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Sample Computations For Recommended RICO Flow Rate Range <br />Based on the information provided in the "Summary Of Selected Technical <br />Requirements For Artificial Whitewater Courses ", the CWCB has based, in part, its <br />recommendation for destination- oriented RICO flow rates on the following: <br />Lower end flow rate* = 0.5 feet x 16.5 feet x 6.6 feet /second = 54 cfs <br />Upper end flow rate* = 3.0 feet x 16.5 feet x 6.6 feet /second = 326 cfs <br />*Flow rates computed using continuity equation, Q =AV, where; <br />Q = stream discharge in cubic feet per second. <br />A = cross - sectional area of stream in square feet (depth x width in this case). <br />V = average streamf low velocity in feet per second. <br />The computed low and high -end flow rates of 54 cfs and 326 cfs, respectively, support <br />the CWCB's recommended RICD flow range of 50 cfs to 350 cfs for destination - <br />oriented boating courses. The upper end flow rate (326 cfs) accounts for the depth <br />required to perform a safe Eskimo roll at a given stream section assuming a reasonable <br />width for recreational kayaking activities (A 16.5 foot width was used here as the <br />recommended width for a 2 person canoe to safely turn sideways). The lower end flow <br />rate (54 cfs) accounts for the depth to float a boat at a given stream section assuming <br />a width necessary to allow a two person canoe to turn sideways. <br />The CWCB is aware that the above computations are based on slalom course <br />recommendations that were published in 1989. Unfortunately, there does not seem to <br />be a published or accepted source of more current information for design criteria <br />related to rodeo or play boating courses, and therefore the CWCB has attempted to <br />develop guidelines using a variety of sources as stated in the main body of this <br />document. <br />8 <br />