Posted on December 10, 2010 by thepondguy
Are there any tips to making sure the ice on my pond is safe to stand on?
Nicki – Sandusky, OH
Winter brings not only cold weather and snow to your pond or lake but a perfect layer of ice for skating, ice fishing, snowmobiling and other fun as well. While you may be eager to get out on the ice this season, it is important that you know how to distinguish the difference between safe strong ice and a potential hazard.
There are a lot of different factors that determine the ice thickness on a water body. Temperature has a large part in ice formation of course but water currents, wind and snow coverage also play a role in how water freezes. You should see a satisfactory layer of ice form on your pond after two to three weeks of freezing temperatures. Once temperatures stabilize and the ice has time to thicken you can venture onto the surface and perform an inspection.
You can visually determine the quality of ice by looking for bubbles, trapped snow, cracks and color. A clear solid blue layer of ice is stronger than a white brittle formation caused by air pockets and other flaws. Keep in mind that a pond with a running aeration system will have air pockets and should not be used for recreation in the winter. Naturally new ice is stronger than old ice as there are less chances of warm weather thawing and re-freezing. Once you have inspected the surface of the ice you can drill or cut samples to verify thickness. Since a water body will not always freeze evenly you will want to take samples in multiple locations as you work your way out towards the center. A layer of ice less than 3 inches is unsatisfactory for most people to walk out onto. It may be able to hold up lighter people or small animals but can easily crack. If you plan on having a group of people on the pond or want to take your snowmobile out on your lake an ice formation of 6-8 inches minimum is ideal. Click over to our blog on Ice Formation for more information regarding ice thickness and formation.
Be patient this winter and exercise extreme caution when venturing onto the ice. Taking the extra time out to visually inspect your ice and take samples can mean all the difference between a fun day outdoors or potential injury. Always make sure there is a floatation device within reach in case of a fall-through and always use common sense when venturing out on the ice.
Pond Talk: How do you determine when it is safe to venture out onto your pond or lake in the winter?
Filed under: Pond & Lake, Winterizing | Tagged: caution, ice, ice thickness, thin ice | Leave a Comment »
Posted on December 2, 2010 by thepondguy
How does ice form on a pond?
Jonathan – Denver, CO
You look forward to and enjoy the ice formations that appear on your pond each winter but have you ever wondered how it begins? Why is it that the ice in your pond expands when it freezes instead of shrinking and why does ice float?
Unlike those horror flashbacks of falling asleep in science class we’ll keep this as simple and interesting as possible. As the air cools off outside your water looses heat and becomes heavier. This cool and heavy water sinks to the bottom of the pond as the lighter warmer water rises to the top to cool. This process continues until the pond water reaches about 4 degrees Celsius or 39 degrees Fahrenheit and the water cools enough to freeze. Water is unique in the fact that as is it freezes its molecules form crystals that are spaced farther apart causing ice to expand and take up more space. Once the water in your pond begins to form these crystals and expand it actually becomes lighter than warmer unfrozen water and once again begins to rise to the surface of your pond where it begins to form a sheet of ice. If this all seems a bit too wordy or confusing to you visualize a glass of water with ice cubes in it. The spaced out, crystallized, water molecules of the ice cubes make them lighter than the water in the glass and cause them to float at the surface of the water. The water in the glass that is cooled by the ice cube (but not cold enough to freeze) becomes more dense and sinks to the bottom of the glass and the warmest water rises to the top where it is cooled by the floating ice cubes.
The layer of ice formed by this crystallized frozen water can become fairly strong as it becomes thicker. An inch of ice can be strong enough to hold a small animal without cracking. 3 inches of ice typically is enough to bear the weight of the average person and once a pond freezes to 6 to 8 inches thick it is ready to play host to a hockey game or hold up a snowmobile. Some have even taken their cars out on the ice! While we don’t recommend you give it a try, 8 to 12 inches of ice can support a slowly moving vehicle.
Pond Talk: What do you use your pond for in the winter? Do you skate? Ice fish?
Filed under: Benefits of Owning, Benefits of Owning, Pond & Lake, Uncategorized, Water Gardens & Features, WG-Winterizing, Winterizing | Tagged: ice crystals, ice formation, ponds and ice | 4 Comments »