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how can i tell how deep my pond really is besides going in and measuring it. and ive check to see if theres any record of it and

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  • how can i tell how deep my pond really is besides going in and measuring it. and ive check to see if theres any record of it and

    how can i tell how deep my pond really is besides going in and measuring it. and ive check to see if theres any record of it and theres not

  • #2
    well go out there with a boat that has some sort of computer depth measure on it and that is the easiest way besides measuring it by hand.

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    • #3
      There is a way to measure it from the edge of the pond if you are still up to speed on your geometry. Estimate the distance to the center of the pond and reel off enough line to reach it. Tie on a lead sinker with exactly the amount of line you estimated. You will now know the length of one side of a right triangle.
      Throw the sinker out to the center of the pond, allowing it to take as much line with it as it will need to reach the bottom. You will then know the length of the second side of that right triangle, which in this case would be the hypotenuse.
      Now, using the Pythagorean Theorem, you can calculate the third side of the triangle, which in this case would be the depth of the pond.
      The square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
      I don't think all those calculations will be necessary if the lead sinker does not reel off much more line that you first estimated, because the pond would probably not be more than six to ten feet deep.

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      • #4
        What's wrong with getting wet? Swim out with a 10-14 ft bambo if you think the pond might be over your head. Can't swim? take a noodle and a life jacket!

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        • #5
          get in your boat, turn on the depth finder.

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          • #6
            If I remember my Mark Twain correctly, tie knots at given intervals in a rope, then put a weight on the end and drop it stright down. And 99explorer, I like the Pythagorean Theorem, but if the bottom makes a curve, there will be a small error in the lenght of the hypotenuse. Yet even with error, A square plus B square equals C square is the best method to get a good quick idea. Plus one for you!!!!

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            • #7
              Borrow some little kid's float and paddle out to the middle with a kite string and a rusty bolt tied to the end. Let it down till it stops, mark the string then measure it when you get back to shore. You may wish to add some beverage to your equipment list and enjoy a lazy float-around while you're out there. Get some sun, splash your toes in the water and have some fun with the project.

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              • #8
                I meant to include the fact that this allows you to avoid having to do math.

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                • #9
                  country road has the winning method here!you might want to measure a few times though.

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                  • #10
                    I agree that country road has a winning method, but hammelhi3 did specify that he didn't want to go out and measure it.

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                    • #11
                      Take a 10 foot 1.2 pvc pipe, jam a 12 inch rebar in one end and throw like a javilin into the deepest part of the pond, you'll get a better idea how deep it is. No need to fire up the old 10th grade Geometry synsapes, those thing are know to misfire at times.

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                      • #12
                        Cgull-
                        Good answer if the pond is shallower than ten feet.

                        And if the pvc pipe disappears from sight, you would know that the pond is deeper than 10 feet, but you would still not know just how deep it is.

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                        • #13
                          ther is a thing u can buy from cabelas it is sort of lke a litle bobber u can ty it to the end of your line and it cames with a little screen that u clip on to your rod and cast it out and it will show almost everything a fishfinder on your boat shows fish, structure, and depth

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                          • #14
                            Get a slip bobber with a large weight on it. Every time the slip bobber goes under move the bobber stop up and if it lays down move the bobber stop down. when you get it to stand upright you have your depth. Measure the line from the weight to the bobber stop.

                            If you really want to get fancy, you can take a bunch of measurements and plot them into a gis. U can use either an aireal photo or you can plot the waters edge with a gps. With your measurments you can come up with a underwater contour of your pond. Its a ton of work and most modern depth finders do it for you but it is an option.

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