Flooding visualisations
Mott MacDonald were comissioned to simulate storm events in Hirael Bay to compare the effectiveness of the different defence options that are being considered. The key at the bottom right of each simulation shows how deep the water is during various stages of the storm event. For a full explanation of the animations, please click below…
Walkaway scenario: 2055 sea level
This flood animation shows the flood extent and water depth caused by a 1 in 50 year (2% chance of occuring in a single year), 8-hour long storm event if there were no defences in place in 2055, and if the current promenade was left unmaintained.
In this scenario, the existing coastal frontage is overtopped and enters Hirael via Beach Road east car park, and crosses Beach Rd and travels up Llys Emyrs. Water St, Orme Rd, Seiriol Rd and Glandwr Rd are also indundared in this scenario.
Walkaway scenario: 2020 sea level
This flood animation shows the flood extent and water depth caused by a 1 in 50 year (2% chance of occuring in a single year), 8-hour long storm event if there were no defences in place in 2020, and if the current promenade was left unmaintained.
In this scenario, the flooding is less severe. However, the coastal frontage is still overtopped and sea water still enters Hirael via Beach Road east car park and inundates Beach Rd and Llys Emyrs.
Defences in place scenario: 2020 sea level
3D Model of the proposal
Hirael flood prevention scheme
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