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Rainfall (Siren Activated) Flood Warning System

Rainfall (Siren Activated) Flood Warning System. Hanoi, Vietnam 7 th November 2008. BACKGROUND. In 2007, Hydrological Services was approached by Haiduong Co. Ltd to provide a solution for flood warning. Solution required for ‘early’ warning for evacuating villages in northern Vietnam.

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Rainfall (Siren Activated) Flood Warning System

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  1. Rainfall (Siren Activated) Flood Warning System Hanoi, Vietnam 7th November 2008

  2. BACKGROUND • In 2007, Hydrological Services was approached by Haiduong Co. Ltd to provide a solution for flood warning • Solution required for ‘early’ warning for evacuating villages in northern Vietnam • After careful consideration, the RainTrak, ‘all in one’ rainfall product was offered with some modifications to facilitate a siren and larger solar panel • Product design was a ‘combined effort’ between Hydrological Services Australia and Haiduong Co. Ltd, Hanoi, Vietnam • A ‘prototype’ system was sent to Vietnam for evaluation

  3. SYSTEM DESIGN CRITERIA TB4 Tipping Bucket Rain Gauge: - accuracy +/-2% 25 to 300mm/hr ; +/- 3% 300-500mm/hr - maximum range 500mm/hr - stainless steel bucket pivots - metal enclosure/catch with syphon iRIS220 Data Logger: - ‘on board’ GSM modem - alarm and control functions - digital inputs - digital control outputs (siren) - internal power supply - option for external power - direct connection to solar - RS232 interface - compact design Enclosure: - IP65 rating - powder-coated steel

  4. SYSTEM PROTOTYPE

  5. MODIFICATIONS UNDERTAKEN • Large Capacity Solar panel: 12V, 20W • Large deep cycle battery: 12V, 38aH • iQUEST iRIS220 Data Logger with specialised alarm software and in-built GSM modem

  6. PROVEN TECHNOLOGY • HS TB4 Gauge widely used around the world (822 units sold to Thailand Meteorological Service in 2008) • ‘iRIS’ range of loggers sold to many Water Authorities within New Zealand and Australia • All equipment will stand up to high temperatures and humidity • All equipment supplied with 3 years warranty

  7. iQUEST PRODUCT - Client List

  8. SIREN ACTIVATION THRESHOLDS

  9. ALARM PROTOCOLS Rainfall Rate (mm / 3 hrs) 100 Alarm No. 2 Alarm No. 3 90 Alarm No. 1 80 Time 1 Siren Activation every 5 minutes 2 Siren Activations every 5 minutes 3 Siren Activations every 5 minutes SMS MESSAGE SENT (UP TO 2 PHONE NUMBERS)

  10. SYSTEM SETTINGS SMS Function: - sends SMS message to 2 pre-programmed phone numbers - a different message for each alarm criteria • PC Activated ‘Changes’: • - rainfall thresholds for each alarm (e.g. 80mm / 3 hrs) • - number of siren activations for each alarm • siren activation timing for each alarm (e.g. ON 1 sec / OFF 1 sec) • siren activation interval (e.g. 5 minute between activations) • SMS phone number • Customised SMS message for each alarm Other Functions: - direct connection of PC to change parameters / settings - dial-in connection of PC to change parameters / settings

  11. POWER SUPPLY DATA • Average continuous power consumption = 10mA (approximately) • 12V: 38aH battery will last in excess of 3 months without solar charging • 20 watt solar panel will fully charge the battery (with 4-5 days of good solar exposure)

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