Coddy Posted January 25, 2006 Report Share Posted January 25, 2006 Hi all Found this site which is quite interesting. Hopefully the web page I have posted shows what the tide was expected to do and what actualy happened last Sunday. Tide Info Explains why we all ran out of water! Seems a good site Coddy Quote Link to comment Share on other sites More sharing options...
Swainiac Posted January 25, 2006 Report Share Posted January 25, 2006 Big differential there Dave, simple annomolie, or something more sinister??# Rich Quote Link to comment Share on other sites More sharing options...
jack Posted January 25, 2006 Report Share Posted January 25, 2006 BOUND to be Global Warming.!! jack Quote Link to comment Share on other sites More sharing options...
Paul D Posted January 25, 2006 Report Share Posted January 25, 2006 The theory here ( at work ) is the high pressure over the weekend had something to do with it. - Sounds plausible to me. Quote Link to comment Share on other sites More sharing options...
Paul D Posted January 25, 2006 Report Share Posted January 25, 2006 and indeed is ..... Pressure effects on tide This weekend press was around 1035 which gives approx 1ft less of water. Quote Link to comment Share on other sites More sharing options...
alun j. Posted January 25, 2006 Report Share Posted January 25, 2006 my hypothesis adds in the seasonal variation....... walking along Southbourne beach last Sun., I saw the level of the beach and the markers being used to restore sand levels back near the top of the prom. There's been a huge loss of sand from the beaches, hence the dredgers and pumps. I noticed that there was a similar loss of sand off the Bar, down to hard , compact gravel. At low water this means the river water just spills in all directions, ie. a large area of shallows with no pronounce channel. Even without the long-term pattern of sand removal by currents, there is a seasonal pattern caused by the different wave energies of Summer / Winter; the smaller 'Summer waves' are constructive and push sand up onto the beaches [ winter ones are destructive]. With more sand on the Bar, the water is held back more in the Run, which then cuts through making a channel ; faster but deeper water. Alun Quote Link to comment Share on other sites More sharing options...
Afishionado Posted January 25, 2006 Report Share Posted January 25, 2006 and indeed is ..... Pressure effects on tide This weekend press was around 1035 which gives approx 1ft less of water. I thought we all knew the affect of air pressure on tide flow and hight, it's been mentioned a few times. If not, is there a subject here for a bit of a teach in one Thursday. The other thing I've mentioned a few times is that there is nothing in the tables to say they are going to be 100% accurate, in fact they are called Tidal Predictions rather than certainties. Going out from a port (Poole) that has water all the time makes one a bit blase, I remember the short time I lived on Hayling Island I couldn't get used to the normal cycle of tides and was caught out several times. Mad Mike Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.