The small Navarre Salinity Province forms part of the headwaters of the Wimmera River catchment and has two distinct salinity discharge sites: Greens Creek and Frenchman’s Creek. Each contributes a high salt load to the upper valley river system.
Weathered fractured rock dominates the landscape, with rocky ridges outcropping with a north-south trend corresponding to the uplifted bedding plane. These ridges form high recharge areas, which supply the local scale Groundwater Flow Systems that underlie the province. At the eastern side of the province, the ridges slope westward onto an upland alluvial plain. At Frenchman’s Creek, salinity is expressed as small ‘break-of-slope’ and drainage line discharge, coupled with deep erosional gullies. At Greens Creek, salinity is mainly confined to the low-lying drainage basin, a wetland reserve.
Some salinity mitigation work has been undertaken with trees and tall wheat grass established at both sites.
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