Subject: Why does the Indian Ocean at Perth have such a small tidal variation.

There is a great contrast in tides between here and,say, Broome further 
north, which experiences some of the largest tidal variations in the 
world. Our tidal variation is only about a metre. Nobody I have asked in 
this "neck of the woods" has been able to give me a meaningful 
explanation.Perhaps you are the guys (and gals) that can. An interesting 
question, don't you think? Thank you.   Terry Beahan  (A "sandgroper" ie. 
West Australian)
PS How did you like our opening ceremony (Olympics)

Re: Why does the Indian Ocean at Perth have such a small tidal variation.