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<br />Table 1 Summary statistics for discharge at the streamflow-gaging station Colorado River at Lees Ferry 109380000), Arizona, <br />water years 1992-99 <br /> Water year <br /> 1992 1993 1994 1995 1996 1997 1998 1999 <br /> Minimum daily discharge summary (values in cubic meters per second) <br />Minimum 148 151 160 158 230 187 201 249 <br />Median 232 230 240 259 345 575 470 :no <br />Mean 234 238 250 310 )76 504 442 345 <br />Maximum 323 408 345 541 1.290 759 855 702 <br />Standard deviation 42 44 44 113 138 165 76 62 <br /> l\'lean daily discharge summary (values in cubic meters per second) <br />Minimulll 179 205 206 194 231 220 249 292 <br />Median 303 306 314 )28 436 595 547 430 <br />Mean 312 317 324 361 449 542 525 446 <br />Maximum 42~ 4YU 447 558 1.290 762 869 708 <br />Standard deviation 54 61 59 107 135 143 78 72 <br /> Maximum dail)' discharge summary (values in cubic meters per second) <br />Minimum 228 226 232 221 232 232 281 348 <br />Median 367 368 377 )88 518 603 612 504 <br />Mean 379 385 389 410 518 576 592 518 <br />Mnimulll 530 564 629 569 !JOO 767 872 711 <br />Standard deviation 66 76 72 102 133 124 77 78 <br /> Daily range (daily maximum - daily minimum) discharge summary (values in cubic meters per second) <br />Minimum 39 2.0 2,0 3.1 2.0 2.8 5.7 0.0 <br />Median 148 142 140 102 139 34 147 178 <br />Mean 145 146 139 101 142 72 150 173 <br />Maximum 227 280 331 IY3 1.050 38.\ 368 261 <br />Standard deviJtion 36 41 41 37 75 67 50 .13 <br /> <br />~1'211 <br /> <br />Inrroducrion 7 <br />