Log-Pearson Type III Statistics Notice -- Use of Log-Pearson Type III or Pearson-Type III distributions are for preliminary computations. User is responsible for assessment and interpretation. 05311000 - streamflow gaging station 1-day lowflow - lowflow statistic April 1 - start of season March 31 - end of season 1910 - 2004 - time period 79 - non-zero values 3 - zero values 13 - years with missing values (not used) 40.000 15.000 73.000 65.000 127.000 110.000 95.000 20.000 27.000 0.500 0.900 5.000 15.000 3.300 15.000 27.000 28.000 120.000 79.000 110.000 7.000 60.000 75.000 50.000 24.000 30.000 125.000 80.000 107.000 82.000 45.000 58.000 290.000 31.000 28.000 71.000 28.000 86.000 86.000 39.000 111.000 96.000 19.000 49.000 31.000 24.000 88.000 279.000 53.000 21.000 71.000 2.900 29.000 56.000 88.000 74.000 59.000 34.000 96.000 172.000 243.000 630.000 36.000 16.000 11.000 42.000 325.000 125.000 355.000 229.000 250.000 105.000 344.000 116.000 220.000 35.000 209.000 172.000 48.000 The following 7 statistics are based on non-zero values: Mean (logs) 1.714 Variance (logs) 0.305 Standard Deviation (logs) 0.552 Skewness (logs) -1.128 Standard Error of Skewness (logs) 0.271 Serial Correlation Coefficient (logs) 0.514 Coefficient of Variation (logs) 0.322 Non- Adjusted Non- Adjusted exceedance Recurrence Estimated exceedance Estimated Probability Interval Streamflow Probability Streamflow ----------- ----------- --------- ----------- --------- 0.0100 100.00 1.001 0.0462 0.000 0.0200 50.00 1.909 0.0559 0.000 0.0500 20.00 4.636 0.0848 1.289 0.1000 10.00 9.421 0.1329 5.803 0.2000 5.00 20.176 0.2293 16.009 0.5000 2.00 65.468 0.5183 61.642 0.8000 1.25 152.054 0.8073 148.841 0.9000 1.11 210.130 0.9037 207.565 0.9600 1.04 274.800 0.9615 272.549 0.9800 1.02 314.915 0.9807 313.040 0.9900 1.01 348.286 0.9904 346.956 Note -- Adjusted parameter values include zero values and correspond with non-exceedance probabilities in column 1 and recurrence interval in column 2. Estimated values in column 3 are based on non-zero values. =============================== Log-Pearson Type III Statistics (based on USGS Program A193) Notice -- Use of Log-Pearson Type III or Pearson-Type III distributions are for preliminary computations. User is responsible for assessment and interpretation. 05311000 - streamflow gaging station 7-day lowflow - lowflow statistic April 1 - start of season March 31 - end of season 1910 - 2004 - time period 80 - non-zero values 2 - zero values 13 - years with missing values (not used) 40.000 15.000 73.000 65.000 127.000 120.286 95.000 20.429 28.571 0.686 1.129 0.029 5.000 16.714 5.500 15.000 29.857 32.857 120.000 95.857 117.143 13.571 62.143 76.429 52.857 53.571 32.714 176.429 81.571 117.000 85.857 45.000 58.000 292.714 31.000 35.714 73.000 29.286 87.571 86.000 39.000 225.143 97.000 19.000 49.857 40.286 30.571 91.571 301.286 53.571 27.429 72.000 3.800 31.429 95.000 95.000 74.000 59.714 39.857 98.429 190.857 331.000 632.857 38.286 16.857 12.857 42.000 339.143 126.143 492.857 230.571 252.857 109.286 357.143 118.571 223.429 37.571 234.143 185.286 54.857 The following 7 statistics are based on non-zero values: Mean (logs) 1.721 Variance (logs) 0.419 Standard Deviation (logs) 0.648 Skewness (logs) -2.101 Standard Error of Skewness (logs) 0.269 Serial Correlation Coefficient (logs) 0.574 Coefficient of Variation (logs) 0.376 Non- Adjusted Non- Adjusted exceedance Recurrence Estimated exceedance Estimated Probability Interval Streamflow Probability Streamflow ----------- ----------- --------- ----------- --------- 0.0100 100.00 0.226 0.0341 0.000 0.0200 50.00 0.655 0.0439 0.000 0.0500 20.00 2.662 0.0732 0.979 0.1000 10.00 7.645 0.1220 4.755 0.2000 5.00 21.775 0.2195 17.662 0.5000 2.00 84.640 0.5122 81.259 0.8000 1.25 164.570 0.8049 163.062 0.9000 1.11 192.312 0.9024 191.565 0.9600 1.04 208.284 0.9610 208.024 0.9800 1.02 213.250 0.9805 213.129 0.9900 1.01 215.576 0.9902 215.518 Note -- Adjusted parameter values include zero values and correspond with non-exceedance probabilities in column 1 and recurrence interval in column 2. Estimated values in column 3 are based on non-zero values. =============================== Log-Pearson Type III Statistics (based on USGS Program A193) Notice -- Use of Log-Pearson Type III or Pearson-Type III distributions are for preliminary computations. User is responsible for assessment and interpretation. 05311000 - streamflow gaging station 30-day lowflow - lowflow statistic April 1 - start of season March 31 - end of season 1910 - 2004 - time period 82 - non-zero values 0 - zero values 13 - years with missing values (not used) 40.000 15.333 76.400 66.667 127.000 127.267 109.833 21.700 35.500 1.387 1.757 0.323 0.100 5.350 0.067 18.300 6.367 16.233 32.167 41.400 193.667 137.333 127.333 19.000 102.500 78.833 75.867 62.233 44.033 211.500 84.433 129.600 97.600 45.900 59.867 326.633 32.900 40.567 77.500 33.133 110.867 87.367 40.633 290.733 99.467 19.867 59.867 49.733 41.733 105.733 357.967 54.667 28.833 92.200 3.920 32.800 98.733 152.200 88.300 62.133 56.000 171.267 326.767 378.967 663.367 43.867 18.733 15.867 43.300 405.433 161.100 516.667 244.467 428.667 118.667 364.000 184.967 234.200 44.400 281.700 241.800 74.200 The following 7 statistics are based on non-zero values: Mean (logs) 1.736 Variance (logs) 0.539 Standard Deviation (logs) 0.734 Skewness (logs) -1.878 Standard Error of Skewness (logs) 0.266 Serial Correlation Coefficient (logs) 0.614 Coefficient of Variation (logs) 0.423 Non-exceedance Recurrence Estimated Probability Interval Streamflow ----------- ---------- --------- 0.0100 100.00 0.137 0.0200 50.00 0.422 0.0500 20.00 1.891 0.1000 10.00 5.926 0.2000 5.00 18.774 0.5000 2.00 89.260 0.8000 1.25 207.510 0.9000 1.11 260.681 0.9600 1.04 298.348 0.9800 1.02 312.748 0.9900 1.01 320.700