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rates between 0.10 and 0.37 m3/hr-m for slope lengths up to 64m and for <br /> application periods up to 16 hrs/day. Design values for Q, q, and P should be <br /> 0 <br /> selected to allow operating flexibility during periods when parts of the system <br /> must be shut down for harvest or repair and to provide a, factor of safety in <br /> process performance. <br />�i Design Daily Flow <br /> Selection of the design daily flow (Q) will depend on whether equalization <br /> or temporary storage facilities are provided. It is preferrable to provide such <br /> facilities to allow constant application rates and for short-term storage during <br /> power outage or extremely heavy precipitation. For systems without equalization <br /> or temporary storage facilities the design daily flow (Q) should be based on the <br /> peak average flow during a selected period. A 4-hour period is suggested, but <br /> other periods may be more appropriate for unusual flow conditions. For systems <br /> with equalization facilities design daily flow should be based on peak seasonal <br /> I <br /> average daily flow. <br /> Design Application Rate <br /> The application rate (q) is used to determine the slope length (z) and in <br /> equation 5-2 to calculate the required area. The value of_q used in equation i <br /> 5-2 should be less than, the value used to determine z to-.provide a_.factor of <br /> safety in process performan_ce._and.,to allow operating flexibility by permitting <br /> a range of application rates to be used. A factor of 1.5 is suggested for design. <br /> Thus, if a design value for q of 0.37 m3/hr•m is used to determine z, then a <br /> design value for q should be 0.25 m3/hr•m (0.37 divided by 1.5) and this value l <br /> should be used in equation 5-2 to calculate the required area. The distribution <br /> i <br /> system should be designed to handle the range of flows resulting from these <br /> two application rates. <br /> s <br /> -63- <br />