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<br />105:1 <br /> <br />WATER BUDGET COMPUTATIONS FOR IRRIGATION SEASONS 1968 TO 1970 <br /> <br />Calculation of a water budget consists of determining the difference <br />between the amount of water entering an area (inflow) and the amount of water <br />leaving an area (outflow) during a period of time. The difference between <br />these two quantities is the change in water storage during the period. <br /> <br />Inflow to the Oxford Farmers system can come from three sources: <br />headgate diversions, precipitation and seepage from the Arkansas River. Seep- <br />age from Chicosa Creek and the Apishapa River and ground water that moves into <br />the system from outside areas were considered negligible. Ground water used <br />for irrigation is not included in the inflow because it originates within and <br /> <br />SP <br /> <br />CUp <br /> <br />NEV <br /> <br /> <br />ARKANSAS <br /> <br />RIVER <br /> <br /> <br />Akcd <br /> <br />RF <br /> <br /> <br />oxd <br /> <br />~ <br />f% <br />e- <br />: <br />C) <br />lJ <br />J <br /> <br />Q:- <br />lU <br />:.. <br />1i= <br /> <br />OXd-OXs <br /> <br />CUe <br /> <br />~ <br />~ <br />1j <br />C( <br />"I'" <br /> <br /> <br />Grd <br /> <br />FARMERS <br /> <br />DITCH <br /> <br />O'l.s <br /> <br />. ). <br /> <br />~ Calcula.ted fenl1 <br /> <br />Sketch 1 - Oxford Farmers Ditch Company System <br /> <br />not outside of the system. Outflow can occur in two forms: evapotranspiration <br />or consumptive use of all vegetation and seepage and springs which take water <br />from the ground water reservoir and give it to the Arkansas River. The dif- <br />ference between inflow and outflow is the change in ground water storage during <br />the period. If the inflow is greater than the outflow there is a gain in ground <br />water storage or recharge of the aquifer. <br /> <br />The water budget in equation form is as follows (see Sketch 1): <br /> <br />- 14 - <br />