The following is an article written for the Yass Tribune by Kate Wilson, President of the Yass Landcare Group.
Yass Landcare Group members and friends participated in a hands-on field day on the property of Mike and Denise McKenzie on Sunday 22 September. It was a great opportunity to see the work that has recently been carried out on their property – the second part of a two phase project to counteract gully erosion.
The field day was led by project manager, Cam Wilson – a man with a mission to restore landscapes. Cam learned what he knows about landscape and water from working for two years with Peter Andrews, author of Back from the Brink, and Peter Marshall, who brings a scientific understanding of hydrology with effective practices.
Cam demonstrated how leaky weirs of various constructions can hold back the water in the landscape, rehydrating the surrounding land and allowing the water to slowly filter through the landscape. In big rain events, flood water is slowed and held suspended in such leaky weirs. This reduces erosion and prevents sediment from being carried down into the river.
Cam showed willing participants how to build fascines – bundles of logs tied together and placed in the gully. This technique is especially useful at the head wall of erosion and if carefully constructed, can stop erosion creeping back up through a paddock.
Some Landcare members also planted poplars under Cam’s direction, by simply digging a hole with a crowbar and plunging a cutting into the ground. The cuttings were taken from male trees which do not produce seed. Although they are not a native tree, they will grow up quickly and can be coppiced many times over, producing large quantities of material for use in leaky weirs. If lopped during a drought, the leaf is equivalent to Lucerne in feed value and the bark high in micronutrients.
Cam has also overseen the construction – or rather the resurrection – of a chain of ponds on the property. He has converted a wide valley floor, overrun with river tussock, into a series of ponds with the help of an excavator. He is planting native trees and shrubs, along with grasses, rushes and sedges to create a diverse wetland for biodiversity. The sound (and sight) of frogs was delightful. Mike and Denise hope the wetland will attract numerous bird species too.
The Gorgeous Gullies Project was funded through Landcare Australia by Leighton Holdings.
To learn more about Cam Wilson’s work, check out his website at www.earthintegral.com
If your Landcare group is interested in conducting a workshop on low cost erosion control strategies please contact Cam to discuss possibilities.
Disclaimer: Where water flow is concerned there are substantial risks involved. While the information and images we publish are formulated in good faith, with the intention of raising awareness of landscape rehydration processes, the contents do not take into account all the social, environmental and regulatory factors which need to be considered before putting that information into practice. Accordingly, no person should rely on anything contained within as a substitute for specific professional advice.
Images © Cam Wilson, Earth Integral, 2013