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Estuaries habitat mapping in the Derwent-2007: A resurvey of marine habitats by SeaMap Tasmania
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Abstract
The Derwent Estuary is a large drowned river valley situated in south-east Tasmania that extends for a distance of 52 kilometres and covers an area of around 195 km\(^2\) between Iron Pot and New Norfolk. The physical structure of the estuary varies substantially along its length, with the upper reaches highly stratified due to consistent freshwater input from the Derwent River and the lower reaches generally well mixed. The freshwater tends to flow on the surface along the eastern shore with saline water travelling upstream on the bottom.
In 2001 the Derwent Estuary was first mapped by SeaMap Tasmania (Marine Research Laboratories, Tasmanian Aquaculture and Fisheries Institute). This year (2007), TAFI along with the Derwent Estuary Program (DEP) initiated a remap of the Derwent Estuary to update the bathymetric and habitat distribution GIS databases.
The Derwent Estuary Program is committed to improving the environmental management strategy for the Derwent Estuary, together with an associated long-term monitoring program and agreements for implementation of specific environmental improvement programs. The results of this co funded survey provide natural resource managers, industry and the community with the information needed to contribute to biodiversity conservation and natural resource management of the Derwent Estuary
| Item Type: | Report (Project Report) |
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| Authors/Creators: | Lucieer, VL and Lawler, MM and Morffew, MG and Pender, AJ |
| Publisher: | Tasmanian Aquaculture and Fisheries Institute |
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