EWRs for Southwest Rivers
The DoW were required to develop water resource management plans for a number of river systems in southwest Western Australia.
In line with protecting ecologically important downstream ecosystems, the DoW commissioned WRM to assist in determining the EWRs of the Margaret River, Brunswick River, Capel River, Wilyabrup Brook, Cowaramup Brook, Chapman Brook and Lefroy Brook. This involved undertaking aquatic fauna surveys to get an understanding of the ecological values that need to be protected by the EWR, and using Hec-Ras and RAP hydraulic models to determine minimum flows required to meet flow objectives for the maintenance of these values.
This work was undertaken in collaboration with ecologists and hydrologists from DoW.