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<br />0017J6 <br /> <br />36.2--11 <br /> <br />WATER INFORMATION MANAGEMENT SYSTEM HANDBOOK <br /> <br />b. The worksheet {ex. 5} used for calculating required maintenance flows <br />for Gold Creek is the same one used to estimate the maintenance flows for <br />a representative station (Gander Creek) as shown in exhibit 3: Using the <br />Q/QB ratios {column 6} and durations (columns 4, 5a, 5b, 5c) calculated <br />for the representative station in exhibit 3, enter these same values in <br />the appropriate columns on the worksheet for Gold Creek {ex. 5}. <br /> <br />{1} Multiply the Q/QB ratio values in column 6 by QB {185.B cfs} <br />and record in column 7. <br /> <br />( <br />\ <br /> <br />{2} Record in column 8 the same time-volume coefficients (TVC) <br />calculated for Gander Creek {ex. 3}. <br /> <br />{31 Multiply TVC {column 8} by QB (l8S.8 CFS) and record total <br />acre/feet volume for QB' QR, QL1' and QL2 in column g. <br /> <br />(4) The maintenance flow requirements for the pOint of quantification <br />are summarized by the three major components at the bottom of the <br />worksheet. The following are recorded: <br /> <br />(al Total volume of bankfull flow (QBI in AcFt. <br />(b) Total volume of rise-recession flow (1/2 QR) in AcFt. <br />(c) Total volume of baseflow (QL) in AcFt. <br /> <br />(5) Sum these three component volumes for a total maintenance flow <br />(QI) volume in AcFt. <br /> <br />(6) Estimate mean annual discharge (QA) for pOint of quantification <br />by multiplying the ratio Q/Q8 (which corresponds to mean annual <br />discharge for representative station) by bankfull discharge calculated for <br />the point of quantification. (For this example, QA . 0.163 x 185.8 . <br />30.3 cfs.) <br /> <br />(7) Calculate estimated total water yield for the pOint of <br />quantification using mean annual discharge .(QA x 365 days x 1.9835) or <br />methods described in Step 4. <br /> <br />(B) Component volumes and total maintenance flow volume are then <br />represented as percentage of the estimated total water yield. <br /> <br />10 No. 1 <br />9/10/85 <br />