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<br />001602 <br /> <br />36.1--4 <br /> <br />WATER INFDRMATION MANAGEMENT SYSTEM HANDBDDK <br /> <br />3. All of the stations listed in exhibit 1, rows a-I are suitable <br />stations. <br /> <br />4. The relationships which will be developed will be used, along <br />with field measurements, to quantify additional drainages within the basin <br />of adjudication if requests for additional points of quantification arise <br />later in the adjudication process. <br /> <br />5. Bankfull stage channel top width will be measured at bankfull <br />discharge where and when possible. The indicators of bankfull channel top <br />width will be used if it is not possible to measure this channel feature <br />during the bankfull discharge event. <br /> <br />6. The occurrence of bankfull discharge at the gaging station will <br />be visually identified in the field as it occurs and the discharge <br />associated with that point in time will be extracted from the station <br />records. <br /> <br />7. Bankfull stage channel top width will be measured at no less than <br />three points in an uncontrolled reach and the values will be averaged. <br /> <br />Following is the stepwise analysis: <br /> <br />Step 1 - The needed data are found in exhibit 1. <br /> <br />Step 2 - Using station records for the representative station{s) and/or <br />field measurements, bankfull and baseflow di~charges are determined. The <br />results of this step (for Gander Creek) are: <br />QB = 173 cfs <br />QLl = 5.0 cfs <br /> <br />Step 3 - Using the methods described in Appendix C, three bankfull width <br />(WB) measurements are made and averaged at the representative and all <br />suitable stations. <br /> <br />Step 4 - For all suitable stations bankfull discharge is measured or <br />calculated using measured channel cross-section area, stage or width and <br />station records (as in step 2). <br /> <br />Step 5 - Using the values of QB developed in steps 2 and 4 and the <br />respective bankfull channel widths, the following regression equation is <br />developed: <br /> <br />QB = 6.53W~.07 <br />