Madison Blue???

So does this mean that the rains up north are recharging the aquifer via rising river levels or simple some river water is siphoning into the aquifer in isolated spots? What does history tell us about past situations like this?

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Originally Posted by T. Bix

What does history tell us about past situations like this?

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"First to go, last to blow" refers to how Madison Blue has such a short spring run that when the river rises, the spring pool's hydrostatic pressure increases, turning the flow into a siphon. It's usually the first NFl spring to lose its vis, and the last one to clear.

Went there yesterday and elected not to dive the basin since you could not see the bottom. Went in at Martz the it was cloudy until we got into the main tunnel headed upstream. Downstream was low vis. Would not recommend the front end right now.

Based on the size of the waterfall the spring run had become, it would be hard to believe Madison is a siphon ATM. More likely because of the rise in the river, and the low hydro-static pressure of the system at this time, there is probably a ton of tannic seepage (which happens at Madison anyways).

There are certain placed that need to get rainfall for certain spring to get fed. Someone mentioned the Okefenokee swamp for the Luraville/Mayo/Branford area. They were not real sure about the location though.

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Originally Posted by Greenwood_60

Based on the size of the waterfall the spring run had become, it would be hard to believe Madison is a siphon ATM. More likely because of the rise in the river, and the low hydro-static pressure of the system at this time, there is probably a ton of tannic seepage (which happens at Madison anyways).

There are certain placed that need to get rainfall for certain spring to get fed. Someone mentioned the Okefenokee swamp for the Luraville/Mayo/Branford area. They were not real sure about the location though.

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Rain in the Okefenokee swamp makes tannic water in the river, and causes the river to rise. Good for the water supply, but not for visibility in the springs :(

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Originally Posted by Greenwood_60

Based on the size of the waterfall the spring run had become, it would be hard to believe Madison is a siphon ATM. More likely because of the rise in the river, and the low hydro-static pressure of the system at this time, there is probably a ton of tannic seepage (which happens at Madison anyways).

There are certain placed that need to get rainfall for certain spring to get fed. Someone mentioned the Okefenokee swamp for the Luraville/Mayo/Branford area. They were not real sure about the location though.

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Have you ever kept an eye on the river level guages? A good storm will increase the river level by several feet in a day, pretty easily.

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Originally Posted by SuPrBuGmAn

Have you ever kept an eye on the river level guages? A good storm will increase the river level by several feet in a day, pretty easily.

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Nope. Never been near them at the right time. I would have required (I am estimating) a 2-4 feet rise in the river lever to match the water level coming out of Madison.

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Originally Posted by Greenwood_60

Nope. Never been near them at the right time. I would have required (I am estimating) a 2-4 feet rise in the river lever to match the water level coming out of Madison.

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You don't need to be near them. It's online:

http://waterdata.usgs.gov/fl/nwis/dv...cd=00060,00065