The Lachlan catchment covers an area of approximately
84,700 km2 and has a population greater than 100,000 people producing 14% of
NSW agricultural production. The catchment encompasses 24 local government
The Lachlan Catchment is located in central western New
South Wales, flanked by the Macquarie and Bogan catchments to the north and
Darling to the west, Murrumbidgee to the south and the Sydney/Shoalhaven
Basin to the east.
The Lachlan River rises near gunning and terminates in
the great Cumbung Swamp near Oxley, 1450 river kilometres to the west. Major
tributaries of the Lachlan include the Abercrombie, Boorowa, Belubula and
Crookwell Rivers which join the
The Lachlan Catchment falls predominantly within the
Wiradjuri Aboriginal tribal area. The rivers were very important routes
providing food, water and shelter.
The main dam regulating flows in the Lachlan River is
Wyangala Dam, which has a capacity of 1,220,000 megalitres and is located at
the junction of the Lachlan and Abercrombie Rivers. The Belubula River is
regulated by Carcoar Dam, has a capacity 36,000 megalitres and located about
10 kilometres downstream of Blayney.
There are numerous weirs along the length of the Lachlan
River including, Nanami, Cottons, Jemalong, Booberoi, Lake Cargelligo, Lake
Brewster, Willandra, Gonowlia, Hillston, Whealbah, Torriganny and Booligal.
The geological formations throughout the catchment are
quite complex and have a significant impact on salinity. The soil types
throughout the catchment vary considerably ranging from very robust, durable
soils to very fragile soils, naturally acidic and sodic soils. This
variability requires effective management for erosion control, nutrient and