A project to stabilise sand movement and cliff erosion at Mount Martha North beach, on the Mornington Peninsula, is underway. Beach and cliff erosion occurs at Mount Martha North due to ongoing, natural processes.
Several actions have been taken to limit the adverse effects of erosion on Mount Martha North beach in the short to medium term, with the most recent being emergency works carried out between August and October 2018 to address immediate safety concerns.
DELWP commissioned a technical study in 2017 to help determine the best possible engineering solutions to stabilise sand loss from the beach area.To ensure that community values regarding Mount Martha North beach are considered in the study, we are now inviting beach users to complete a brief survey.
Mount Martha North beach is located on the eastern side of Port Phillip Bay and runs approximately 600 metres from the mouth of Balcombe Creek at the southern end, to a headland separating it from Hawker Beach, to the north.
Please refer to the map in the Document Library section on the right hand side of the screen for more details.
Sand loss at Mount Martha North beach is part of an ongoing natural process. Winter weather conditions generally move sand to the south, and summer weather moves some sand back to the north. Overall, there is a net loss of sand from Mount Martha North beach towards the Mount Martha South beach.Recognising that the coastal process of sand movement will always occur, the primary objectives for DELWP are to maintain public safety for the Mount Martha North beach and protect the natural assets and public infrastructure.
DELWP has engaged coastal engineering consultants Water Technology to carry out a multi-criteria analysis of four engineering options that were recommended in a 2017 coastal processes study, aimed at slowing sand loss from the beach.
The full coastal processes study may be viewed in the Document Library section on the right hand side of the screen.
The following criteria will be applied in assessing each engineering option:
- environmental (impacts and benefits)
- financial (life-cycle cost)
- upfront (construction) cost.
The multi-criteria analysis will score and rank each option, and up to two of the highest ranked options will then be modelled in detail. The modelling will develop and test the options to determine what scale, design and positioning would be required for the preferred engineering works to stabilise Mount Martha North beach. This modelling will inform the short and long-term management of Mount Martha North beach and cliff.
Consideration will also be given to safety and future adaptability of the solutions as the climate changes.Please refer to the timeline on the right-hand side of the screen for next steps regarding actions related to Mount Martha North beach.
Current protective works and planning at Mount Martha North beach
Alongside the multi-criteria analysis for engineering options to stabilise sand movement at the beach, DELWP is undertaking additional works and studies as follows:
- Emergency works to stabilise the eroding cliff-face through installation of an emergency rock revetment: completed October 2018
- Geotechnical monitoring of cliff movement and emergency revetment: installed December 2018
- Permanent revetment detailed design – completed November 2018: decision regarding installation pending monitoring results for emergency revetment
- Cultural Heritage Management Plan (CHMP): Underway. Delivery expected early 2019
How will survey information be used?
We will use survey results to assist in developing weightings that reflect community values, relating to the four options under consideration. In particular, the survey will influence the social and environmental criteria of the analysis. This is a qualitative survey, to give us a better understanding of community use of Mt Martha North beach - participants are not being asked to vote on specific options.
Tell us what you value at Mount Martha North beach
We want to understand what you value at Mount Martha North Beach to help us determine the best option to manage erosion and future beach use.
The following survey will take around 10 minutes to complete.
The Department of Environment, Land, Water and Planning (DELWP) is committed to protecting personal information provided by you in accordance with the principles of the Victorian privacy laws.
The information you provide will be used to help inform the Mount Martha North beach project, and to keep you updated on the project if you choose to provide contact details.
The information you provide will be made available to DELWP to help inform the future management of Mount Martha North beach only. Personal details (name/contact details) will not be made public.You may access the information you have provided to DELWP by contacting Cass Philippou at firstname.lastname@example.org.