To what extent do long-duration high-volume dam releases influence river–aquifer interactions? A case study in New South Wales, Australia

Handle URI:
http://hdl.handle.net/10754/575624
Title:
To what extent do long-duration high-volume dam releases influence river–aquifer interactions? A case study in New South Wales, Australia
Authors:
Graham, Peter W.; Andersen, M. S.; McCabe, Matthew ( 0000-0002-1279-5272 ) ; Ajami, Hoori; Baker, Andy R.; Acworth, I.
Abstract:
Long-duration high-volume dam releases are unique anthropogenic events with no naturally occurring equivalents. The impact from such dam releases on a downstream Quaternary alluvial aquifer in New South Wales, Australia, is assessed. It is observed that long-duration (>26 days), high-volume dam releases (>8,000 ML/day average) result in significant variations in river–aquifer interactions. These variations include a flux from the river to the aquifer up to 6.3 m3/day per metre of bank (at distances of up to 330 m from the river bank), increased extent and volume of recharge/bank storage, and a long-term (>100 days) reversal of river–aquifer fluxes. In contrast, during lower-volume events (<2,000 ML/day average) the flux was directed from the aquifer to the river at rates of up to 1.6 m3/day per metre of bank. A groundwater-head prediction model was constructed and river–aquifer fluxes were calculated; however, predicted fluxes from this method showed poor correlation to fluxes calculated using actual groundwater heads. Long-duration high-volume dam releases have the potential to skew estimates of long-term aquifer resources and detrimentally alter the chemical and physical properties of phreatic aquifers flanking the river. The findings have ramifications for improved integrated management of dam systems and downstream aquifers.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Earth System Observation and Modelling
Publisher:
Springer Science + Business Media
Journal:
Hydrogeology Journal
Issue Date:
20-Nov-2014
DOI:
10.1007/s10040-014-1212-3
Type:
Article
ISSN:
14312174
Sponsors:
HA, AB, MM, MS and IA were supported by the National Centre for Groundwater Research and Training (NCGRT), an Australian Government initiative, funded by the Australian Research Council and the National Water Commission. PG was supported by the NCGRT and New South Wales Science Leveraging Fund (NSW SLF). Infrastructure was funded by the NSW SLF and the Groundwater Education Investment Fund. Water level and climate data used in the research are available at http://groundwater.anu.edu.au
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGraham, Peter W.en
dc.contributor.authorAndersen, M. S.en
dc.contributor.authorMcCabe, Matthewen
dc.contributor.authorAjami, Hoorien
dc.contributor.authorBaker, Andy R.en
dc.contributor.authorAcworth, I.en
dc.date.accessioned2015-08-24T08:34:27Zen
dc.date.available2015-08-24T08:34:27Zen
dc.date.issued2014-11-20en
dc.identifier.issn14312174en
dc.identifier.doi10.1007/s10040-014-1212-3en
dc.identifier.urihttp://hdl.handle.net/10754/575624en
dc.description.abstractLong-duration high-volume dam releases are unique anthropogenic events with no naturally occurring equivalents. The impact from such dam releases on a downstream Quaternary alluvial aquifer in New South Wales, Australia, is assessed. It is observed that long-duration (>26 days), high-volume dam releases (>8,000 ML/day average) result in significant variations in river–aquifer interactions. These variations include a flux from the river to the aquifer up to 6.3 m3/day per metre of bank (at distances of up to 330 m from the river bank), increased extent and volume of recharge/bank storage, and a long-term (>100 days) reversal of river–aquifer fluxes. In contrast, during lower-volume events (<2,000 ML/day average) the flux was directed from the aquifer to the river at rates of up to 1.6 m3/day per metre of bank. A groundwater-head prediction model was constructed and river–aquifer fluxes were calculated; however, predicted fluxes from this method showed poor correlation to fluxes calculated using actual groundwater heads. Long-duration high-volume dam releases have the potential to skew estimates of long-term aquifer resources and detrimentally alter the chemical and physical properties of phreatic aquifers flanking the river. The findings have ramifications for improved integrated management of dam systems and downstream aquifers.en
dc.description.sponsorshipHA, AB, MM, MS and IA were supported by the National Centre for Groundwater Research and Training (NCGRT), an Australian Government initiative, funded by the Australian Research Council and the National Water Commission. PG was supported by the NCGRT and New South Wales Science Leveraging Fund (NSW SLF). Infrastructure was funded by the NSW SLF and the Groundwater Education Investment Fund. Water level and climate data used in the research are available at http://groundwater.anu.edu.auen
dc.publisherSpringer Science + Business Mediaen
dc.subjectAustraliaen
dc.subjectDam releasesen
dc.subjectGroundwater/surface-water relationsen
dc.subjectSurface water hydrologyen
dc.subjectWater managementen
dc.titleTo what extent do long-duration high-volume dam releases influence river–aquifer interactions? A case study in New South Wales, Australiaen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentEarth System Observation and Modellingen
dc.identifier.journalHydrogeology Journalen
dc.contributor.institutionConnected Waters Initiative Research Centre, UNSW AustraliaSydney, NSW, Australiaen
dc.contributor.institutionSGA Environmental, Suite 8, 599 Pacific HighwaySt Leonards, NSW, Australiaen
dc.contributor.institutionWater Research Centre, UNSW AustraliaSydney, NSW, Australiaen
kaust.authorMcCabe, Matthewen
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