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4' (1.2m)
Salt typically lowers the freezing point of water, but your water line should be buried deep enough that it never freezes regardless of what happens on the surface above it.
ISOBATH
Depth of Water Measurement.Water is measured by many strategies such as a sounding line, depth guages (based on pressure) and by sonar messurement. Before the moden age, sailors would throw lead weighted lines into the water. These were marked off in six foot increment (fathoms) and would call out the depth, or int he old English phrase - sound off, hence the term sounding the depth.Submarines brought a new requirement for depth measurement, the need to know how deep the boat was in the water. Since water has weight, there is a direct correllation to the depth of the water and the pressure outside the submarine. Most depth guages are calibated in feet or meters of seawater as most submarines operate in salt water, which is heavier than fresh (non-salty) water.Modern electronics has now allowed sophisticated measuring devices to bounce waves off the bottom and determine exaclty the depth of water that a boat is in. This is now used on many pleasure and fishing boats as a necessary navigation aid.Satellite detection of water depth is now used to determine changes in fresh water reserves on continents and to determine the changes in climates and geography.
18 inches
The frost depth level below area's usually not less than 800 mm .
isobathn. line of map passing through all points of equal depth below water.
The length of anchor line is called "Scope" by mariners. The scope of your anchor line should be 5 to 7 times the depth of water that you're anchored in. It should never be less than 3 times the depth. In other words if you usually anchor where the water is 20 feet deep you should have a MINIMUM of 100 feet of line.
Not directly you cant, but sea temperature does decrease with depth, although its not a straight line graph ( though depth : pressure is.)
Plimsoll line?
The set frost line for Maine is 40 to 42 inches. All water lines and foundation footings should be below this depth to prevent damage or breakage.
10-15 times the depth of the water
0 °C was defined as the freezing point of water
the length should be 8 times the depth of the deepest water you are planning to anchor in.
3X
If the line is outside, sloping will prevent the risk of freezing/braking if there is not water in the line! Inside, it just prevents risk of drips and bacteria growing in what could be stagnant water.
No. Water will continue running until hydrant is either repaired or replaced.