The earthen weir, designed by Dan Anderson from Nature Glenelg Trust and constructed by local earthworks contractors (Farmers Field Service), was installed within an existing drainage channel on the property on Wednesday 19th June 2013. The weir structure has been designed to enable the re-hydration of a 2.4 ha wetland site by restricting the drainage outflow elevation by up to 80 cm within the existing drainage channel, thereby increasing the depth and duration of seasonal inundation. In the right situations, where adjustable water level regulation is not required, earthen weirs can provide a cost-effective wetland restoration solution.
The reinstatement of hydrological (water) regimes is an integral component of restoring wetland systems.
Additional imagery from this site has now been provided to show the impact of winter rains at the site – see below.
This Case Study is the first in a series to illustrate wetland restoration in practice, delivered through Nature Glenelg Trust’s Wetland Restoration Program on Private Land and funded by the Australian Government.