| Show MEASURING WATER TIED The volume of water flowing in a stream called railed the run off or dis discharge charge harge is expressed In various terms terms wh which ch however howe may be he ed cd into two groups those groups those representing represent represent- ing lug rate fate of flow ow and those representing represent represent- ing lag actual quantity of water The rite rate of flow tIow is generally expressed as second foot second foot an on for Cor pubic cubic teet per second the un unit t used for measuring flowing water as gallons gal gal gallons lons Ions per minute the unit used In Connection ton with pumping and and city water supply y as miners Inch the unit used by y miners and irrigators for or measuring water that passes through au an orifice one inch square under a head that varies locally and andas as second feet teet per square mile thu unit used to to represent the average a number of oC cubic feet of oC water water flowing flow flow- big ing per second from each square mile of area area dra drained on the Ule assumption that the run off is distributed uniformly uniformly uni uni- both as regards time and area The actual quantity of water Is ex expressed ex expressed pressed by the terms run off in Inches feet acre and million gallons Runoff In Inches ex expresses ox- ox presses t the e depth to which h the drain ago age area aren would be covered if f all aU th the water from Crom It In a given ped period pe pc were conserved and uniformly distributed on the surface sed for comparing run ort run off with ra rainfall foot Acre la Is used commonly In connection connect with storage for Cor Irrigation Irrl gation gaton is the quantity ty of ot water re required roI ro- ro I to cov cover r an acre to the depth of ot one foot that foot that Is cubic feet V In the tho the territory territory of ot Hawaii the tho unit most commonly used in measuring the tho flow of or water Is IB million gal gal- tons Ions This unit units s i s used not only to Indicate a rate of flow million gallons gallons gallons gal gal- lons per day but an actual quantity quantity quan quan- of ot water stored In a reservoir |
