Water Conversions -
Cubic feet per second (cfs):
- 1 cubic foot = 7.4805 gallons.
- 1 cubic foot per second = 7.4805 gallons flowing by a particular point in 1 second.
- 1 cfs = 1.983 acre-feet per day = 646,320 gallons = 2447 cubic meters of water.
- 1 cfs is equivalent to 448.8 gallons of water flowing per minute.
- 1 cfs will produce 724 acre-feet of water per year.
- 1 cfs = 38.4 miner’s inches of water.
Acre-foot (af):
- 1 acre = 43,560 square feet.
- 1 acre-foot = 43,560 cubic feet.
- 1 acre-foot = 325,851 gallons of water = 1233 cubic meters of water.
- 1 acre-foot = 0.504 cfs/ day.
More fun conversions:
- 1 US gallon = 0.1337 cubic feet = 3.79 liters.
- 1 Million gallons = 3.07 acre-feet = 1.547 cfs per day.
- 1 gallon of water weighs 8.33 lbs.
- 1 cubic foot of water weighs 62.4 lbs.
- 1 part per million = 1 milligram per litre = 8.35 lbs per million gallons.
- 1 square mile = 640 acres.
- 1 million gallons per day = 694.4 gallons per minute.
Water Measurements -Water measurements are generally described using rate and volume. When applying for a permit to use water, an applicant is required to submit all measurements in one of the following terms.
When referring to a rate to be diverted, the terms commonly used are cubic feet per second (CFS) or gallons per minute (GPM). When discussing volumes of water, such as amount applied to land, reservoir storage capacity, or yearly consumption, the term used is acre-feet (AF). - Oregon Water Resources Department |
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Water Terms -
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Acre Foot: The measurement of water volume; the amount of water necessary to cover an acre of land, one foot deep.
Contiguous: That which touches or connects, including that which only connects or touches a common point; the touching together of two or more tracts of land that lie alongside one another or that touch or connect with one another for any length or distance whatsoever, no matter how finite.
Canal: A waterway or improved river used to supply water for irrigation.
Diversion: Man-made structures that are or may be used to deflect or divert water from a river or stream into a conduit or impoundment, or canal.
Easement: A property interest held by one party to make use of another's real property for a defined purpose.
Head gate: Valve comprised of a plate that slides over a canal, lateral, or sublateral opening to measure water delivery. Head gates may be adjusted and locked.
Lateral: A partial diversion of a canal or pipeline, used to deliver water to outlying areas.
Lot line: Any property line bounding a lot or parcel.
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Lot line adjustment: The boundary adjustment between lots or parcels by relocating a common boundary that does not change the number of lots or parcels.
Point of Delivery: The place at which water is delivered or transferred to the individual user or users from the District facility.
Tract, private/public: A piece of land in an approved partition or subdivision that is set aside in a separate area from the created lots or parcels for dedication to the public, a homeowners’ association, or other entity (for example, commonly for open space, recreation, sensitive lands, private streets, etc.)
Tail water: The water run-off during irrigation from either flows or storage that travels beyond an irrigator’s property line onto the land of another or the public.
Transfer: The act of conveying or turning over possession of water or water rights to another, in the context of a water transfer.
Water Right: The requirement of a water user to have an area of irrigation equivalent to the size of water rights. For example, 1.5 acres of water right = 1.5 acres of area being irrigated.
Weir: An instrument for measuring water as it is delivered through a slot of standard width with varying height,
such as a dam placed across a river or canal to raise or divert the water or regulate its flow. |
