Country= U.S.A. Station= NATIONAL CANYON NR SUPAI River= COLORADO R Area= 38873600.99 Lat= 36.26 Lon= -112.89 Source= USGS PointID= 9404120 Area Units= km2 Discharge Units= m3/sec Starting Year= 1957 Ending Year= 1995 Total Years= 39 Total Usable Years= 19 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1957 91.41 143.13 223.16 299.33 242.69 302.75 356.7 326.3 269.23 211.7 349.22 442.57 271.52 1958 579.04 265.98 578.4 593.62 427.17 343.67 358.35 333.23 286.07 258.05 265.69 324.91 384.52 1959 288.19 278.82 272.41 345.37 283.61 314.83 371.59 350.22 283.34 230.37 171.2 179.76 280.81 1960 183.98 197.75 296.84 332.44 274.2 331.4 368.4 328.48 260.54 190.82 163.1 128.53 254.71 1961 150.58 188.58 288.49 288.87 269.71 317.33 325.65 270.42 235.62 166.28 124.26 76.48 225.19 1962 132.82 148.17 262.43 304.83 262.33 294.2 328.48 303.92 248.37 179.57 176.47 112.89 229.54 1963 136.23 187.09 267.87 276.94 258.55 324.52 347.02 312.87 252.06 181.54 136.9 119.5 233.42 1964 130.26 185.4 233.18 258.72 220.42 266.25 313.2 291.06 228.48 151.11 110.57 95.57 207.02 1965 110.8 168.7 238.3 243.54 232.19 264.47 312.65 317.95 226.71 151.28 95.46 86.98 204.09 1966 79.28 171.33 221 278.05 251.27 292.56 330.49 315.1 221.86 149.72 104.32 126.57 211.8 1967 125.28 181.17 263.7 245.66 248.95 271.47 303.46 290.31 192.15 171.43 102.46 63.38 204.95 1968 143.01 179.95 256.13 280.56 235.95 269.38 279.01 260.82 221.4 164.75 121.72 123.34 211.34 1969 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1970 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1971 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1972 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1973 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1974 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1975 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1976 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1977 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1978 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1979 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1980 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1981 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1982 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1983 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1984 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1985 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1986 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1987 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1988 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1989 113.82 182.37 263.86 341.99 255.55 249 296.94 261.37 239.89 195.18 124.54 116.31 220.07 1990 112.98 177.29 246.84 306.45 282.29 289.07 299.84 261.52 204.48 168.66 130.04 120.56 216.67 1991 102.34 170.51 193.64 292.85 263.59 284.8 300.07 238.37 195.11 206.22 143.17 67.21 204.82 1992 108.84 134.17 182.81 232.54 208.6 239.53 263.44 199.81 181.47 188.96 147.69 94.8 181.89 1993 62.69 79.76 197.71 245.99 226.14 223.91 214.62 199.52 180.71 173.88 111.96 127.55 170.37 1994 132.4 163.63 259.66 315.01 263.92 285.31 286.49 254.41 204.09 182.16 128.47 89.76 213.78 1995 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 154.66 177.99 263.69 304.6 261.51 286.91 314.24 284.2 229.53 184.54 150.4 138.7 229.25 Std Dev 113.04 42.59 82.34 77.42 45.04 31.44 38.72 42.78 31.9 27.51 61.42 92.7 46.17