derm iwc chinese delagation_greg long 301109
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Environmental Values, Water Quality Objectives,Aquatic Ecosystem Health reporting
no/minor impact moderate impact major/verymajorimpact
Example Site
Selected reference site locations are indicated bynumbers on the right-hand side of the riskassessment diagrams
Environmental FlowObjectives:
The deviation below thisEFO should be minimized asthere may be an increasedrisk of unacceptableenvironmental degradation.
Environmental Protection (Water) Policy 1997
What are EnvironmentalValues (EVs)?
EVs are the qualities of a water thatsupport:
(A) aquatic ecosystems and
(B) human uses/values
All waterways will possess the aquaticecosystem EV and in most cases,other human uses/values will alsoapply.
EVs are protected from the effects ofpollutants by achieving water qualityobjectives
Stock watering
Primary Recreation
Irrigation
Farm Supply
Industrial Use
HUMAN USE EVsAQUATIC
ECOSYSTEMEV
What are Water QualityObjectives (WQOs)?
Measures of water qualityindicators (physical, chemical, orbiological measures) that protectthe environmental values of thewater
The WQO is the most stringentset of WQGs to support allidentified EVs
© 2009 SEQ Healthy Waterways Partnership
© 2009 SEQ Healthy Waterways Partnership
Ratings used to present averaged assessments in this report
RatingAverage difference from reference
conditionInterpretation
green In reference condition Good condition
yellow < 20 % Slightly disturbed condition
orange > 20% and < 50 % Moderately disturbed condition
red > 50 % Highly disturbed condition
grey No assessment available No assessment available