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The proportion of coastline artificially modified (by deliberate engineering works) in each coastal georegion, and as a proportion of the total State coastline. Does not include coastlines unintentionally modified by human activity (e.g. by erosion) or by deliberate non-engineering activities such as planting marram grass. This is an indicator of pressure. Although artificial physical modification of shorelines is not the only human pressure that can affect natural coastal geomorphic processes, it is a major category of disturbance that not only affects geomorphic processes but also the physical integrity of significant coastal geoheritage sites. Artificial modification of shorelines has major impacts on geomorphic processes such as coastal sediment transport (both longshore and onshore-offshore), and can cause major or total modification of natural coastal forms. Considered together with other indicators, this indicator provides a useful measure of the extent to which human activities are likely to have impacted on processes along coastlines.
The distribution of substantially or wholly artificial shorelines (red) around the Tasmanian coastline is presented in the figure below (click on figure to enlarge).
A total of 132 distinctive coastal georegions have been classified around the Tasmanian coast, most of which comprise a number of separate coastal segments. Of these coastal georegions, 92 are not identified as having any substantial artificially modified shorelines. However, 40 coastal georegions include varying percentages of artificial coastline. The following table lists the 40 georegions having a proportion of artificial coastline. A full version of the results including all georegions can be downloaded. Tasmanian coastal georegions that include a proportion of wholly or substantially artificial coastline Coastal georegion Total length (km) % of Tas. coast Artificial part (km) Artificial % of georegion 0006322 21.8 0.3 5.0 23.0 0001222 9.5 0.2 2.1 21.8 0002132 49.4 0.8 10.0 20.3 0001332 20.2 0.3 3.4 16.9 0003332 21.3 0.3 2.6 12.4 0002222 43.5 0.7 5.2 12.0 0004332 16.5 0.3 1.9 11.3 0006222 33.7 0.5 3.7 11.0 0001132 368.7 5.7 27.9 7.6 0006122 39.0 0.6 2.8 7.2 0011232 35.1 0.6 2.4 6.9 0004232 132.9 2.1 9.0 6.8 0001232 137.6 2.1 7.8 5.7 0002122 65.3 1.0 3.4 5.3 0001122 43.6 0.7 2.2 4.9 0009122 72.3 1.1 3.5 4.9 0003232 256.7 4.0 11.9 4.6 0008122 57.2 0.9 2.5 4.4 0002232 51.6 0.8 2.1 4.2 0004132 162.9 2.5 6.7 4.1 0041332 3.0 0.1 0.1 4.0 0003122 91.6 1.4 3.6 3.9 0004222 126.4 2.0 4.7 3.7 0004122 69.2 1.1 2.3 3.3 0011132 57.1 0.9 1.7 3.0 0041122 11.9 0.2 0.3 2.8 0003132 123.2 1.9 2.7 2.2 0045232 35.7 0.6 0.6 1.6 0000132 20.7 0.3 0.3 1.5 0003222 358.6 5.6 5.1 1.4 0011122 378.8 5.9 4.1 1.1 0000112 26.4 0.4 0.1 0.6 0041232 29.2 0.5 0.1 0.5 0041222 24.1 0.4 0.1 0.4 0006232 70.7 1.1 0.2 0.4 0004322 31.4 0.5 0.1 0.4 0006132 146.8 2.3 0.4 0.3 0011322 78.1 1.2 0.2 0.3 0009112 221.5 3.4 0.4 0.2 0011222 317.9 4.9 0.2 0.1 Source: Data derived from Tasmanian Shoreline Geomorphic Types v.2 2002 (Sharples 2002) Adapted from ANZECC core indicator E+S 1. |
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