Cockburn groundwater area water management plan
Plan release information
The Cockburn groundwater area management plan was released in December 2007.
The Cockburn groundwater area water management plan: evaluation statement 2007-2011 reported on the first four years of implementation.
The Cockburn groundwater area water management plan: evaluation statement 2012-2015 summarises how we continued to implement the plan up to now.
Water allocation planning in the Cockburn area
Planning is essential to make sure that our water supplies are secure for future generations and the needs of the community and the environment are protected.
The 2007 Cockburn plan was suitable for managing groundwater allocation in this area to date. However, we now need to adapt our management approach to:
- account for the continuing effects of the drying climate on groundwater availability
- minimise the effects of groundwater abstraction on environmental assets under the drying climate
- minimise movement of the seawater interface further inland.
We are now in the process of developing the next groundwater allocation plan for Cockburn. We will release the new plan for public comment and a report outlining the method we used to update the allocation limits in 2017. These will explain why the amount of water available for licensing from the Superficial aquifer was reduced and the decisions we made to balance the competing needs for water under a drier climate.
Existing supply options, including groundwater, are already nearing full capacity. Alternative water supply options to support industrial expansion were investigated by the department through the Western Trade Coast heavy industry local water supply strategy project.
The new allocation plan will include more precise water management objectives. It will also outline what actions we will take to achieve them. The plan will include a monitoring program that uses new and existing infrastructure to assess the resource’s response to management.
Stakeholder engagement is an integral part of this process and we will continue to keep key groups and individuals informed of our work on the replacement plan. If you would like to receive updates on the next Cockburn groundwater allocation plan, please register your interest by emailing: firstname.lastname@example.org
The plan area covers the Cockburn groundwater area, which is about 157 km² and located 30 km south of Perth. It extends 22 km along the coast on the Swan Coastal Plain from Kwinana Beach northward to South Beach, and extends about seven kilometres inland.
The plan area is located in the local government areas of City of Kwinana, City of Cockburn and City of Rockingham. Kwinana and Cockburn are the largest population centres in the plan area.
Cockburn groundwater is found in both confined and unconfined aquifers, which are the Superficial, Rockingham Sand (where present), Leederville and Yarragadee aquifers.
For management purposes, the Cockburn groundwater area is divided into four subareas – Kogalup, Thompsons, Valley and Wellard.
Cockburn groundwater plan area and subareas