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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

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

F)

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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