From the wikianswers:
"Scientifically, a pond is any man made body of water where light is found in the entire pond body of water. A lake is any body of water that has a profundal-zone http://www.answers.com/topic/profundal-zone
Hence a water body of depth 2.5 m can at best be called as a pond only.
The nature of construction of the water body is given in the question. If it is a masonry/concrete construction it can be called a as sump/tank/reservoir as well.
Usually ponds and lakes have natural ground as the base.
Multiply the area of the water (in square meters) by the average depth (in meters). Then divide by one thousand to get the volume in liters. For a smaller puddle, multiply the area in square centimeters by the average depth in centimeters; then multiply by one thousand.
The official UK measurement for measuring water depth is in meters.
about 968 meters
10 meters of water depth equals about 1 atmosphere.
the maximum depth fish can live is 400 meters under water
not a shore
2 meters im a player
10.20 meters in depth
One Bar is 10.2 Meters of fresh water or 9.0 meters of saltwater. it is 204 meters for fresh water. and 180 meters in salt water. :-)