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<br />I <br />, <br />t <br />t <br />I <br />t <br />t <br />, <br />I <br />I <br />I <br />, <br />t <br />t, <br />t <br />t <br />t <br />I <br />I <br /> <br />OC2149 <br /> <br />given stretch of the river. Any variation in these therefore has an <br /> <br /> <br />influence upon the amount of return flow to the stream and the <br /> <br /> <br />availability of water for diversion Into the various ditches. It <br /> <br /> <br />can be seen therefore that any redistribution or changed regimen of <br /> <br /> <br />use of water throughout the numerous reaches of a stream alters <br /> <br /> <br />return flow in these reaches, and If a solution of the problem Is <br /> <br /> <br />to be obtained, all important factors must be considered even Including <br /> <br /> <br />the lag or travel time of ground water from one given point to another. <br /> <br />This particular regression analysis was made to determine the relative <br /> <br /> <br />Importance of the variables listed heretofore and through the regression <br /> <br /> <br />analyses, the least Important Items influencing return flow are <br /> <br /> <br />rejected first, as indicated by the numbers in the right hand column. <br /> <br /> <br />The machine then continues to throw out the other less Important <br /> <br /> <br />influences on down through all variables. By analyzing the data <br /> <br /> <br />thus derived, the relative magnitude of each influence on return <br /> <br /> <br />flow In this particular study can be assessed and reasonable equations <br /> <br />established for Inclusion in the master program to reconstruct or <br /> <br /> <br />modify any given set of conditions at will. <br /> <br /> <br />By the old "pick and shovel" method; that Is, setting up <br /> <br /> <br />an analyses of this kind by long hand and computing equation <br /> <br /> <br />coefficients by use of a calculator requires about three man days per <br /> <br /> <br />study. I should like to point out that the 61 analyses were run on a <br /> <br /> <br />digital computor for a total cost of less than $100.00 and this is <br /> <br /> <br />equivalent to about 180 man days of work. trust that by now the <br /> <br /> <br />Importance of such a procedure Is apparent. If we are to determine <br /> <br /> <br />benefits that can be derived by regulation of streamflow in the <br /> <br /> <br />Arkansas River Basin and the elimination of winter diversions, these <br /> <br /> <br />changes In Inflow must be accounted for in order that the reconstructed <br /> <br />flows of the stream can be determined, and who receives the benefit <br /> <br /> <br />from such a procedure, <br /> <br /> <br />This is but one small part of the studies that we have <br /> <br /> <br />performed to date and I will show you the total amount of printed <br /> <br /> <br />matter for the 61 regression analyses studies if you so desire. It Is <br /> <br />-7- <br /> <br />- <br /> <br />~ '~ <br />