OCR Text |
Show H MEANING OF "SECOND H FOOT" OF WATER H "Second-foot," as defined by H the United States Geological Sur- H vey, is an abbreviation for cubic H foot por second and is the unit B for the rate fordischarge of water H flowing in a stream 1 foot wide, H ITfcjt deep, at a rato of 1 foot Hj I pcrsccond. It is gonorally used H as a fundamental unit in meas- H' urements of stream flow. M -1 nvorago ifuTrTDor of cubic feet of H water flowing per second from B' each square mile of area drained, B k on tho assumption that tho run-Hl run-Hl oil is distributed uniformly both H, as regards time and area. B An Mcro -foot" is equivalent H to 48, 500 cubic foot and is the B quantity required to cover an H acre to tho depth of 1 foot. Tho B term is commonly used in con- R nection with storage for irriga- H on W0l'k. HL Ono second-flow equals 7.81 H1' United States gallons a second, H 448.8 gallons a minute, or 6-10,317 H ' gallons a day. As a California H "miner's inch" equals 0.187 gal- M ' Ions a second, thoro aro 40 Cali- H , fornin miner's inches in 1 sec- m ond-foot. |