hydrometric site selection training for png power port moresby july 2012
TRANSCRIPT
HYDROMETRIC SITE SELECTION
Training for PNG PowerPort Moresby
July 2012
SITE SELECTION CRITERIA (GENERAL)• Occupational Health and Safety
• Purpose
• Vandalism
• Power requirements
• Telemetry requirements
• Permissive occupancy
• Accessibility
SITE SELECTION CRITERIA (METEOROLOGICAL)
• Minimal effects from wind
X √
SITE SELECTION CRITERIA (METEOROLOGICAL)
• Even ground
X √
SITE SELECTION CRITERIA (METEOROLOGICAL)
• 1:4 ratio of surrounding features
X
Minimum 4x
SITE SELECTION CRITERIA (METEOROLOGICAL)
• Height of rim above GL (30-100cm)
Standard Rain Gauge (Daily Read)
Tipping Bucket Rain Gauge
300mm
1000mm
Typical Meteorological Installations
‘Vandalism’- Meteorological
SITE SELECTION CRITERIA (STREAM)• Control (stable & sensitive)• Straight section (min.100m upstream & downstream)• ‘Contained’ flow (no side channels)• Subterranean flow• Stable bed and banks• Gauge pool (aquatic growth, depth, negligible approach
velocities)• Location of instrumentation• Survey marks• Downstream effects (tidal, water storages)• Low, Medium and High flow gauging sections• Water quality considerations
Typical Stream Gauging Station Installations
Typical Stream Gauging Station Installations
‘Vandalism’- Stream
‘Vandalism’- Stream
References
• World Meteorological Organisation – Guide to Hydrological Practices (WMO No.168)
• Snowy Mountains Hydro-Electric Authority – Hydrographic Course (September 1966)
• AS3778 ‘ Measurement of water flow in open channels’
Questions ?