Storm surges associated with severe tropical cyclones are among the
most hazardous and damaging natural disasters to coastal areas. The
Gulf of Thailand has been periodically affected by typhoon induced
storm surges in the past (e.g. storm Harriet in 1962, storm Gay in
1989 and storm Linda in 1997). Due to increased touristic / economic
development and increased population density in the coastal zone, the
combined effect and risk of high water level and increased rainfall /
river discharge has dramatically increased and are expected to
increase in future due to climate change effects.
In this webinar, we will show the development and implementation of
the first real-time operational storm surge, wave and wave setup
forecasting system in the Gulf of Thailand, a joint applied research
initiative by Deltares in The Netherlands and the Hydro and Agro
Informatics Institute (HAII) in Thailand. The modelling part includes
a new hydrodynamic model to simulate tides and storm surges and two
wave models (regional and local). The hydrodynamic model is based on
Delft3D Flexible Mesh ( Delft3D
FM), capable of simulating water levels and detailed flows. The
regional and the recently-developed local wave model are based on the
SWAN model, a third-generation wave model. The operational platform is
based on Delft-FEWS software,
which coordinates all the data inputs, the modelling tasks and the
automatic forecast exports including overland inundation in the upper
Gulf of Thailand.
The main objective of the Gulf of Thailand EWS is to provide daily
accurate storm surge, wave and wave setup estimates automatically with
various data exports possibilities to support this task. It adds a
coastal component to HAII’s existing practice of providing daily
reports on fluvial flood forecasts, used for decision-support in
issuing flood warnings for inland water systems in Thailand. Every
day, three-day coastal forecasts are now produced based on the latest
regional meteorological predictions.
Panel of experts
During the webinar, we had a panel of experts available to
answer questions received via text. After the webinar presentation,
there was an opportunity to ask verbal questions to the presenter.
For the webinar recordings, please visit https://www.deltares.nl/en/webinars/ocean-modelling-and-early-warning-system-for-the-gulf-of-thailand/.