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NSW Flood Data Portal

Floodplain Risk Management Study and Plan

Botany Bay and Foreshore Beach Floodplain Risk Management Study and Plan

The Botany Bay and Foreshore Beach Catchment is located within the Bayside Council local government area, and includes parts of the suburbs of Botany, Pagewood and Banksmeadow. The catchment is situated at low elevations with flat relief. Flooding in the catchment occurs as a result of runoff collecting within low points on the ground surface, with drainage of these locations being impeded by a constrained stormwater drainage system. The poor drainage conditions are exacerbated by the low ground elevations and the influence of elevated ocean levels, coinciding with rainfall events, in Botany Bay to which the catchment drains. The low elevation of parts of the catchment mean that areas are also susceptible to tidal inundation during dry weather conditions and high tide and elevated ocean level events such as storm surge, in addition to future sea level rise.

Key objectives of this study are to: • Update available hydrologic and hydraulic modelling to estimate flooding conditions for a range of design events based on current flooding analysis guidelines. • Identify and assess structural and non-structural mitigation measures to manage flood risk. • Review existing planning, policy and emergency management for gaps and inconsistencies relating to floodplain planning, then develop proposed amendments to address residual flood risk. • Prioritise the works and measures, including economic and multi criteria appraisal of options. • Develop an implementation program for recommended works and measures including timing, responsibility and sources of funding. • Conduct consultation with the community and key stakeholders throughout the study to obtain information and intelligence for input into the study. Gauge the perceptions of the community on flooding matters. Obtain feedback on the findings and recommendations of the study.

Additional Information

Field Value
Title Botany Bay and Foreshore Beach Floodplain Risk Management Study and Plan
Publication Date 12 March 2021
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Bayside Council
Author/ Prepared by Jacobs Pty Ltd
Publish date 11 March 2021
Update date 15 March 2021
River Basin 213 - Sydney Coast and Georges River
Place Name Botany
Approval State Approved
Submitted for approval 15 March 2021
Submitted by Pulak Saha
Approved 18 March 2021
Approved by ses-sysadmin
Identifier eafd72ce-03c6-4dfc-9168-bd1d6b755feb