Groundwater response to heavy precipitation.

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dc.contributor.authorWaring, CLen_AU
dc.contributor.authorBradd, Jen_AU
dc.contributor.authorHankin, SIen_AU
dc.date.accessioned2007-11-22T04:06:42Zen_AU
dc.date.accessioned2010-04-30T04:43:09Zen_AU
dc.date.available2007-11-22T04:06:42Zen_AU
dc.date.available2010-04-30T04:43:09Zen_AU
dc.date.issued2003-04en_AU
dc.description.abstractAn investigation of the groundwater response to heavy rainfall at Lucas Heights Science and Technology Centre (LHSTC) is required under the conditions of Facility Licence F0001 for the ANSTO's Replacement Research Reactor. Groundwater continuous hydrograph monitoring has been used for this purpose. Hydrograph data from four boreholes are presented showing the rainfall recorded during the same period for comparison. The drought conditions have provided only limited cases where groundwater responded to a rainfall event. The characteristic response was local caused by saturated soil contributing water directly to the borehole and the falling head as the water was redistributed into the aquifer in a few hours. Hydrograph data from borehole near the head of a gully showed that groundwater flow from the plateau to the gully produced a peak a few days after the rainfall event and that the water level returned to its original level after about 10 days. The hydrograph data are consistent with an imperfect multi-layer groundwater flow regime developed from earlier seismic and geophysical data with decreasing rate of flow in each layer due to decreasing hydraulic conductivity with depth. The contrast in hydraulic conductivity between the thin permeable soil layer and the low permeable sandstone forms an effective barrier to vertical flow.en_AU
dc.identifier.citationWaring, C., Bradd, J., & Hankin, S. (2003). Groundwater response to heavy precipiations (EM/TN/08-2003 rev.0). Lucas Heights, N.S.W.: Australian Nuclear Science and Technology Organisation.en_AU
dc.identifier.govdoc970en_AU
dc.identifier.otherANSTO-EM-TN-08-2003en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/39en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectPrecipitationen_AU
dc.subjectGround wateren_AU
dc.subjectANSTOen_AU
dc.subjectNumerical dataen_AU
dc.titleGroundwater response to heavy precipitation.en_AU
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