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NSW Flood Data Portal

Flood study

Bega and Brogo Rivers Flood Study

The river systems associated with the Bega and Brogo River catchments converge at the township of Bega. They start in farmland areas on uphill slopes below an escarpment of the Great Dividing Range to the north and west of Bega, then flow through the township before flowing into the Tasman Sea at the Bega River mouth. The mouth is situated at Mogareeka some 2.5 km north of the village of Tathra and approximately 24 km downstream of Bega. The smaller villages of Candelo and Bemboka are upstream of Bega. The Bega River shares a confluence with the Bemboka River some 15 km upstream of Bega. The combined catchment area of the two river systems is approximately 1940 square kilometres at Mogareeka. The Bega River is the larger of the two rivers contributing a catchment area of some 1030 square kilometres at the confluence while the Brogo River contributes about 780square kilometres. The remaining catchment area contributes about 125square kilometres between the Bega/Brogo Rivers confluence and the ocean outlet. The overall catchment is dominated by rural landscapes consisting of farmland and forested areas.

The primary objective of the Bega and Brogo Rivers Flood Study was to develop hydrologic and hydraulic models for mainstream flooding within the modelling area (from upstream of Bega to the outlet at Mogareeka, and Candelo Creek at Candelo), and to provide information on flood depths and extents, water levels, flows and velocities for a range of design flood events, including 10%, 5%, 2%, 1%, 0.2% AEP and Probable Maximum Flood (PMF) events. Further objectives were to identify hydraulic and preliminary hazard categories for the six design flood events, and to provide preliminary Flood Planning Levels based on the 1% AEP event plus freeboard including consideration of catchment and ocean flooding using three cases in an envelope approach.

Additional Information

Field Value
Title Bega and Brogo Rivers Flood Study
River Basin 219 - Bega
Publication Date 6 June 2014
Themes Land and Resource Management
Spatial Extent
© OpenStreetMap contributors
Council/LGA Bega Valley Shire Council
Author/ Prepared by SMEC
Publish date 18 June 2019
Update date 26 June 2019
Approval State Approved
Submitted for approval 19 June 2019
Submitted by Akhil Sud
Approved 27 June 2019
Approved by jhudson
Identifier 7cf88dae-03d6-46ce-ad36-325bb07b058c