The Wimmera–Mallee wetlands include 51 wetlands on public and private land spread across the dry north-west area of Victoria. Historically, the wetlands received water from the open channel system before the Wimmera–Mallee pipeline was completed. As part of the pipeline project, all stock and domestic supply dams were replaced with tanks and the open channel distribution system was replaced by pipeline. The project achieved significant water savings for environmental watering of the area's flow-stressed rivers, creeks and waterways and created regional development opportunities; but it also substantially reduced the open water in the formerly channel-supplied areas.
To mitigate the loss of open water in the landscape, a 1,000 ML environmental entitlement was created to supply to wetlands (some with associated dams) that were previously supplied through the old channel system; the entitlement is supplied via the Wimmera–Mallee pipeline system. A project was completed to identify priority wetlands to be connected to the pipeline system, and all 51 wetlands are now connected to the pipeline.