a measurement of water flow. It represents the number of million gallon increments of volume passing by a stationary point in a 24-hour period. Million gallons is abbreviated as MG.
a rate of flow of water equal to 133,680.56 cubic feet per day, or 1.5472 cubic feet per second, or 3.0689 acre-feet per day. A flow of one million gallons per day for one year equals 1,120 acre-feet (365 million gallons).