The water high in the St. Johns river
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The water high in the St. Johns river
Not to be a smart alec, but the St. Johns River is a long river. There are many gauges along the river to monitor the levels.Quote:
Originally Posted by hobo
This website: https://water.weather.gov/ahps2/hydr...rce=hydrograph
will show the levels along the river.
You will have to scroll down to where it shows a map, click on the link for downstream or up stream gauge. If you click to zoom in or out you can see all of the gauges along the river. Click on the dot for the gauge that you are interested in, and you will find current levels and predicted levels.
Hope this answers your question.
Water got too high so they drown....
Sent from my SM-G950U using Crappie.com Fishing mobile app
Danny,Quote:
Originally Posted by Phantom309
Google up my fwc.com .......how do hurricanes kill fish
did you see the graph of the o2 levels in flycaster's earlier post
OK, this was what I was looking for --->Quote:
Originally Posted by Crappieday
Low dissolved oxygen
Low dissolved oxygen is by far the most common cause of post-storm fish kills. When oxygen levels get too low, fish are unable to obtain the required amount of oxygen necessary for metabolism. Several factors may occur in concert to cause this condition:
- Wind-In small lakes or ponds, wind action may push surface waters to one side of the lake. Water from the bottom comes to the surface to fill the space the surface water used to occupy, bringing with it sediments and organic materials from the bottom. This water from the bottom is naturally low in oxygen. The bottom materials may include hydrogen sulfide; in high enough concentrations, hydrogen sulfide can be lethal to fish and is responsible for any "rotten egg" or "sewage" odors. Bacteria in the sediments are also brought to the surface; these bacteria decompose the organic material from the bottom, using up oxygen in the process. This whole event is termed a "turnover," since literally, the bottom comes to the top.
- Long periods of cloudy days-In aquatic ecosystems, the oxygen manufacturing system consists of microscopic organisms and aquatic plants that carry out photosynthesis: using energy from sunlight to create carbon-based nutrition for themselves with oxygen as a by-product. When there are long periods of cloudy days, these organisms produce less oxygen. At night, photosynthesis doesn't occur at all, and these same oxygen-producers are actually using up oxygen during respiration, just like fish and other animals. Under these conditions, it does not take long before there is little oxygen left for fish. Low-dissolved-oxygen fish kills often occur early in the morning, when oxygen levels are at their lowest.
Thanks Danny. I was curious but too lazy (and busy still cleaning up after Irma) to look through all those details. Clouds and bottom waters, that's very interesting info.
Some good pics Danny....don't think I've ever seen that slow wake sign outside of the Jolly Gator under water...a lot of dangerous stuff under water now, the bridge over lake Jessup lost (15-20) 30 ft. high street lights sheered off a ft. from base that I'm sure some ended up in the lake, that being said the start of the speck bite is sure to be delayed this year, goin to take some time before things settle down, then it's going to take some recon to find them! Back to the salt I guess......
Lack of O2 is result of dead stuff that is now decaying. If you've ever owned an aquarium, you'll know the following.
decaying stuff is putting in more nitrites (highly toxic to fish and kills them fast) faster than the amount of bacteria can break it down into nitrates
nitrates levels (kills fish to a lesser extent) are not yet enough to support the entire ecosystem
plants feed on the nitrates, break it down and filter the water and create the O2 needed for the water, and we have more plants underwater that arent supposed to be.
Or something along those lines.
Basically aside from all the crap we put in the water from runoff, and accidental sewage release, this thing basically reset the entire ecosystem of the river.
It's like taking a 10gal aquarium at full capacity and running well and adding 5gal more without first making sure the whole system is capable of it. Unfortunately, stuff will die off while it corrects itself, which it will, but takes time.