Emu Drain erosion control and revegetation

Project (year): 

Emu Drain erosion control and revegetation (2020)

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Client:

Great Northern Connect (GNC) JV (Laing O'Rourke Australia Construction Pty Ltd and BGC Contracting Pty Ltd) 

 

Description:

GHEMS’ scope of works on the landmark NorthLink WA Stage 2 project has been extended to include erosion control and revegetation works of the environmentally important Emu Swamp Main Drain (Emu Drain). 

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In order to control erosion and stabilise the drain’s embankments, GHEMS applied a revegetation hydromulch mix consisting of ProGanics and Flexterra. The hydromulch was installed in a two-stage process, consisting first of ProGanics with a cover crop seed and native seed mix, followed by the Flexterra applied over the ProGanics.  

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While hydromulch performs a function similar to coir matting/erosion control blankets, additional advantages provided by the hydromulch products utilised include: 

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• ProGanics – primarily functions as a topsoil amerliorant / alternative growth media to aid seed germination and vegetation establishment

• Flexterra – primarily functions as a ‘flexible growth media’, to enhance erosion control effectiveness and surface stabilisation   

Only one week after hydromulch was installed, cover crop seed had germinated, showing signs of good vigour and growth.