.contributor.authorNúñez, Jorge
dc.contributor.authorDíaz Sánchez, José Antonio
dc.date.accessioned2025-07-02T14:53:23Z
dc.date.available2025-07-02T14:53:23Z
dc.date.issued2025
dc.description.abstractThe occurrence of toxic metal(loid)s in surface freshwater is a global concern due to its impacts on human and ecosystem health. Conceptual and quantitative metal(loid) models are needed to assess the impact of metal(loid)s in watersheds affected by acid rock drainage. Few case studies have focused on arid and semiarid headwaters, with scarce hydrological and hydrochemical information. This work reports the use of WASP8 (US EPA) to model Al, Fe, As, Cu, and SO42− concentrations in the Upper Elqui River watershed in north–central Chile. Calibrated model performance for total concentrations was “good” (25.9, RRMSE; 0.7, R2-d) to “very good” (0.8–0.9, R2-d). The dissolved concentrations ranged between “acceptable” (56.3, RRMSE), “good” (28.6, RRMSE; 0.7 d), and “very good” (0.9, R2-d). While the model validation achieved mainly “very good” (0.8–0.9, R2-d) predictions for total concentrations, the predicted dissolved concentrations were less accurate for all indicators. Sensitivity analysis showed that the partition coefficient is a sensitive constant for estimating dissolved concentrations, and that integrating sorption and sediment interaction reduces the model error. This work highlights the need for detailed and site-specific information on the reactive and hydrodynamic properties of suspended solids, which directly impact the partition coefficient, sedimentation, and resuspension velocity calibration.
dc.fechaingreso.objetodigital2025-07-02
dc.format.extent29 páginas
dc.fuente.origenORCID
dc.identifier.doi10.3390/w17131905
dc.identifier.urihttps://doi.org/10.3390/w17131905
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/104822
dc.information.autorucEscuela de Ingeniería; Pastén González, Pablo Arturo; 0000-0002-9961-9342; 87432
dc.information.autorucEscuela de Ingeniería; Díaz Sánchez, José Antonio; S/I; 245824
dc.issue.numero13
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaWater
dc.rightsacceso abierto
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectModeling
dc.subjectMetal(loid)s
dc.subjectWASP
dc.subjectWater quality
dc.subjectAcid rock drainage (ARD)
dc.subjectLocal sensitivity
dc.subject.ddc600
dc.subject.deweyTecnologíaes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleModeling Metal(loid)s Transport in Arid Mountain Headwater Andean Basin: A WASP-Based Approach
dc.typeartículo
dc.volumen17
sipa.codpersvinculados87432
sipa.codpersvinculados245824
sipa.trazabilidadORCID;2025-06-30
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