Pimpama/ Coomera Rivers Catchment and Estuary
|  | | | | Pimpama Catchment Facts |
| | - Total area: 171km2
- Stream network length: 389km
- Local Councils: Gold Coast City Council
- Dominant land uses: native bush, urban, grazing, intensive agriculture
- Dominated by intensive agriculture along the middle reaches
- Urban development, including canal estates, expanding throughout the lower catchment
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| | | Coomera Catchment Facts |
| | - Total area: 489km2
- Stream network length: 928km
- Local Councils: Beaudesert (pop. 62,441), Gold Coast (pop. 472,279)
- Dominant land uses: native bush, rural residential, grazing, urban
- Headwaters rise in Lamington National Park and remain largely intact
- Mid reaches flow through rural areas
- Urban development, including canal estates, expanding throughout the lower catchment, with the possibility of disturbance to acid sulphate soils
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| | | Freshwater results |
| | | | B- | | Pimpama/Coomera Catchment * |
| | | - Streams generally in very good condition.
- Substantial improvements in Ecosystem Processes and Aquatic Macroinvertebrates, slight improvement in the Physical/Chemical indicator.
- Declines in the Nutrient Cycling and Fish indicators.
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| | | Estuarine results |
| | | | C+ | | Pimpama Estuary |
| | | - Increases in phytoplankton abundance, nutrient and turbidity levels, particularly in the lower reaches of the estuary.
- Slight improvements in dissolved oxygen concentrations and biological health rating (nutrient mixing plots).
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| | | B | | Coomera Estuary |
| | | - Grade decrease due to increases in phytoplankton abundance and nutrient levels, particularly through January-February 2009.
- Salinity throughout estuary lowest since 2001, indicative of high freshwater inputs.
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