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#2
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Question about wave action on inland lake.
In article ,
says... Hi, I have a boat on Lake Lanier in GA. The other morning I took it out, and the overall wave action appeared to be different than usual. It was a flat calm day, except when a passing boat produced some waves. Most of the time the waves seem to be sort of peaked and a bit sharp, but on this morning they were more rounded and flatter. The first boat I noticed it from, I thought it might be simply due to the shape of the boat itself. But after a while I noticed it was true of all of them...which was cool with me because it meant I could go faster without getting tossed in the air too much. It still made me wonder *why* though. Could it have something to do with what creates high and low tides, and/or why sometimes when you dig a hole you seem to have more dirt than you took out and sometimes you seem to have less? If so, is there a way to predict when waves will tend to be sharper and when they will tend to be flatter, like people can predict high and low tides? I suspect that some of the differences in wave characteristics you observe might be due to a very strong and shallow thermocline in the lake. That might act as an artificially shallow 'bottom' for the waves, changing their character. At this time of the year, the lake is probably not too stratified, and the real depth controls the waves. Later in the summer, it may be very stratified, with a sharp thermocline at 6 to 15 feet. (I've discovered those when diving into apparently warm lakes!). Another phenomenon which probably doesn't have much to do with your observations is sieching. It is well described at http://www.glcclub.com/lifeline/03mar/seiches.htm Small lakes don't usually have tides---but they can have seiches, which can show some of the same characteristics. Whether it has anything to do with the amount of dirt in holes, who knows. That phenomenon has to do with relative compaction---a lesson I learned as an enginering student trainee with the California Dept. of Transportation many decades ago. Mark Borgerson |
#3
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Question about wave action on inland lake.
Could it be...
+ There was something in the water, like more weads or growth, that kept the waves from building? + There was oil on the water. I've heard that even a thin layer of oil will effect wave action. + That normally, but not this day, there is some wind that catches even little waves and makes them a little more pronounced? + That normally, but not this day, there are lots of other waves from either wind or boats that cause interference with all the waves and make them all more pronounced? Just guessing around. |
#4
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Question about wave action on inland lake.
My guess is air temperature and pressure, and the water temperature.
Course, it could have been an oil slick too, or some other chemicals doing the same thing. Greg Luckett wrote in message ... Hi, I have a boat on Lake Lanier in GA. The other morning I took it out, and the overall wave action appeared to be different than usual. It was a flat calm day, except when a passing boat produced some waves. Most of the time the waves seem to be sort of peaked and a bit sharp, but on this morning they were more rounded and flatter. The first boat I noticed it from, I thought it might be simply due to the shape of the boat itself. But after a while I noticed it was true of all of them...which was cool with me because it meant I could go faster without getting tossed in the air too much. It still made me wonder *why* though. Could it have something to do with what creates high and low tides, and/or why sometimes when you dig a hole you seem to have more dirt than you took out and sometimes you seem to have less? If so, is there a way to predict when waves will tend to be sharper and when they will tend to be flatter, like people can predict high and low tides? -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#6
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Question about wave action on inland lake.
My guess is air temperature and pressure, and the water temperature.
Course, it could have been an oil slick too, or some other chemicals doing the same thing. Greg Luckett wrote in message ... Hi, I have a boat on Lake Lanier in GA. The other morning I took it out, and the overall wave action appeared to be different than usual. It was a flat calm day, except when a passing boat produced some waves. Most of the time the waves seem to be sort of peaked and a bit sharp, but on this morning they were more rounded and flatter. The first boat I noticed it from, I thought it might be simply due to the shape of the boat itself. But after a while I noticed it was true of all of them...which was cool with me because it meant I could go faster without getting tossed in the air too much. It still made me wonder *why* though. Could it have something to do with what creates high and low tides, and/or why sometimes when you dig a hole you seem to have more dirt than you took out and sometimes you seem to have less? If so, is there a way to predict when waves will tend to be sharper and when they will tend to be flatter, like people can predict high and low tides? -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#7
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Question about wave action on inland lake.
There's a treatment of this subject in 'The American Practical Navigator'
('Bowditch'). Wave height and period are a function of wind strength and the time and distance that the wind has had to build them up. If the fetch is across a large body of water, waves will be higher. If the wind has only recently risen, the waves will be flatter. Rain smooths small waves further. Icing smooths things, too. If there's been a large wind shift, waves will be irregular. Shallow water makes makes waves shorter and steeper. wrote: Hi, I have a boat on Lake Lanier in GA. The other morning I took it out, and the overall wave action appeared to be different than usual. It was a flat calm day, except when a passing boat produced some waves. Most of the time the waves seem to be sort of peaked and a bit sharp, but on this morning they were more rounded and flatter. The first boat I noticed it from, I thought it might be simply due to the shape of the boat itself. But after a while I noticed it was true of all of them...which was cool with me because it meant I could go faster without getting tossed in the air too much. It still made me wonder *why* though. Could it have something to do with what creates high and low tides, and/or why sometimes when you dig a hole you seem to have more dirt than you took out and sometimes you seem to have less? If so, is there a way to predict when waves will tend to be sharper and when they will tend to be flatter, like people can predict high and low tides? |
#8
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Question about wave action on inland lake.
There's a treatment of this subject in 'The American Practical Navigator'
('Bowditch'). Wave height and period are a function of wind strength and the time and distance that the wind has had to build them up. If the fetch is across a large body of water, waves will be higher. If the wind has only recently risen, the waves will be flatter. Rain smooths small waves further. Icing smooths things, too. If there's been a large wind shift, waves will be irregular. Shallow water makes makes waves shorter and steeper. wrote: Hi, I have a boat on Lake Lanier in GA. The other morning I took it out, and the overall wave action appeared to be different than usual. It was a flat calm day, except when a passing boat produced some waves. Most of the time the waves seem to be sort of peaked and a bit sharp, but on this morning they were more rounded and flatter. The first boat I noticed it from, I thought it might be simply due to the shape of the boat itself. But after a while I noticed it was true of all of them...which was cool with me because it meant I could go faster without getting tossed in the air too much. It still made me wonder *why* though. Could it have something to do with what creates high and low tides, and/or why sometimes when you dig a hole you seem to have more dirt than you took out and sometimes you seem to have less? If so, is there a way to predict when waves will tend to be sharper and when they will tend to be flatter, like people can predict high and low tides? |
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