Multi-hazard management of coastal zones supported by HF radar

Heron, Mal, Gomez, Roberto, Weber, Bernd, Thomas, Nicholas, Dzvonkovskaya, Anna, and Helzel, Thomas (2016) Multi-hazard management of coastal zones supported by HF radar. In: [Presented at the 14th International Coastal Symposium]. From: ICS 2016: 14th International Coastal Symposium, 6-11 March 2016, Sydney, NSW, Australia.

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Abstract

HF radars have been installed in many coastal sites around the world to monitor ocean parameters between the coast and maximum of about 250 km offshore. The main product of phased array radars is gridded maps of surface currents, wave heights and wind directions. Maps of surface currents (see Figure 1) can be produced every 10 – 20 minutes which, in real-time, improve navigation safety in restricted areas commonly found near ports and harbours. The time-sequence of surface current maps enables Langrangian tracking of small parcels of surface water. This analysis of the data is being used for hazard mitigation in managing suspended sediments in dredging, in emergency situations where flotsam and other drifting items need to be found, and in pollution control.

Additionally the surface current measurement capability is used to assist tsunami warnings. The newly launched Tsunami Warning Center in Oman includes a network of phased-array HF radars to provide real-time tsunami monitoring.

Real-time mapping of significant wave heights is being used to improve operational safety for coastal shipping and small boats. Long-term records of wave heights are needed for managing the coastal environment.

Wind direction maps are being used to locate the position of cold fronts in the open ocean and to monitor the timing and strength of sea-breeze fronts in key locations.

This paper presents case studies showing how HF radars are currently being used for monitoring these ocean parameters at various sites around the world. The oral presentation will end with an example of hazards whose impact could be reduced with an HF radar installation.

Item ID: 48024
Item Type: Conference Item (Abstract / Summary)
Keywords: HF ocean radar; hazards, tTsunami
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Date Deposited: 11 May 2017 03:56
FoR Codes: 04 EARTH SCIENCES > 0405 Oceanography > 040503 Physical Oceanography @ 100%
SEO Codes: 96 ENVIRONMENT > 9610 Natural Hazards > 961006 Natural Hazards in Marine Environments @ 100%
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