Modelling evaporative losses from the Darling River during drought using δ2H and δ18O

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dc.contributor.authorHughes, CEen_AU
dc.contributor.authorHollins, SEen_AU
dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorCendón, DIen_AU
dc.date.accessioned2021-03-08T01:41:38Zen_AU
dc.date.available2021-03-08T01:41:38Zen_AU
dc.date.issued2012-01-19en_AU
dc.date.statistics2021-03-05en_AU
dc.description.abstractThe Darling River during drought has great pressure placed on it by extraction and impoundment of water during infrequent flow events throughout the catchment. Within the Darling River Basin evaporative losses can be extreme, contributing to the shortage of water in the system. Isotopic tracers can be used to assess water gains and losses and to separate evaporative losses from groundwater recharge or pumping. This study used ∼3 years of stable water isotope (δ2H and δ18O) data collected monthly at nine stations from Mungindi to Burtundy from 2002 to 2005 to determine the evaporative losses along the Barwon/Darling River. During extended dry periods evaporative enrichment of δ 2H and δ 18O is dramatic and using the Craig and Gordon (1965) model, as elucidated by Gonfiantini (1986), we modelled the fraction remaining after evaporation that is represented by the stable isotope composition of water along the river. This effectively represents a measure of evaporative losses undergone by water since its origin as precipitation within the catchment. Daily losses are commonly in the range of 0.1% to 1% of the original volume. The total level of evaporative loss commonly reached 40-60% between flow events in the upper reaches from Mungindi to Bourke, increasing downstream. Below the Menindee Lakes, evaporative losses were up to 80% due to the long period of impoundment of water in the Menindee Lakes system. © 2012 Engineers Australia.en_AU
dc.identifier.booktitleProceedings of the 34th Hydrology and Water Resources Symposium, Sydney; Australia; 19-22 November 2012en_AU
dc.identifier.citationHughes, C. E., Hollins, S. E., Crawford, J., Meredith, K. T., & Cendón, D. I. (2012). Modelling evaporative losses from the Darling River during drought using δ2H and δ18O. In proceedings of the 34th Hydrology and Water Resources Symposium, Sydney; Australia; 19-22 November 2012, (pp. 423-428). Barton, ACT: Curren Associates Inc.en_AU
dc.identifier.conferenceenddate22 November 2012en_AU
dc.identifier.conferencename34th Hydrology and Water Resources Symposiumen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate19 November 2012en_AU
dc.identifier.isbn9781634399340en_AU
dc.identifier.pagination423-428en_AU
dc.identifier.placeofpublicationBarton, ACTen_AU
dc.identifier.urihttp://www.proceedings.com/25410.htmlen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10491en_AU
dc.language.isoenen_AU
dc.publisherEngineers Australiaen_AU
dc.subjectWatershedsen_AU
dc.subjectDroughtsen_AU
dc.subjectGround wateren_AU
dc.subjectIsotopesen_AU
dc.subjectLakesen_AU
dc.subjectGroundwater rechargeen_AU
dc.subjectRiversen_AU
dc.subjectRunoffen_AU
dc.titleModelling evaporative losses from the Darling River during drought using δ2H and δ18Oen_AU
dc.title.alternativeHydrology and Water Resources Symposium (34th : 2012 : Sydney, N.S.W.)en_AU
dc.typeConference Paperen_AU
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