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<br />. <br /> <br />. <br /> <br />. <br /> <br />..... <br />.... <br />t;1) <br />rv <br /> <br />Definitions of Terms <br /> <br />Acre-foot (A.F., acre-ft) is the quantity of water required to cover 1 acre <br />to a depth of 1 foot and is equivalent to 43,560 cubic feet or about <br />326,000 gallons or 1233 cubic meters. <br /> <br />C.f.s.-day is the volume of water represented by flow of 1 cubic foot per <br />second for 24 hours. It is equivalent to 86,400 cubic feet, approximately <br />1.9835 acre-feet, about 646,000 gallons or 2447 cubic meters. <br /> <br />Concentration is the flow-weighted average concentration of total dissolved <br />solids (salt) measured in mg/L or tons/acre-foot. <br /> <br />Consumptive Use is the total amount of water taken up by vegetation for <br />transpiration and evaporation. <br /> <br />Cubic feet per second (c.Ls.) is the rate of discharge representing a <br />volume of 1 cubic foot passing a given point during 1 second and is equiv- <br />alent to approximately 7.48 gallons per second or 448.8 gallons per minute <br />or 0.028 32 cubic meters per second. <br /> <br />Depletion is <br />tive uses, <br />diversion. <br /> <br />the total loss of water from the river system due to consump- <br />evaporation, seepage, evapotranspiration and transmountain <br /> <br />Discharge is the volume of water plus suspended sediment that passes a <br />given point within a given period of time. <br /> <br />Diversion is the total amount of water diverted. <br /> <br />Drainage Basin is a part of the surface of the earth that is occupied by a <br />drainage system, which consists of a surface stream or a body of impounded <br />surface water together with all tributary surface streams and bodies' of <br />impounded surface water. <br /> <br />Estimated Flow is the flow that is estimated for periods of time in which <br />no records of flow are available. The flow may be estimated by correlation <br />or other accepted methods. <br /> <br />Gaging Station is a particular site on a stream, canal, lake, or reservoir <br />where systematic observations of hydrologic data are obtained. <br /> <br />Historical Flow is the flow actually experienced at the gaging station or <br />point of measurement. It is the total runoff of a drainage area above the <br />point of measurement as influenced by nature and the activities of man. It <br />may be recorded or estimated. <br /> <br />Instantaneous Discharge is the discharge at a particular instant of time. <br /> <br />Mean Discharge is the arithmetic mean of individual daily mean discharge <br />during a specific period. <br /> <br />125 <br />