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On 01/04/2011 17:47, <a class="moz-txt-link-abbreviated" href="mailto:john@jfeldredge.com">john@jfeldredge.com</a> wrote:
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cite="mid:560250781-1301672833-cardhu_decombobulator_blackberry.rim.net-1730247852-@bda2463.bisx.prod.on.blackberry"
type="cite">
<pre wrap="">One example of a waterway with reversing flow would be the estuary of a river. While the tide is rising, the flow in the estuary may slow, come to a standstill, or even temporarily reverse directions (called a tidal bore).
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Surely most estuaries reverse direction with an incoming tide,
especially close to the sea?<br>
<br>
A tidal bore is a specific phenomenon (a step change in the water
depth, moving upstream), and is not simply a reversal of direction:<a
href="http://en.wikipedia.org/wiki/Tidal_bore">
http://en.wikipedia.org/wiki/Tidal_bore</a><br>
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