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37 <br /> <br />SECTION 2 <br />SECTION 1 <br />0.7 m/s 05 m <br />ORNL-DWG 81-6019 ESD <br />SECTION 4 <br />SECTION 3 % / <br />M/ " <br />\n 7 m/s <br />?-05 m <br />F l-OW <br />D1aEC'(10N OF <br />SPPWNPg4E p,REA03 m <br />mks ??? <br />\-EDGE OF WATER <br />i <br />EDGE OF BANK FULL WATER-SURFACE AREA <br />PREFERRED AREA FOR SALMON SPAWNING <br />1.) DISCHARGE = 2.7 m3/s <br />2.) PREFERRED SPAWNING DEPTH (0.3 - 0.5m) = 97.1m2 <br />3.) PREFERRED SPAWNING VELOCITY (0.3 - 0.7m/s) = 158.5m2 <br />® 41 TOTAL PREFERRED SPAWNING AREA WITH COMBINED <br />DEPTH-VELOCITY CRITERIA = 67.4m2 <br />Fig. 2-4. Example of preferred area calculations using the Washington <br />Method (modified from Collings 1972).