The impact of de-icing salts on alpine bogs in Kosciuszko National Park

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dc.contributor.authorHocking, RKen_AU
dc.contributor.authorGreene, RSBen_AU
dc.contributor.authorHughes, CEen_AU
dc.contributor.authorJohnston, SGen_AU
dc.contributor.authorGrover, Sen_AU
dc.date.accessioned2021-05-04T06:25:13Zen_AU
dc.date.available2021-05-04T06:25:13Zen_AU
dc.date.issued2011-07-04en_AU
dc.date.statistics2021-03-11en_AU
dc.description.abstractSeveral roads in Kosciuszko National Park (KNP), NSW, are kept open each winter with the use of snow ploughs and the de-icing salts; sodium chloride and calcium chloride. Alpine Bogs and Fens, which are endangered Sphagnum cristatum bog communities of high conservation significance, receive saline run–off from de-iced roads in KNP. Chloride de-icing salts raise the osmotic potential of soil water, degrade soil physical properties and both sodium and chloride ions are toxic to alpine flora. However, The impact of de-icing salts on alpine environments has not been previously studied in Australia. To establish salt loads and residence times in Alpine Bogs bog ground water electrical conductivity (EC) was measured weekly using a network of piezometers in sixteen roadside bogs during winter and spring 2010. A treatment of 7.5kg of NaCl and 1Gbq of tritium (3H) was diluted into 100l of water and applied to two bogs to establish if de-icing salts moved slower through the bogs than ground water. Monitoring revealed a significant flux of salt through roadside bogs. ECs were raised significantly in salted bogs with levels highest closest to the road 3520uS/cm and dropping to 100uS/cm at a distance of 120m from the road. The 3H injection suggests NaCl moves slower than ground water and salts have a shorter residence time in wetter bogs. The results indicate that Alpine Bog hydrology is significantly altered by current snow clearing practices. Peak ECs are significantly higher than the 30uS/cm of undisturbed bogs and may potentially retard bog flora vigour.en_AU
dc.identifier.citationHocking, R., Greene., Hughes, C., Johnston, S., & Grover. S. (2011). The impact of de-icing salts on Alpine Bogs in Kosciuszko National Park. Paper presented to the 2011 International Union of Geodesy and Geophysics (IUGG) General Assembly, Earth on the Edge: Science for a Sustainable Planet, 28 June - 7 July 2011, Melbourne, Australia. Retrieved from http://iugg.org/archive/iugg2011/tourhosts.com.au/live/iugg2011/pdf/IUGG2011_FinalEntireProgram.6June.pdfen_AU
dc.identifier.conferenceenddate7 July 2011en_AU
dc.identifier.conferencename2011 International Union of Geodesy and Geophysics (IUGG) General Assembly, Earth on the Edge: Science for a Sustainable Planeten_AU
dc.identifier.conferenceplaceMelbourne, Australiaen_AU
dc.identifier.conferencestartdate28 June 2011en_AU
dc.identifier.urihttp://iugg.org/archive/iugg2011/tourhosts.com.au/live/iugg2011/abstracts/pdf/abstracts/81106015_HOCKING01530.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10750en_AU
dc.language.isoenen_AU
dc.publisherInternational Union of Geodesy and Geophysicsen_AU
dc.subjectPublic landsen_AU
dc.subjectSnowen_AU
dc.subjectIceen_AU
dc.subjectSaltsen_AU
dc.subjectSodium chloridesen_AU
dc.subjectCalcium chloridesen_AU
dc.subjectAustraliaen_AU
dc.subjectSwampsen_AU
dc.subjectRecreational areasen_AU
dc.subjectSeasonsen_AU
dc.subjectSalinityen_AU
dc.subjectParksen_AU
dc.subjectNew South Walesen_AU
dc.titleThe impact of de-icing salts on alpine bogs in Kosciuszko National Parken_AU
dc.typeConference Abstracten_AU
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