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

2. BACKGROUND In 2007, Hydrological Services was approached by Haiduong Co. Ltd to provide a solution for flood warning After careful consideration, the RainTrak, all in one rainfall product was offered with some modifications to facilitate a siren and larger solar panel Solution required for early warning for evacuating villages in northern Vietnam 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 Threshold No. Rainfall Rate (mm per 3 hours) No. of Siren Activations (5 minute intervals) 1801 2902 31003

9. ALARM PROTOCOLS Rainfall Rate (mm / 3 hrs) 100 80 90 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) Alarm No. 1 Alarm No. 2Alarm No. 3

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)