13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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Wallis Lake Estuary Management Plan M.7 Management Area D, E Management Objective Reduce the impacts of stock in the riparian zone Action No M.7.1 M.7.2 M.7.3 Action Encourage and facilitate sustainable stock management practices in riparian zones Evaluate the findings of the Crown Land assessment at Wallis Lake and the Wallamba River Consider the complete removal of stock from riparian zones in the foreshore Crown Reserve pending the results from M.7.2 Indicative Cost Priority Responsibilities Progress Staff time Immediate (B2) Lands, GLC, DIPNR Staff time Immediate (B2) Lands, GLC, DIPNR TBD Immediate (B2) Lands, GLC, DIPNR Comments Fencing and providing alternative shade, as well as promoting revegetation/regeneration of riverbanks with native indigenous trees, shrubs and grasses can reduce the impact of stock in the riparian zone. By then employing a controlled ‘pulse grazing’ technique, weeds can be effectively controlled. The impacts of stock permanently grazing in the riparian zone can be severe and through grazing and trampling can: • deplete the banks of reinforcing vegetation making banks more prone to erosion • prevent young vegetation from growing • directly expose bank material to erosion • compact soil reducing infiltration, root growth and overall plant production • diminish the overall diversity of plant species and provide more favourable conditions for weeds, and • contribute excessive nutrients to waterways by concentrating nutrients derived from cattle dung. [Lower Wallamba River rivercare plan] The Department of Lands is currently conducting a comprehensive Crown Lands assessment. This review could see the development of terms and conditions attached to permits and leases to ensure the protection of ecologically significant riparian areas. It is recommended that based on the results of this assessment, the complete removal of stock from these areas in the foreshore Crown Reserve * be considered. Implementation of the Lower Wallamba River rivercare plan (action M.6.1) will also aid considerably in achieving this management objective. * Crown Reserve extends approximately 30 m around the foreshore of the Wallis Lake estuary 74
Wallis Lake Estuary Management Plan [Plate 4.19: Erosion on the Wallamba River exacerbated by stock permanently grazing in the riparian zone] 75
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