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<br />001502 <br /> <br />21 <br /> <br />In summary, the steps taken in separating base flow from total flow <br />are as follows: <br /> <br />I. Draw hydrographs of total flow and plot precipitation (figure 3). <br /> <br />2. Determine recessions during periods of no precipitation. <br /> <br />3. Draw recessions on hydro graph (figure 4). <br /> <br />4. Determine end of direct runoff (the beginning of the base-flow segment <br />of the recession). <br /> <br />5. Determine ending of base-flow recession (at following direct runoff peak). <br /> <br />6. Apply steps 4 and 5 to recessions (figure 5). <br /> <br />7. Connect end of one base-flow recession to beginning of next (figure 6). <br /> <br />8. Smooth sharp base-flow peaks (figure 7). <br /> <br />The base-flow hydrographs have been developed for each station (table l) <br />for the period of record in accordance with the above steps. <br /> <br />The base-flow determinations pre sented herein should not be consider- <br />ed the exact answers, but are believed to be reasonable. Studies are now <br />in process in Kansas to improve the technique of interrelating ground- <br />water levels with streamflow during periods of base flow. <br />