Groundwater–surface water exchange from temperature time series: A comparative study of heat tracer methods

Simple item page
dc.article.number130955
dc.catalogadoryvc
dc.contributor.authorSaphores Zaldivar, Erik
dc.contributor.authorLeray Sarah, Tiphaine Lucile
dc.contributor.authorSuárez Poch, Francisco
dc.contributor.otherCEDEUS (Chile)
dc.date.accessioned2024-09-12T19:24:12Z
dc.date.available2024-09-12T19:24:12Z
dc.date.issued2024
dc.description.abstractThe importance of the interaction between groundwater and surface water is increasingly being recognized for both understanding and managing water systems. Many efforts have been made to characterize and quantify groundwater–surface water exchange. In particular, temperature–based methods have quickly established themselves given their monetary and practical advantages. In the last 15 years, several methods for interpreting passive temperature time series measured in the streambed have been developed. Still, the benchmarking of these methods has only been carried out in specific and distinct hydrological conditions. This article aims to fill this research gap by benchmarking the performance of six commonly used methods for deriving seepage fluxes using a two-year-long temperature time series covering various meteorological and thermal conditions. This work compares three analytical methods that calculate seepage flux using the amplitude and/or phase of the temperature signals, and three numerical methods that use different schemes to inversely solve the one–dimensional heat transport equation in the streambed. The temperature measurements were made in the context of an international dispute between Chile and Bolivia over the status and use of the waters of the Silala River, Northern Chile. Flux estimations are tested against Darcy’s flux derived from measured hydraulic gradient and hydraulic conductivity. Flux estimations from the benchmarked methods ranged from − 0.5 to 3.5 m/d (with positive fluxes directed downwards), whereas fluxes estimated using Darcy’s law ranged from 0.5 to 6 m/d. Results show that the amplitude method is the best–performing method. This method is best suited for estimating the direction of the fluxes, while the method using both the thermal amplitude and phase is best suited for monthly flux trends, and the combination of a Local Polynomial (LP) method and a Maximum Likelihood Estimator (MLE) method (LPMLEn) is appropriate for estimating flux in transient conditions. The use of heat as a tracer proved to be an effective tool for monitoring groundwater–surface water exchange in a river reach for two years, and yielded exchange flux estimates with lower point-scale variability than Darcy’s law.
dc.fechaingreso.objetodigital2024-09-12
dc.format.extent16 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.jhydrol.2024.130955
dc.identifier.urihttps://doi.org/10.1016/j.jhydrol.2024.130955
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87859
dc.identifier.wosidWOS:001202081400001
dc.information.autorucEscuela de Ingeniería; Saphores Zaldivar, Erik; S/I; 1025926
dc.information.autorucEscuela de Ingeniería; Leray Sarah, Tiphaine Lucile; S/I; 1044639
dc.information.autorucEscuela de Ingeniería; Suárez Poch, Francisco; 0000-0002-4394-957X; 15891
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaJournal of Hydrology
dc.rightsacceso restringido
dc.subjectSilala River
dc.subjectInternational watercourse
dc.subjectThermal methods
dc.subjectGroundwater–surface water interactions
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleGroundwater–surface water exchange from temperature time series: A comparative study of heat tracer methods
dc.typeartículo
dc.volumen632
sipa.codpersvinculados1025926
sipa.codpersvinculados1044639
sipa.codpersvinculados15891
sipa.trazabilidadORCID;2024-03-04
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Abstract_Groundwater surface water exchange.pdf
Size:
42.32 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas
CEDEUS