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Sinkhole hazards in Tasmania.


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Kiernan, K 1989 , 'Sinkhole hazards in Tasmania.', paper presented at the Engineering and environmental impacts of sinkholes and karst : 3rd Multidisciplinary Conference on Sinkholes , 12-4 October 1989, Florida.

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Subsidence and collapse have occurred in surficial mantles of
glacial, glaciofluvial, periglacial and alluvial origin that are
widespread overlying karstified rocks in Tasmania. Stnkholes have
formed in several areas within a few years of forests being cleared
for pasture or by the timber industry. These sinkholes have probably
resulted from increased water movement through the regolith due to
decreased transpiration, coupled with the rotting of tree roots that
formerly helped bind the regolith. Other sinkholes have formed at
some road margins, particularly where culvert design is poor, and some
of these collapses have damaged roads. Sinkholes that are probably
the result of groundwater pumping have formed adjacent to a large
limestone quarry. Because economic losses associated with individual
sinkhole incidents have generally been comparatively minor, and
because the incidents have been geographically dispersed, they have
attracted little official attention. However, the individuals
affected may suffer significant personal loss and the combined cost of
karst-related land surface instability in Tasmania is probably

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Kiernan, K
Journal or Publication Title: Proceedings of the third multidisciplinary conference on sinkholes and the engineering and environmental impacts of karst
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ISBN: 9061919878

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