The Illabarook Salinity Province is a middle sized Corangamite province having local-intermediate scale Groundwater Flow Systems (GFSs) in deeply weathered, fractured Palaeozoic rocks with some local scale GFSs found in an overlying veneer of sedimentary gravel caps on bedrock hills.
Mapped salinity occurrence is mainly confined to drainage lines and depressions where increased groundwater recharge has resulted in discharge along creeks and valley floors. In the Cape Clear area, significant soil erosion has resulted along some drainage lines.
Management of high watertable areas and saline soils needs to ensure suitable waterlogging and salt tolerant plants are protected from stock damage. In the Mount Mercer area, extensive forestry development around some formerly mapped saline areas is likely to have significantly reduced the salinity hazard in recent years.
|