Upper Nepean River Subcatchment
The Upper Nepean River subcatchment contains four large water supply reservoirs including Nepean, Avon, Cordeaux and Cataract Lakes.
These reservoirs are part of the drinking water supply for metropolitan Sydney. The rivers associated with these dams/lakes (the Nepean, Avon, Cordeaux and Cataract rivers) are the major rivers of this subcatchment.
Most of the land within this subcatchment falls within the Special Areas of the Sydney Catchment Authority, thus restricting the land use in the subcatchment. Over 50% of the subcatchment is native forest, yet there are small areas of agriculture (beef and dairy cattle) and rural-residential development in the headwaters of the Upper Nepean River and the lower reaches of the Upper Nepean and Cataract Rivers. The lower reach of the Cataract River, has been severely impacted by cracking of the river bed caused by subsidence associated with long wall mining activities. |
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