000057071 001__ 57071
000057071 005__ 20210121114527.0
000057071 0247_ $$2doi$$a10.1016/j.jhydrol.2015.07.028
000057071 0248_ $$2sideral$$a92651
000057071 037__ $$aART-2015-92651
000057071 041__ $$aeng
000057071 100__ $$aAcero, P.
000057071 245__ $$aEvaluation of geochemical and hydrogeological processes by geochemical modeling in an area affected by evaporite karstification
000057071 260__ $$c2015
000057071 5060_ $$aAccess copy available to the general public$$fUnrestricted
000057071 5203_ $$aThe Ebro Valley in the outskirts of Zaragoza (NE Spain) is severely affected by evaporite karstification, leading to multiple problems related to subsidence and sinkhole formation. In this work, a combination of inverse (mixing. +. mass-balance) and forward (reaction-path) geochemical calculations is applied for the quantification of the main karstification processes and seasonal variations in this area. The obtained results prove the suitability of the applied methodology for the characterization of similar problems in other areas with scarce geological and hydrogeological information. The hydrogeology and hydrochemistry of the system can be mainly attributed to the mixing of variable proportions of concentrated groundwater from the evaporitic aquifer and more dilute water from the overlying alluvial aquifer. The existence of a good connection between these aquifers is supported by: (1) the fast changes in the hydrochemistry of the karst aquifer related to recharge by irrigation, and (2) the deduced input of evaporitic groundwater in the alluvial materials. The evolution in some parts of the alluvial/evaporitic aquifer system is clearly dominated by the seasonal variations in the recharge by dilute irrigation waters (up to 95% of water volume in some sinkhole ponds), whereas other points seem to be clearly determined by the hydrochemistry of the concentrated evaporitic aquifer groundwater (up to 50% of the water volume in some springs). The following reactions, previous or superimposed to mixing processes, explain the observed hydrochemistry in the studied area: dissolution of halite (NaCl), gypsum (CaSO4{dot operator}2H2O)/anhydrite (CaSO4) and dolomite (CaMg(CO3)2), CO2(g) input and degassing and calcite (CaCO3) dissolution/precipitation. The modeling results suggest the existence of a large spatial variability in the composition of the evaporitic groundwater, mainly caused by large differences in the availability of halite in contact with the groundwater. Active subsidence associated with halite dissolution is expected to continue in the study area, together with the episodic increase of gypsum dissolution associated with the input of dilute irrigation waters.
000057071 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2010-16775$$9info:eu-repo/grantAgreement/ES/DGA/2012/GA-LC-021$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2013-40867-P
000057071 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000057071 590__ $$a3.043$$b2015
000057071 591__ $$aENGINEERING, CIVIL$$b5 / 126 = 0.04$$c2015$$dQ1$$eT1
000057071 591__ $$aWATER RESOURCES$$b6 / 85 = 0.071$$c2015$$dQ1$$eT1
000057071 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b33 / 184 = 0.179$$c2015$$dQ1$$eT1
000057071 592__ $$a1.686$$b2015
000057071 593__ $$aWater Science and Technology$$c2015$$dQ1
000057071 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000057071 700__ $$0(orcid)0000-0003-1463-1682$$aAuqué, L.F.$$uUniversidad de Zaragoza
000057071 700__ $$0(orcid)0000-0001-5780-821X$$aGalve, J.P.
000057071 700__ $$0(orcid)0000-0002-5407-940X$$aGutiérrez, F.$$uUniversidad de Zaragoza
000057071 700__ $$0(orcid)0000-0001-6175-0364$$aCarbonel, D.$$uUniversidad de Zaragoza
000057071 700__ $$0(orcid)0000-0001-5645-9150$$aGimeno, M.J.$$uUniversidad de Zaragoza
000057071 700__ $$aYechieli, Y.
000057071 700__ $$aAsta, M.P.
000057071 700__ $$0(orcid)0000-0001-7275-9321$$aGómez, J.B.$$uUniversidad de Zaragoza
000057071 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Petrología y Geoquímica
000057071 7102_ $$12000$$2427$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Externa
000057071 773__ $$g529 (2015), 1874-1889$$pJ. hydrol.$$tJOURNAL OF HYDROLOGY$$x0022-1694
000057071 8564_ $$s1356291$$uhttps://zaguan.unizar.es/record/57071/files/texto_completo.pdf$$yPostprint
000057071 8564_ $$s54360$$uhttps://zaguan.unizar.es/record/57071/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000057071 909CO $$ooai:zaguan.unizar.es:57071$$particulos$$pdriver
000057071 951__ $$a2021-01-21-11:07:14
000057071 980__ $$aARTICLE