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Cascading Rock Gully Control StructuresA series of large rock structures have been constructed in the bed of a large eroding dry creek. Rock has been sourced from nearby paddocks using a Schulte High Rise rock picker. The rock is a naturally occurring resource on farm and the structures, whilst very robust, are able to be added to or modified if required. The basic idea is that the top height of each structure will back water to the base of the structure upstream. Each structure is no more than about a metre in height. The rock weirs are ‘leaky’ structures that slowly release the water back into the creek system. Already the creek bed has been transformed from a dry ‘Gutter’ to a moist environment with the flourishing vegetation now trapping any sediment that is present. Pools of water are common and ideal for a reedy aquatic environment. All of these structures were constructed at a fraction of the cost of a single concrete flume and have much less embodied energy. THE BASIC PRINCIPLE
Groin and pin river control structures made from hardwood sourced on farm.These structures are made from hardwood logs sourced on farm. Logs are secured both in the bank and the stream bed. Other logs are used as pins and embedded into the creek bed to prevent the structure from being swept away. The whole structure has a low profile in the stream. These structures are again created from a natural resource on farm. Controlling stock access to the stream bed will also encourage revegetation which in turn reduces the destructive energy from a flow event. THE BASIC PRINCIPLE
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