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<br />III. Sample Computations For Recommended RICD Flow Rate Range . <br /> <br />. <br /> <br />Using the technical requirements of the Appendix, Section II, Summary Of Selected <br />Technical Criteria For Artificial Whitewater Courses, flow rates would have the <br />following range: <br /> <br />Lower end flow rate* = 0.5 feet x 16.5 feet x 6.6 feet/second = 54 cfs <br /> <br />Upper end flow rate* = 3.0 feet x 16.5 feet x 6.6 feet/second = 326 cfs <br /> <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 streamflow velocity in feet per second. <br /> <br />The computed low and high-end flow rates of 54 cfs and 326 cfs, respectively, support <br />the CWCS'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 /> <br />. <br /> <br />The ewes 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 ewcs has attempted to <br />develop guidelines using a variety of sources as stated in the main body of this manual. <br /> <br />Literature on water-based recreation opportunities discusses "passage-oriented" and <br />"destination oriented" facilities. As stated in the introduction of this Manual, the <br />primary focus of the CWCB's RICD policy is for "destination-oriented" whitewater <br />boating as the main recreation experience sought by Applicants. There are recreational <br />opportunities that vary over a fairly wide range of flow rateS. At the low end of the <br />flow range, facilities may act to simply aI/ow passage of boats from one point to another <br />in a safe manner. Moving up the scale, facilities may be deemed to have "local merit". <br />At the top of the scale, facilities may be considered to be "Olympic" or "international" in <br />nature for "competitive" uses. The quoted terms do not appear to have precise <br />definitions and are provided here for the Applicants awareneSS only. The CWCB has <br /> <br />13 <br />