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<br />RQ50 = 1.02 x 102 A 0,657 (10 - F)O,235 Gf , standard error <br />40% <br />Log RQlOO = 4.37 - 1.78 A.O,25+ 0,23 (Log (R - 18.0)) <br />(Log 124,1 (0), standard error 39% <br />Log RQ500 = 3.044 + 0.646 Log A - 0,049 (Log A)2 + 0.614 <br />(Log SL) (Log (ST +<0)), standard error 42% <br />Minimum and maximum allowed values for variables: <br /> <br />Varlabla Minimum Maximum <br />A 0,05 2000,00 <br />SL 0,70 20,00 <br />ST 0,99 50,00 <br />F 5,30 23,00 <br />Gf 10.00 19,00 <br />R 11.29 16,53 <br />124,100 0,82 5,32 <br /> <br />Notes: The total number of variahles in ALL equations of <br />this region is 7, The last two equations have to be converted <br />into non,logarithmic fonn (like RQ2 - RQ50), See below for <br />conversion example. <br />The citywide urban equations for city "Capitol City": <br />UQ2 = 2,028A 0383 [K (1.0 + om AD)]o,447, standard error <br />25.1% <br />UQ5 = 6,68A087 (SL - 12)043 IAO.70, standard error 30,0% <br />UQIO = 2,27A053 SLOA5 RQI00.23, standard error 43,0% <br /> <br />Minimum and maximum allowed values for variables: <br /> <br />Variable Minimum Maximum <br />A 1.33 1.82 <br />SL 0,70 20,00 <br />AD 0,99 50.00 <br />K 5,30 23.00 <br />IA 10.00 19,00 <br /> <br />Notes: UQ25,UQ500 are omitted as this is an example. <br />The total number of variables in ALL equations of <br />this 'region' is 5. <br />(Note this total does not include RQIO,) <br />Note that the first equation is converted into this <br />equivalent fonn in order to be represented for use <br />by NFF: <br /> <br />Q2 = 2.028 A0,383 K0447 [(100 + AD)>o.01]0,447 <br /> <br />Following is an example of the data base containing the <br />regression equations shown above, <br /> <br />NS North_Somewhere <br />2 Region_I <br />7 <br />A Drainage_Area_(sq_mi) 0,05 2000.0 <br />SL Slope_(ftlmi) 0,70 20.0 <br /> <br />ST Basin_Storage_(%) 0,99 50,0 <br />F ForesCcover_(%) 5,30 23,0 <br />GfGeographicJactor 10.0 19,0 <br />R Relief 11.29 16,53 <br />124,100 24_hour_rainfalUntensity_(in) 0,82 5,32 <br />46,07,056,72 <br /> <br />I 0,0 1.00,335 00,00.0 <br />20,0 1,00,23500,00,0 <br /> <br />38,00,064,1 3 <br /> <br />I 0,01.00,22400,00,0 <br />2 -1.0 1.00,345 00,00,0 <br />3 2,0 1.0 -,234 0 0.0 0,0 <br /> <br />0.0 10.072.42 <br /> <br />I 0,0 1,0 0,345 I 0,0 -.02 <br />20,00,001 0,23400,00,0 <br /> <br />0,00,00,00 <br />40,00.0 102,03 <br /> <br />I 0,0 1.00,65700,00,0 <br />4 -10.0 1.00,235 00,00,0 <br />5 0,0 1.0 1.0 00,00,0 <br /> <br />39,00.023442.3 2 <br /> <br />6,18.01.0 0,23 -7 0,0 1.0 <br />o 10,01.0-1.78 10,0-,25 <br /> <br />42,00,01106.623 <br /> <br />I 0,0 1.00,646 00,00,0 <br />10,01,0 -,049 -10,01,0 <br />20.0 1.00,614,30,01.0 <br /> <br />$Capitol_City <br />3 <br />A Contributins..Drainage_Area_(sq_mi) 1.33 1,82 <br />SL Slope_(ftImi) 0,70 20,0 <br />AD Percentage_oCUrban_DevelopmenU%) 0,99 50,0 <br />K Bank-full_Channel_Conveyance 5,323,0 <br />IA Impervious_Surfaces_(%) 10.0 19.0 <br />25,1 0,02,028 3 <br /> <br />,I 0,0 1.00,383 00,00,0 <br />40,0 1.00.44700,00,0 <br />3 100,00,010,44700,00,0 <br /> <br />30,00.06,68 3 <br /> <br />-10,01.00,8700,00,0 <br />2 -12,01.00,4300,00,0 <br />50,01.00.7000,00,0 <br /> <br />43.00,02,273 <br /> <br />-10,01.00.5300,00,0 <br />20,0 1.00,45 0 0.0 0,0 <br />-20,01.00.23 0 0,0 0,0 <br /> <br />APPENDIX B - DESCRIPTION OF THE NATIONAL FLOOD FREQUENCY PROGRAM 193 <br />