Transcript DISCHARGE RATING VERIFICATION

RQ30 RADAR SYSTEM
(An Australian Perspective)
Malaysia JPS Offices
Ampang, Kuala Lumpur
8th May 2012
SYSTEM INTEGRATION
RQ30 RADAR SYSTEM IN
GENERAL
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‘Non-contact’ water level and velocity sensing system
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Low cost installation with minimal environmental impact
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Low cost operation
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Low powered system (suits DC power with solar)
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Easily interfaced with existing data loggers and telemetry
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Provides theoretical stream discharge rating from Day 1 using accepted hydraulic
methodology
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Accurate cross-section required with an estimate of channel roughness co-efficient(s)
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Number of options for mounting
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Can be installed facing upstream or downstream directions
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Senses reverse velocity
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Suits wide natural streams or narrow man-made channels
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Analysis software detects hysteresis and discharge rating changes
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Widely used (> 350 system worldwide)
INSTALLATION TYPES
• Bridge Installation
• Davit Arm Installation
• Cableway Installation
Bridge Installation
• Most common type of installation
• Bridge does not need to be at 90° to stream flow (but preferable)
• Can be installed on top, under or on the side of the bridge
structure
Davit Arm Installation
• Used for narrower channels with stable bank access
• Retractable arm is an option
• Some limitations (e.g. positioning sensor on centre line of stream)
Typical Installation
• Alternative for sites where no bridge is available
• Uses infrequently used existing cableway systems
• Measures need to be taken to minimise effects of wind and air
temperature
• Data transmission to bank by cable or wireless
Cableway Installation
• Alternative for sites where no bridge is available
• Uses infrequently used existing cableway systems
• Measures need to be taken to minimise effects of wind and air
temperature
• Data transmission via cable or using ‘wireless’ method
• Availability of data reporting via FTP
Existing Cableway Installation
Existing Cableway Installation
New Cableway Installation
Tidal Situations
(Reverse Velocity)
Hysteresis Effects
Discharge Rating Changes
Irrigation Canal
Sewage Treatment Plant
Channel
Questions ? ?