Castlereagh River
Water Quality and River Flow Objectives

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This section gives the Water Quality Objectives (WQOs) and the River Flow Objectives (RFOs) for the Castlereagh River catchment, which should be used to develop plans and actions affecting water quality and river health. Only the priority RFOs are listed in this section, but the remaining objectives still need to be considered when developing flow management plans or dealing with particular local river conditions.

Town water supply subcatchments

Streams within these subcatchments feed into a town water supply storage. In some cases the catchment may be declared specially protected to minimise the effects of land use on water quality.

Map: This category applies to streams running through areas coloured light blue on the map.

Top of PageWater Quality Objectives

Protection of:

Aquatic ecosystems
Visual amenity
Drinking water-Disinfection only
Drinking water-Clarification and disinfection
Drinking water-Groundwater

Top of PageRiver Flow Objectives

Protect pools in dry times
Protect natural low flows
Maintain natural flow variability
Manage groundwater for ecosystems
Minimise effects of weirs and other structures
Minimise effects of dams on water quality

Supporting information

Mainly forested areas

Streams in mainly forested areas are often valued for their conservation or recreational values. They usually have relatively natural flows and water quality.

Map: This category includes state forests, national parks and nature reserves, coloured green on the map. Also applies to other areas of natural vegetation if any are defined locally.

Top of PageWater Quality Objectives

Protection of:

Aquatic ecosystems
Visual amenity
Secondary contact recreation
Primary contact recreation
Drinking water at point of supply-Disinfection only
Drinking water at point of supply-Clarification and disinfection
Drinking water at point of supply-Groundwater
Aquatic foods (cooked)

Top of PageRiver Flow Objectives

All RFOs apply and most if not all objectives are currently being met. Priority action is unlikely to be necessary in relation to any flow objectives.

Supporting information

Waterways affected by urban development

Waterways within urban areas are often substantially modified and generally carry poor-quality stormwater. Local communities are often keen to see these waterways returned to more natural conditions.

Map: These areas are shown as orange dots on the map.

Top of PageWater Quality Objectives

Protection of:

Aquatic ecosystems
Visual amenity
Secondary contact recreation, as a short-term objective, within 5 years
Primary contact recreation: assess opportunities to achieve as a longer term objective, 10 years or more

Top of PageRiver Flow Objectives

Protect pools in dry times
Protect natural low flows
Maintain natural rates of change in water levels
Minimise effects of weirs and other structures

Top of PageSupporting information

Uncontrolled streams

This category applies to all streams, wetlands and natural watercourses that are not in the other categories.

Map: Uncontrolled streams are shown as blue lines on the map.

Top of PageWater Quality Objectives

Protection of:

Aquatic ecosystems
Visual amenity
Secondary contact recreation
Primary contact recreation
Livestock water supply
Irrigation water supply
Homestead water supply
Drinking water at point of supply-Disinfection only
Drinking water at point of supply-Clarification and disinfection
Drinking water at point of supply-Groundwater
Aquatic foods (cooked)

Top of PageRiver Flow Objectives

Protect pools in dry times
Protect natural low flows
Minimise effects of weirs and other structures

For wetlands, high-flow channels, remnant floodplain vegetation and adjoining lands and watercourses, the following objectives also apply:

Protect important rises in water levels
Maintain wetland and floodplain inundation
Mimic natural drying in temporary waterways

For groundwater areas that sometimes feed into streams, or are naturally shallow enough to supply trees, or have rising water tables:

Manage groundwater for ecosystems

Supporting information

Controlled rivers with reduced flows

A significant proportion of the flow in this river is diverted in dry to normal seasons. Water is diverted upstream of this reach to supply Coonabarabran, and directly from this reach to meet irrigation, stock and domestic needs.

Map: These rivers are shown as red lines on the map.

Top of PageWater Quality Objectives

Protection of:

Aquatic ecosystems
Visual amenity
Secondary contact recreation
Primary contact recreation
Livestock water supply
Irrigation water supply
Homestead water supply
Drinking water at point of supply-Disinfection only
Drinking water at point of supply-Clarification and disinfection
Aquatic foods (cooked)

Top of PageRiver Flow Objectives

Protect pools in dry times
Protect natural low flows
Protect important rises in water levels
Maintain natural flow variability
Minimise effects of weirs and other structures

Supporting information

This page was published 1 May 2006

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