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Restoring Lake Pedder: a geomorphological perspective on recovery prospects and likely time scales


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Kiernan, K 2001 , Restoring Lake Pedder: a geomorphological perspective on recovery prospects and likely time scales.

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Available under University of Tasmania Standard License.


This paper assesses the prospects for the return of the landforms of the Lake Pedder area to their pre-jlooding
condition should the Huon and Serpentine Dams be drained Restoration of Lake Pedder lVould not be a
practical option unless those landforms that evolved in response to geomorphological processes that are no
longer experienced remain intact. However, there is every reason to anticipate that they have survived
essentially unscathed. Those landforms that have resultedfrom geomorphic processes that persist to the present
day are a less troublesome proposition because any moderate-scale damage to the beach and dune systems may
be naturally self-healing. However, the evidence indicates that only velY minor damage occurred duringfilling
of the dams when the water levels placed the dunes most at risk, and they have been insulated below the level of
effective wave erosion since that time.
Erosion around the perimeter of the Huon - Serpentine Impoundment has not had any significant detrimental
impact upon the key landforms that contribute to the geoscientific values of Lake Pedder and its landform
community. While the public perception may be that a massive area has been devastated, erosion is confined to
the perimeter of the artificial reservoir where it is akin in extent and appearance to that produced by
discontinuous stretches of vehicular track. From an aesthetic perspective the terrain visible from Pedder Beach
contains relatively limited areas of severe scarring. Many of the classic photographic images of Lake Pedder,
focussed as they are on the beach environment, will probably be achievable again almost immediately upon
draining of the dams.

Item Type: Report (Discussion Paper)
Authors/Creators:Kiernan, K
Keywords: Australia, Tasmania, Lake Pedder, geomorphology, geoconservation, restoration, lakeshore erosion
Publisher: University of Tasmania
Additional Information:

Published in Sharples, C., (ed.) Lake Pedder: Values and Restoration, Occasional Paper no. 27, Centre for Environmental Studies, University of Tasmania, pp 153-176.ISBN 0859019705

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