, c ic h end of the Strait. Lcl us now 



|opl i an.i see a oi her dhserved 



phenomena also suppott it. It should 

 h ,|| mv from the Ihcorv that HI the 



,,„„,„«•* to 9<as .s>,v(7 the differ- 



0 „ a . mi height between high and low 

 j u ! C s shoiiM be smaller than locali- 

 llCN mi R^S* s,r ai< 'emote from the 

 entrances The I ide Tables do not 

 "contain sullieient information on 

 which to base a judgement To the 

 extent that the stationary wave may 

 hc somewhat lemoved from the 

 •perfect" condition, the dillercnees 

 between high and low tides at the 

 cntranees may have only superficial 

 Mgnifkanee. 



I roffl ilie theory the nodes of the 

 siaiionarv wave should occur ai the 

 ■entrances" lo Bass Strait. It must 

 nut huwe\er be assumed the posi- 

 , llMIS of ihe nodes lie along the lines 

 C\,,. c Otw.tv-k.ng Is. -II timer group 

 ,nd Wilson s promontory- Flinders Is. 

 Swan Is. Fip 2 outlines Ihe geography 

 ol ».,ss Strail ami these two lines 

 Jefine the geographical entrances. It 

 ftema mote likely that the nodes of 

 the sialionaiy wa%c lie further to the 

 .seaward of these two lines. It is not 

 the coastlines that define the inter- 

 ference between the two tide waves 



»'croftiA 



^vPcrt Phillip 



S>^J /-^We-iotrpott / 



CQ-wcy ^^>o- 



Prom. 



•A K«c|l S . BA5 & /T^ 



U snSBfi V* 









-.2 as! \ (32! - j ] 



\ 



but rather the dimensions of slmlloss 

 water inside the continental shelf 

 (100 fm. line) and, of course, the 

 distance mound the abyssal plains. 



l)i\rin.\ion. 



If this theory is correct then it 

 suggests thai Ihe interchange of water 

 between Bass Strait and the ocean 

 outside may be severely restricted for 

 a large part of the year. This would 

 also mean that the water interchange 

 Irom Port Phillip and Western Pot! 

 Bays would also be very severely 

 restricted, a large percentage of the 

 water Onwiug mil would re-enter 

 these tv>o enclosed water bodies on 

 the next tide. Such an action would 

 |ia\ L - serums consequences u-hen con- 

 sidering pollution problems in these 

 two Bays and along the Bass Strait 

 coasts generally. 



1 would therefore like to urge that 

 some professional body take this 

 study up immediately, tt is essential 

 that work be started at once to 

 determine — 



the type, the quality and Ihe 

 i|iiarilitv ol mass flow of water 

 in md' out of Port Phillip and 

 Western Port Bays. 



W 1971 



