About the Study

Central Coast Council is currently undertaking a Floodplain Risk Management Study and Plan (FRMS&P) for the Northern Lakes. Under the NSW Government's Flood Prone Land Policy (2005), Council has a responsibility for floodplain risk management. This project was supported by the NSW Government's Floodplain Management Program. Council has engaged a consultant, NSW Government's Manly Hydraulics Laboratory to carry out the work.

The Northern Lakes catchments are located on the Central Coast of New South Wales and occupy a combined area of 33.5 km2. The study area comprises a number of suburbs that surround the inter-connected Lake Munmorah, Budgewoi Lake and Tuggerah Lake; namely Wyongah, Gorokan, Lake Haven, Charmhaven, San Remo, Buff Point, Budgewoi, Halekulani, Lake Munmorah, Noraville, Toukley and Norah Head. The study area is comprised largely of residential development, with regions of commercial, light industrial, open space and bushland occurring in smaller amounts throughout the area. The downstream areas of the catchment are impacted by flooding from Tuggerah Lakes.

There have been various hydrologic and hydraulic studies undertaken for the Northern Lakes catchments. The most recent was the Northern Lakes Flood Study (Cardno, 2015). This flood study documents flood behaviour across the catchment for a range of design floods for existing topographic and development conditions.

The objective of this project is to undertake a Floodplain Risk Management Study and to develop a Floodplain Risk Management Plan for the Northern Lakes catchment.