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TRANSCRIPT
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Peter Hanington University of Queensland
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Our waterways and catchments will, by 2020, be a healthy
ecosystem supporting the livelihoods and lifestyles of residents
and visitors and will be managed through collaboration between
community, government and industry.
Healthy Waterways Vision
!! Special collaboration between government, industry, researchers and community
!! Working towards understanding, planning for and managing the use of waterways and catchments in South East Queensland (SEQ)
Who makes up the Partnership ?
!! The Partnership includes 6 Queensland government
agencies, all 19 local governments in the region, 4 universities, 30 major industries and 38 catchment, landcare,
environment and community groups
!! A Secretariat provides the day-to-day coordination for the
partners and undertakes the regional programs including monitoring and reporting
!! Healthy Waterways is the umbrella ‘brand’ for the campaign aimed at decision makers and the public
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•!SEQ Regional Plan
•!Moreton Bay Water Quality
Improvement Plan
•!EHMP 5 year trends
•!SEQ Regional Water
Supply Strategy
•!SEQ Regional NRM Plan
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SEQ Healthy Waterways Strategy
Overall Approach:
•! Protect
•! Stabilise
•! Restore
1. Protection & conservation
3. Management of urban diffuse sources
4. Management of rural diffuse sources
5. Restoration of riparian and wetlands
6. Managing changes to hydrology
2. Management of point sources
Areas of Action:
Need to balance activities in the catchment with uses/values
farming
industry
urbanisation
aquaculture
grazing
fishing boating
drinking water
ecosystem
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Nutrient Movement
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12/10/09
Scenario: Turbidity Annual Median Concentrations
Current: 2004 with
committed upgrades
2026 Business As
Usual: 2026 with
committed upgrades
Maximum Investments
for Load Reduction:
100% reuse, 100%
WSUD in greenfield,
100% retrofit, 50%
reduction in rural diffuse
loads
Intermediate
Investments for Load
Reduction: 50% reuse,
100% WSUD in
greenfield, 50% retrofit,
20% reduction in rural
diffuse loads No SEQRWQMS WQO
exists for Turbidity in the
Moreton Bay
0-2 NTU
2-4 NTU
4-6 NTU
6-10 NTU
10-20 NTU
>20 NTU
From a regional scale, we can identify where the problems are.
Modelling suggests 70% sediment in Bay comes from <30% catchment area
Tracer study confirms that most sediment comes from soils on Marburg formation rocks Caitcheon & Howes (2005)
identify the dominant processes
Channel Erosion Hillslope Erosion
About 46% of the 48,000 km of
streams in SEQ has poor riparian condition
Degraded riparian lands
•! Channel erosion is source of most sediments delivered to the lower Brisbane & Logan Rivers
•! Other source is cultivated surface soils
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We know what restoration is required.
riparian revegetation?
gully stabilization?
channel/bank restoration?
Key challenge: spatial optimisation
How do we spatially arrange restoration in the landscape to ensure that we get the best “bang for buck”?
Spatial scale of riparian influence on stream health?
length and width Optimum spatial arrangement of restoration?
Are there priority areas (eg high sediment yield)? Does one large continuous section = several small ones?
Socioeconomic issues – willingness/ability for adoption?
Addressing rural diffuse loads has technical, socio-economic and institutional challenges
Integrated and whole-of-systems approach to
water management
Links between water quality and water quantity in rural and urban areas
Healthy Waterways Strategy -- Qld Water Plan -- Regional Water Supply Strategy &
Drought Management Strategy -- Water Resource Plans -- Water Recycling Action Plan
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28 Estuarine sites
sampled monthly Nov. 2007 - Oct. 08
15 freshwater sites
sampled once in Oct. – Nov. 2007
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SEQ EHMP Estuarine/Marine Indicators
Water Quality Indicators (monthly)
Physico – chemical:
•! Water depth •! pH
•! Temperature
•! Salinity •! Dissolved oxygen
•! Turbidity
Nutrients:
•! Total nutrients (nitrogen and phosphorus) •! Dissolved nutrients (nitrate, nitrite, ammonium,
and phosphate)
•! Total dissolved solids
•! Chlorophyll a
Biological Health Indicators (biannual)
•! Seagrass depth range •! Riparian vegetation
assessment
•! Coral cover
•! Lyngbya •! d15N mapping
•! Nutrient processing
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Estuarine Water Quality Objectives
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Calculation of Estuarine/Bay Report Card Grades)
" ! EHI (Ecosystem Health Index) - Proportion of the waterways that complies
with the established objectives (from SEQRWQMS)
" ! BHR (Biological Health Rating) - incorporates indicators without
established objectives.
" ! EHI weighting - 80%, BHR weighting - 20%
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2007-08 Estuarine Results - Tweed
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Delta 15N – Sewage plume mapping
Links to management
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