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minnesotatuff

How will the low water affect the ice heaves?

12 posts in this topic

ok, thinking down the road a few weeks or so... but, i was wondering if the ice and structure being closer this winter might make the ridges more or less hazardous?

regards,

minnesotatuff

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The heaves tend to form more from the rapid expansion of ice and from floating plates that run into one another with the wind(kinda like tetonic plates and earthquakes) The shearing forces cause the ice to heave over one plate or another at the points where there is most resistence. The water being low may have some effect near shore due to more rapid freezing but I wouldn't think it would affect any of the deeper water structure. Wind shear and thin ice is one of the biggest factors to forming ice heaves as a sheet of ice in motion contacts a sheet of ice that is relatively stationary something has to give. Years where there is a slow decline in temps and a steady freeze without wind you will typically see better ice and less "heaving" but a rapid cool down or a substantial wind will increase heaving. Prolonged subzero weather can also increase heaving due to the rapid expansion of new ice as it forms. Heaves will typically form between points of constriction or areas of increased friction along the plates as plates move against one another. Hydrologically speaking that is! laugh.gif

Tunrevir~(low wind,gradual cooling=less heaves)(rapid cooling and/or with high winds =increased heaving) Large surface area with thin ice + high winds =use an access from the other side of the lake!) grin.gif

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Wow!

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thanks tunrevir, great explanation!

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an earthquake is a great explanation. i have been on lake of the woods when 50 inches of ice started to move. there was a huge shove that developed rather quickly. the ice was shaking and rumbling and the water was coming six inches out of the holes and back down. i believe that there are underwater waves caused by the plate over the top of another one. since water is essentially incompressible, the volume of ice being shoved under the ice displaces a roughly the same volume of water. depending on how long the shove is, how deep the ice is, where on the lake it happens, and how fast it happens the underwater reactions can be severe. the bottom of the lake is not going to give, so the only place for the displaced water to move is up. the water can literally lift the ice up and down. it is unnerving when you get on a big one. think of it as an under ice salami. wink.gif

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I just had to chuckle. Maybe tsunami? wink.gif

I hate waking up in the middle of the night, in the pitch black, when the ice shifts around.

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How about when you're sitting there in the quiet and you hear the rumble of a crack running across the lake? Then all of a sudden it goes pop, pop, pop, right through the holes in your house! I had a buddy dive out the door and flop on the ice when that happened! smile.gif

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I can't wait for all of the above to occur!

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only in MN can you get such a deep discussion about ice. Thank God.

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In the 90's superior froze all the way across one year.We walked out two miles at sunup and fished all day.Boy when that bugger heaves and shakes it makes low and millelacs seem like little kids.These guys were out on the lake (first time on ice)from California and when it started to move and crash they went running like Bruce Jenner.We were rolling the rest of the day.good times.c63 smile.gifsmile.gifsmile.gif

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How about pop,pop crack,crack oh what a relief it is,oh you get the jist..........come on cccOLD!!!!!!!!!!!!!JUST WAITING.C63

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hahahaha...

ive never seen anyone react like that, but ive had a few heart stoppers.

regards,

minnesotatuff

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      • Use a headlamp, spotlight or navigation lights to alert other boaters of presence in dark and/or foggy conditions.
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      Live to hunt another day by wearing a life jacket or float coat
      Hunters preparing to hit the water this fall in pursuit of ducks, geese and other wild game are reminded to include life jackets on their hunting gear checklist.
      “Hunters in Minnesota are trained from a young age to always put safety first. For duck and goose hunters, that means always wearing a life jacket on the water, no exceptions,” said Lt. Col. Greg Salo of the Minnesota Department of Natural Resources Enforcement Division. Each year, more waterfowl hunters die from drowning than from other types of hunting accidents. Swamping, capsizing and falling overboard are all common factors leading to these deaths, but in nearly all cases the hunter would have survived had they been wearing a life jacket. “Before launching the duck boat, make sure everyone on board is wearing a life jacket or float coat,” Salo said. “It’s the one item that greatly increases your odds of surviving a water emergency and living to hunt another day.” The wide variety of comfortable, camouflage life jackets designed specifically for waterfowl hunting includes inflatable vest and belt-pack styles, insulated flotation jackets, and foam-filled shooting vests with quilted shoulders and shell loops. “Typical foam-filled vests or float coats provide optimal insulation against cold air and the effects of hypothermia, but without question, the best life jacket for waterfowl hunting is the one you will actually wear,” said Lisa Dugan, DNR boating and water safety outreach coordinator. “Choosing a life jacket style that works for you, and wearing it every time you’re on the water, is not only a good choice – it could save your life.” At the very least, all boats must carry one U.S. Coast Guard-approved life jacket for each passenger, and boats longer than 16 feet must also have a throwable flotation device immediately available. Children under 10 must wear a life jacket. Other water safety tips for duck hunters include: Don’t overload the boat; take two trips if necessary. If wearing hip boots or waders, learn how to float with them on. Stay near shore and avoid crossing large expanses of open water, especially in bad weather. Share your trip plans with someone and advise them to call for help if you don’t return on schedule. Use a headlamp, spotlight or navigation lights to alert other boaters of presence in dark and/or foggy conditions. Carry a cell phone or personal locator beacon in case of emergency. Don’t drink and boat and don’t drink and hunt Visit mndnr.gov/boatingsafety to download the DNR’s “Water Safety for Duck Hunters” brochure and to learn more about boating safety for hunters. Discuss below - to view set the hook here.
    • Rick
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                                                                                                     -30- Discuss below - to view set the hook here.
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