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Rainfall (‘ RainTrak ’) 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 (‘RainTrak’)Flood Warning System Hanoi, Vietnam 7th 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 • After careful consideration, the RainTrak, ‘all in one’ rainfall product was offered with some modifications • 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 and demonstration
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 ML1 Data Logger: - external GSM modem (Wavecom) - digital input - internal power supply - option for external power - RS232 interface - compact design Enclosure: - IP65 rating - powder-coated steel
PROVEN TECHNOLOGY • HS TB4 Gauge widely used around the world (822 units sold to Thailand Meteorological Service in 2008) • ‘Minilog’ range of loggers sold to Water Authorities within South East Asia and Australia (1200 units provided to Queensland Department of Water Resources in 2007 and 2008) • All equipment will stand up to high temperatures and humidity • All equipment supplied with 3 years warranty
MODIFICATIONS UNDERTAKEN • Large Capacity Solar panel: 12V, 20W • Large deep cycle battery: 12V, 38aH
SYSTEM SETTINGS Dial-In Function: - allows user to dial-in for rainfall readings - allows user to dial-in to re-configure logger
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)