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Water quality in karstlands at Mole Creek, Tasmania


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Eberhard, R and Houshold, I (2002) Water quality in karstlands at Mole Creek, Tasmania. Papers and Proceedings of the Royal Society of Tasmania, 136. pp. 159-172. ISSN 0080-4703

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Samples from 28 sites at Mole Creek were analysed for a range of water quality indicators. Low or negligible bacterial counts were obtained
for sites with mainly forested catchments; cleared catchments gave more variable and generally higher results. Higher turbidity and nitrate
levels were recorded in cleared catchments, suggesting increased erosion and nutrient loading of streams. A comparison of water quality
parameters at streamsinks and related springs shows that the karst aquifer is not an efficient water purifier. Rapid capture of surface run off via
solutional openings, coupled with the pipe-like efficiency with which karst conduits transfer the water, constrains the potential for
the karst aquifer to ameliorate water pollution problems. This connection between surface and underground environments is a key
consideration for sustainable land management in karstlands. We conclude that karst aquifers have more in common with surface streams
than non-karstic ground-water systems, in terms of their water purification properties. Water from two bores was found to be relatively
free of microbiological pollution, despite being located in disturbed catchments. This suggests that ground-water sourced from bores is
less affected by activities at the surface, although further work is required to confirm this.

Item Type: Article
Authors/Creators:Eberhard, R and Houshold, I
Keywords: Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title: Papers and Proceedings of the Royal Society of Tasmania
Page Range: pp. 159-172
ISSN: 0080-4703
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

Copyright Royal Society of Tasmania

Date Deposited: 21 May 2012 02:39
Last Modified: 15 Sep 2017 01:06
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