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#624681 - 09/28/10 02:09 PM A tide and current question
JPbarbless Juvenile at Sea Registered: 03/03/07 Posts: 171 Loc: Seattle	Way back I remember a rule in regard to how tidal current flows. It went something like this rule of 12 1-12 2-12 3-12 3-12 2-12 1-12 meaning at the start of flow 1-12 of current flows the 2-12 flows ect. I was trying to explain this to a friend but could not exactly remember how it worked. I have looked in my old piloting books and all over and cannot find any information on the subject. If anyone can help me , This would be one less thing that I have to write off to early onset alztimers. Not really but the way my memory works now days it is real scarey. Thanks okbye JP
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#624722 - 09/28/10 03:17 PM Re: A tide and current question [Re: JPbarbless]
Irie River Nutrients Registered: 11/26/06 Posts: 4317 Loc: South Sound	A lot would depend on the width and depth of the body of water.
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#624739 - 09/28/10 03:54 PM Re: A tide and current question [Re: Irie]
goharley River Nutrients Registered: 03/27/02 Posts: 3188 Loc: U.S. Army	From Salmon University: Quote: There is a formula that is used to calculate the amount of flow of a river at a bar. It is called the "rule of 12". This flow will be best described as: For each hour after the tide change the flow will be: 1st hour will be 1/12th 2nd hour will be 2/12ths 3rd hour will be 3/12ths 4th hour will be 3/12ths 5th hour will be 2/12ths 6th hour will be 1/12th From this table you can see that the maximum flow will be the middle 2 hours of an exchange. This equates to the bar being roughest at that time. Wind conditions on any tide, will extend these times. All else taken into consideration, the bar usually tends to not be as rough on the incoming tide. _________________________ Tent makers for Christie, 2016.
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#624750 - 09/28/10 04:33 PM Re: A tide and current question [Re: goharley]
JPbarbless Juvenile at Sea Registered: 03/03/07 Posts: 171 Loc: Seattle	Thank you for your reply. My memory is not as bad as I thought. I love the wealth of information that is available from the people on this site. I hope to meet some of you in the future. FISH ON okbye
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