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The High-water Mark (HWM) indicates the level reached by the sea at high tide, and was drawn as a base reference for the delineation of coastal management lines in the Eden District, Western Cape Province, South Africa. It is primarily based on a line indicating a 1:10yr wave run-up generated with a wave run-up simulation model, but corrections were applied manually after visual inspection. |
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The High-water Mark (HWM) indicates the level reached by the sea at high tide, and was drawn as a base reference for the delineation of coastal management lines in the Eden District, Western Cape Province, South Africa. It is primarily based on a line indicating a 1:10yr wave run-up generated with a wave run-up simulation model, but corrections were applied manually after visual inspection. |
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Created by Royal HaskoningDHV
Project Information owned by the Western Cape Province, Department of Environmental Affairs and Development Planning:
Ms Ieptieshaam Bekko
Sub-Directorate: Coastal Management Directorate: Biodiversity and Coastal Management
Chief Directorate: Environmental Sustainability
4th Floor, Leeusig Building, 1 Dorp Street, Cape Town
Tel: 021 483 3370
E-mail: Ieptieshaam.Bekko@westerncape.gov.za |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The High-water Mark (HWM) indicates the level reached by the sea at high tide, and was drawn as a base reference for the delineation of coastal management lines in the Eden District, Western Cape Province, South Africa. It is primarily based on a line indicating a 1:10yr wave run-up generated with a wave run-up simulation model, but corrections were applied manually after visual inspection using approximate indicators (vegetation line at the top of the beach, wet sands, exposed rock etc. as per aerial photography of 2013). The wave run-up model used MIKE21-FMSW software to calculate onshore wave heights and the EurOtop package to model wave run-up. </SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>The concerned spatial layers were generated using the best information and methods available at the time, and it is acknowledged that this information will change and improve over time. All delineations relate specifically to wave run-up modelling and visual inspections conducted during 2017 and aerial photography from 2013. The scale of investigation and modelling implies that decisions relating to individual properties or locations can be informed further by higher resolution site-specific investigations. </SPAN></P></DIV></DIV> |
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GIS_DB.SDE.HMW_final |
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["High-water mark","Eden District","coastal management lines","Western Cape"] |
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en-US |
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150000000 |
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