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<br />Magnitude <br /> <br />. <br />1 <br />.,.,.':>.j <br />"'j <br />:~,_.: . I <br /> <br />Time, Hr. <br /> <br />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br /> <br />o <br />0.25 <br />0.50 <br />0.75 <br />1.00 <br />1.25 <br />1.50 <br />1.75 <br />2.00 <br />2.25 <br />2.50 <br />2.75 <br />3.00 <br /> <br />Duration <br />(minutes) <br /> <br />(4) & (5) Calculate IS-minute incremental amounts <br />from accumulative basin rain. <br /> <br />Probable maximum thunder- <br />storm point rainfall <br />in inches <br /> <br />15 <br />30 <br />45 <br />60 <br />75 <br />90 <br />105 <br />120 <br />135 <br />150 <br />165 <br />180 <br /> <br />5.36 <br />7.92 <br />9.82 <br />11.16 <br />12.28 <br />13.06 <br />13.62 <br />14.06 <br />14.40 <br />14.68 <br />14.84 <br />14.95 <br /> <br />(6) <br /> <br />Incremental <br />rainfall <br /> <br />5.36 <br />2.56 <br />1. 90 <br />1.34 <br />1. 12 <br />0.78 <br />0.56 <br />0.44 <br />0.34 <br />0.28 <br />0.16 <br />0.11 <br /> <br />Arrange the IS-minute incremental rainfall amounts <br />in the magnitude order sequence given in Table A-8, <br />Appendix A, Page 543. <br /> <br />Order of magnitude of IS-min. <br />incremental rainfall amts. <br /> <br />Incremental rainfall <br /> <br />o <br />4 <br />3 <br />2 <br />1 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12' <br /> <br />, Limiting duration of zone thunderstorm rainfall <br /> <br />- 9 - <br /> <br />o <br />1. 34 <br />1. 90 <br />2.56 <br />5.36 <br />1. 12 <br />0.78 <br />0.56 <br />0.44 <br />0.34 <br />0.28 <br />O. 16 <br />0.11 <br />