LONG NOSE POINT OUTFALL

Click the photograph for a enlarged view

Physical Environment

Landscape  

Long Nose Point consists of Wagonga bedrock which are made up of chert, conglomerate, agglomerate, slate, sandstone and phyllite (Ulladulla Geological Series Sheet S1 56-13). The shoreline within the general area is comprised of low cliffs and a relatively large wave cut tidal rock platform. To the south are Barlings Beach, ‘Barlings’ Island and Broulee Bay and to the north is a series of rocky outcrops extending to Burrewarra Point.

Bathymetry & Substrate

The outfall is located on the southern side of Long Nose Point. The pipe is cemented into the bedrock and small rocks have been placed in the concrete giving it a decorative appearance. The pipe itself discharges subtidally, approximately 3 m below water level.

Currents, Winds and Waves

Studies by Sinclair Knight & Partners (1984) prior to construction of the outfall indicate:

• the current movements were not especially influenced by either wind direction

• or tidal phase.

• the two days of moderate sea swell resulted in a current movement to the north-west, whilst two days of low swell resulted in a marked southerly drift.

• the north-westerly drift originated from a broad front at the shoreline and would be intercepted by Barlings Island and the connecting reef and diverted out into Broulee Bay.

• A southerly drift would result in a high degree of dilution across the broad mouth of Broulee Bay.

Outfall Site

Outfall Site

Long Nose Pt. 

(Long_1) Last updated June 2000