Stable water isotopes and Rn-222 to determine dam and groundwater contribution to baseflow and event flow in a small agricultural catchment

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dc.contributor.authorHughes, CEen_AU
dc.contributor.authorScarff, SAen_AU
dc.contributor.authorMorrison, TNen_AU
dc.contributor.authorFischer, MJen_AU
dc.contributor.authorAdams, GAen_AU
dc.contributor.authorHart, MRen_AU
dc.date.accessioned2021-03-08T02:00:16Zen_AU
dc.date.available2021-03-08T02:00:16Zen_AU
dc.date.issued2009-04-22en_AU
dc.date.statistics2021-03-05en_AU
dc.description.abstractIn order to improve local water managers understanding of nutrient inputs into Sydney’s drinking water catchments, a detailed study of nutrients in stream flow has been carried out in the headwaters of Kellys Ck in the New South Wales southern highlands, Australia. One component of this study attempted to determine the flow pathways contributing to base flow and to runoff generation during a rainfall event over a 128 ha catchment area.Rainfall, stream, shallow groundwater, spring and dam samples were collected during base flow (pre-event), flow event and post event periods around a 4 day rainfall event in July 2008. Samples were analysed for stable water isotopes, Rn-222, DOC, nutrients and major ions. Hydrograph separation and transit time distribution modellingwere used to examine the contribution of event water, dam water and pre-event water to stream flow for a 9 day pe-riod encompassing the rain event. The results show that pre-event and event water contribute equally to stream flow with the pre-event contribution dominated by evaporated water (pre-event dam storage and soil water) rather than the more depleted shallow groundwater and spring water. Rn-222 was also used to understand the spatial variation of groundwater contribution during base flow conditions. © Author(s) 2009en_AU
dc.identifier.citationHughes, C. E., Scarff, S. A., Morrison, T., Fischer, M, J., Adams, G. A., & Hart, M. R. (2009). Stable water isotopes and Rn-222 to determine dam and groundwater contribution to baseflow and event flow in a small agricultural catchment. Paper presented to the EGU General Assembly 2009, Vienna, Austria, 19-24 April 2009. Retrieved from https://meetingorganizer.copernicus.org/EGU2009/EGU2009-6685.pdfen_AU
dc.identifier.conferenceenddate24 April 2009en_AU
dc.identifier.conferencenameEGU General Assembly 2009en_AU
dc.identifier.conferenceplaceVienna, Austriaen_AU
dc.identifier.conferencestartdate19 April 2009en_AU
dc.identifier.otherEGU2009-6685en_AU
dc.identifier.urihttps://meetingorganizer.copernicus.org/EGU2009/EGU2009-6685.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10492en_AU
dc.language.isoenen_AU
dc.publisherEuropean Geosciences Unionen_AU
dc.subjectAustraliaen_AU
dc.subjectNew South Walesen_AU
dc.subjectWatershedsen_AU
dc.subjectIsotopesen_AU
dc.subjectStable isotopesen_AU
dc.subjectRunoffen_AU
dc.subjectRain wateren_AU
dc.subjectGround wateren_AU
dc.titleStable water isotopes and Rn-222 to determine dam and groundwater contribution to baseflow and event flow in a small agricultural catchmenten_AU
dc.typeConference Presentationen_AU
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