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Caught off guard with lack of reliable data
In 2011, heavy rains during the monsoon season triggered severe flooding throughout the country. In Bangkok, flooding along the Chao Phraya River affected vast areas of the Thai capital.
With 900 factories in 28 provinces badly impacted, Thailand’s manufacturing industry took a massive hit. In addition, more than 20,000 km2 of farmland was damaged. After the waters receded, more than 800 people were found dead and the country’s economic losses stood at more than USD 45 billion.
Without reliable and current flood data, Thailand was caught off guard. Authorities weren’t able to take preventive measures or make decisions on-the-spot to alleviate the devastating impacts of serious floods.
Fully aware that this will happen again, Thailand knew it had to act swiftly.
Using a Decision Support System to forecast floods
To better manage flood events, the Hydro and Agro Informatics Institute (HAII) – part of the Thai Ministry of Science and Technology – decided to establish an operational water management Decision Support System (DSS).
Driven by MIKE Powered by DHI’s MIKE OPERATIONS, the DSS is able to provide forecasted levels and discharges at 28 locations up to seven days in advance.
Once a day, four MIKE FLOOD models in the system, each covering separate flood plain areas, run in hindcast mode. This brings all model parameters up-to-date, reflecting current hydrological conditions.
The system performs forecast simulations if needed, and imports rainfall levels hourly and meteorological forecasts twice a day.
Better flood preparation, safer people and businesses
The Decision Support System is programmed to extract data according to the simulation period, checking the range, rate of change and missing data. It then submits a daily data quality assurance report. Users can access the following from its interface:
- Real-time data
- Forecast data
- Water balance analysis
- Flood management tools
Armed with current and reliable flood data before and during the monsoon season, Thai authorities could now better manage their flood planning – especially along the entire 160,000 km2 Chao Phraya River Basin – well ahead of time.