Geoelectrical characterization of hydrological processes in a buried braided river system

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dc.contributor.authorGuinea, Aen_AU
dc.contributor.authorHollins, SEen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorHankin, SIen_AU
dc.contributor.authorCendón, DIen_AU
dc.date.accessioned2017-06-15T05:18:19Zen_AU
dc.date.available2017-06-15T05:18:19Zen_AU
dc.date.issued2016-01-01en_AU
dc.date.statistics2017-06-15en_AU
dc.description.abstractThe Macquarie Marshes (NSW, Australia) cover approximately 200 square km of the Macquarie River flood-plains. The marshes are one of the largest remaining inland semi-permanent wetlands in southeastern Australia. Diversity of fauna and flora has decreased in the wetlands while the flood-drought cycles controlling these ecosystems have been affected by recent human activity. An Electrical Resistivity Tomography survey has been carried out to provide insight into the surface water/ groundwater interactions occurring at the north-western part of the marshes and to identify potential recharge areas of the aquifer systems. In the resistivity sections three main units can be identified: 1. A top unit of low-resistivity (1 to 6 ohm.m) with about 5 meter thick on average. 2. A middle unit of higher electrical resistivity (6 to 20 ohm.m) that continues to a depth of approximately 20 metres and is discontinuous laterally. 3. A bottom unit below a depth of 20 to 25 metres with resistivity decreasing to values similar to those of the top unit. The resistivity results has allowed to identify clay dominated and sand dominated materials. The groundwater is recharged from surface water following sandy windows in the clay created by modern channels on the surface of the marshes.© European Association of Geoscientists & Engineers.en_AU
dc.identifier.citationGuinea, A., Hollins, S., Meredith, K., Hankin, S. & Cendón, D.I. (2016). Geoelectrical characterization of hydrological processes in a buried braided river system. Paper presented at the Near Surface Geoscience 2016 - 22nd European Meeting of Environmental and Engineering Geophysics. Barcelona, Spain, 4-8th September 2016. doi:10.3997/2214-4609.201601955.en_AU
dc.identifier.conferenceenddate8th September 2016en_AU
dc.identifier.conferencenameNear Surface Geoscience 2016 - 22nd European Meeting of Environmental and Engineering Geophysicsen_AU
dc.identifier.conferenceplaceBarcelona, Spainen_AU
dc.identifier.conferencestartdate4th September 2016en_AU
dc.identifier.govdoc7385en_AU
dc.identifier.otherVolume 2016, cp-495-00054en_AU
dc.identifier.urihttp://dx.doi.org/10.3997/2214-4609.201601955en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8717en_AU
dc.language.isoenen_AU
dc.publisherEuropean Association of Geoscientists and Engineers, EAGEen_AU
dc.subjectRiversen_AU
dc.subjectHydrologyen_AU
dc.subjectMarshesen_AU
dc.subjectWetlandsen_AU
dc.subjectEcosystemsen_AU
dc.subjectGround wateren_AU
dc.titleGeoelectrical characterization of hydrological processes in a buried braided river systemen_AU
dc.typeConference Abstracten_AU
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