Connecting bacterial colonization to physical and biochemical changes in a sand box infiltration experiment
dc.contributor.author
dc.date.accessioned
2015-11-18T10:07:53Z
dc.date.available
2015-11-18T10:07:53Z
dc.date.issued
2014
dc.identifier.issn
0022-1694
dc.identifier.uri
dc.description.abstract
Infiltration through sediments is linked to complex biogeochemical processes occurring at small spatial scales, often leading to a progressive reduction in infiltration rates due to microbial growth and/or mechanical clogging. Unraveling the linkage between microbial dynamics and water infiltration in a heterogeneous medium is of concern in artificial recharge ponds and natural infiltration systems. We present an 84-day laboratory infiltration experiment that aims at studying the temporal variation of selected biogeochemical parameters at different depths along the infiltration path. The experimental setup consists of a 1.2. m high tank packed with a heterogeneous soil and instrumented with arrays of sensors as well as soil and liquid samplers. Results indicate that: (i) microbial processes are responsible for infiltration reduction, enhancing the spatially heterogeneous distribution of infiltration rates with time, (ii) bacteria and extracellular polymeric substances (EPS) are present at all monitored depths, indicating the potential for deep biological clogging, (iii) bacteria functioning and richness exhibit depth zonation after the system reaches a mature state and (iv) the retention curve changes towards highest saturation by the end of the experiment. The increase in water holding capacity is largest at depth, where the presence of EPS is noticeable. The reduction in time of the quantity of water infiltrating along the tank can only be accounted for with a truly interdisciplinary approach involving physical, chemical and biological processes
dc.description.sponsorship
The project has received founding from the European Union's Seventh Framework Program for research, technological development and demonstration under grant agreement No. PCOFUND-GA-2008-226070. Financial support from the ICREA Academia Program and the Spanish Ministry of Economy and Competitiveness, projects SCARCE (Consolider-Ingenio CSD2009-00065), FLUMED-HOTSPOTS (CGL2011-30151-C02-01), and FEAR (CGL2012-38120), as well as the EU project MARSOL (FP7-ENV-2013, Grant No 619120) is also gratefully acknowledged
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//CGL2011-30151-C02-01/ES/HOT-SPOTS BIOGEOQUIMICOS Y MICROBIANOS EN RIOS MEDITERRANEOS. ESTRUCTURA Y FUNCION DEL BIOFILM MICROBIANO Y SU IMPLICACION EN LA GESTION DE LA CALIDAD DE LAS AGUAS FLUVIALES/
info:eu-repo/grantAgreement/MICINN//CSD2009-00065/ES/Evaluación y predicción de los efectos del cambio global en la cantidad y la calidad del agua en ríos ibéricos/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.jhydrol.2014.05.041
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© Journal of Hydrology, 2014, vol. 517, p. 317-327
dc.relation.ispartofseries
Articles publicats (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Connecting bacterial colonization to physical and biochemical changes in a sand box infiltration experiment
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
021732
dc.contributor.funder
dc.relation.ProjectAcronym