Interval: A scale that represents quantity and has equal units but for which zero represents simply an additional point of measurement is an interval scale. The Fahrenheit scale is a clear example of the interval scale of measurement. Thus, 60 degree Fahrenheit or -10 degrees Fahrenheit represent interval data.
Convert Gallons to Acre-feet: Divide Gallons by 325,851. Example: An 800,000 gallon pond = 2.46 acre feet. Convert Acre-feet to Gallons: Multiply Acre-feet by 325,851. Example: A 5 acre-foot pond = 1,629,255 gallons. Background. One acre-foot is equivalent to one-acre of water that is one-foot deep. An acre is a measure of surface area that totals 43,560 square feet. An acre can be of any shapeâa rectangle, a triangle, a circle, or even a starâso long as its area is exactly 43,560 square feet.
Water at rest; i.e., ponds, lakes, reservoirs, and in the soil, is measured in units of volume â gallon, cubic foot, acre-inch, and acre-foot. Cubic Foot - The volume of water that would be held in a. container one foot wide by one foot long by one foot deep. Acre-lnch - The volume of water that would cover one acre. (43,560 square feet) one inch deep. Acre-Foot - The volume of water that would cover one acre. one foot deep. Flow Units. Water in motion; i.e., flowing in streams, canals, pipe-. lines, and ditches, is measured in units of volume per unit of. timeâgallons per minute (gpm), cubic feet per second (cfs), acre-inches per hour and acre feet per day.