The Knowsley Salinity Province is a small province with a number of relatively small areas of mapped salt affected land. The underlying hydrogeology consists of local scale Groundwater Flow Systems in fractured and weathered meta-sedimentary Palaeozoic rocks and Permian glacial sediments (Tillites). Dryland salinity has developed along drainage lines associated with deep erosional gullies within the poor soil development of the undulating Tillite hills, including a number of watercourses that drain into the Campaspe River and Lake Eppalock. A transect of bores monitoring groundwater levels at two main discharge sites have shown the groundwater level has remained high even through the 10 years of drought between 1999 and 2009.
Discharge areas have mostly been successfully revegetated with Tall Wheat Grass, Phalaris and small groves of Salt Bush. Some significant upslope tree planting has also been completed on the rocky ridges in an attempt to control recharge.
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