2020-10-21 Final Order - Approval Conditions and Approved Plans - P&E Appeal No 61 of 2018 - RAL17-0504

4.4           During a Flood – Self Evacuation
Triggers for Action: Major flooding in Noosa River at the Tewantin River Gauge (at 1.8mAHD), 24hr
daily totals of greater than 300mm recorded with more rainfall forecast, quantified level of 1.3mAHD or
greater at site flood height gauge
◼     A flood height siren will be issued to the whole site if forecasts suggest that significant flooding of the site
      is possible. It will be issued whenever:
      ◼   The site flood height gauge reaches a level of 1.3m AHD (between the 2% and 5% AEP).
◼     Residents who consider they could not tolerate several days isolation and those with medical conditions
      including Children, Elderly, infirm and people that may require medical attention during the period of
      isolation must self-evacuate BEFORE Lake Weyba Drive is covered by flood water. If there is water over
      road – cease evacuation and shelter in place.
Please note the Noosa Shire Council’s simulations of the 1992 historic event indicate the following times,
(following activation of the siren) are application:
•     RL 1.3 to RL1.5 (nominally the point at which the road is inundated) = approximately 2 hours
•     RL 1.5 to RL 1.8 (the point at which the road is no longer trafficable) = approximately 8 hours




Flood Emergency Management Plan | 27 February 2020
135 Lake Weyba Drive, Noosaville                                                                              Page 18
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