636 SAND-MOVEMENT ON THE NEW SOUTH WALES COAST, 



Korogoro Point is perhaps as good an example of this curve as 

 any on the coast. It will be noticed that where the current is 

 deflected to the north, the form of the beach approximates more 

 to a flat, circular curve than to the hooked outline of the letter 

 Zeta, the curvature of course varying as the strength of the 

 current where the material acted upon is the same. 



The entrance to the Hastings River has been forced to the 

 south by the southerly current until the rocky headland on which 

 the historic town of Port Macquarie is built was met with. This 

 point does not extend far enough into the sea to cause a return 

 current to the north, and the circumstances are best illustrated 

 by fig. 2. Camden Haven entrance is formed in the same way. 



At Crowdy Head the shore-line bends away to the west, and 

 the current is impeded at this point and loses a good deal of its 

 force for at least 20 miles to the south. 



The current between Crowdy Head and Cape York is very 

 sluggish and uncertain, as the disposition of the Manning River 

 entrances will show. The engineering works carried out at the 

 Harrington entrance will probably prevent any serious impedi- 

 ment to the discharge of the flood-waters in the future, but 

 should a sudden stoppage of the river current unfortunately occur 

 at a time of high flood, a fresh opening to the sea would be 

 formed, and probably Farquhar Inlet be much enlarged. 



The current has not yet regained its normal direction and 

 velocity when Cape Hawke is reached, and the sand-movement is 

 not sufficient to close up such a comparatively insignificant stream 

 as the Cooloongolook River. 



The probable cause of the formation of the Wallis and Myall 

 Lakes a,nd the coast in the vicinity of Port Stephens has already 

 been referred to in this paper. This part of the coast will be of 

 greatest interest to the hydrographer in the future, when the 

 currents come to be investigated and the movements of beach- 

 material recorded. 



Just below Port Stephens the coast takes a sudden bend to the 

 west, and between Morna Point and Newcastle the trend is west- 

 south-west. This causes a deviation of the current, which swirls 



