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.
05300000 - streamflow gaging station
1-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1911 - 2004 - time period
47 - non-zero values
22 - zero values
25 - years with missing values (not used)
1.000 2.200 5.900 3.400 2.600
6.000 1.500 2.000 0.500 8.900
1.400 5.800 4.800 0.300 4.800
13.000 0.200 0.300 2.700 0.200
2.000 1.600 3.300 6.400 9.400
0.080 0.030 0.380 1.300 6.400
0.450 0.010 0.600 0.090 3.400
25.000 1.100 15.000 15.000 68.000
25.000 44.000 12.000 19.000 1.800
2.500 0.030
The following 7 statistics are based on non-zero values:
Mean (logs) 0.279
Variance (logs) 0.733
Standard Deviation (logs) 0.856
Skewness (logs) -0.658
Standard Error of Skewness (logs) 0.347
Serial Correlation Coefficient (logs) 0.374
Coefficient of Variation (logs) 3.073
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 0.008 0.3257 0.000
0.0200 50.00 0.017 0.3325 0.000
0.0500 20.00 0.054 0.3529 0.000
0.1000 10.00 0.138 0.3870 0.000
0.2000 5.00 0.397 0.4551 0.000
0.5000 2.00 2.354 0.6594 0.633
0.8000 1.25 10.285 0.8638 6.312
0.9000 1.11 19.844 0.9319 14.589
0.9600 1.04 36.901 0.9728 29.675
0.9800 1.02 52.826 0.9864 44.096
0.9900 1.01 71.015 0.9932 61.830
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.
05300000 - streamflow gaging station
7-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1911 - 2004 - time period
52 - non-zero values
17 - zero values
25 - years with missing values (not used)
1.000 2.400 6.500 3.657 2.657
7.571 1.743 2.343 0.571 9.729
1.571 6.029 5.029 0.914 4.871
14.286 0.200 0.300 2.700 0.200
8.186 0.157 0.071 1.600 5.286
6.929 10.000 0.400 0.006 0.040
0.994 1.514 6.929 0.887 0.259
1.206 0.343 0.044 5.957 28.286
0.060 1.657 17.429 15.429 72.143
25.000 45.000 15.000 23.000 2.200
2.986 0.053
The following 7 statistics are based on non-zero values:
Mean (logs) 0.257
Variance (logs) 0.787
Standard Deviation (logs) 0.887
Skewness (logs) -0.635
Standard Error of Skewness (logs) 0.330
Serial Correlation Coefficient (logs) 0.356
Coefficient of Variation (logs) 3.447
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 0.006 0.2539 0.000
0.0200 50.00 0.014 0.2614 0.000
0.0500 20.00 0.045 0.2841 0.000
0.1000 10.00 0.119 0.3217 0.000
0.2000 5.00 0.356 0.3971 0.000
0.5000 2.00 2.242 0.6232 0.916
0.8000 1.25 10.420 0.8493 7.299
0.9000 1.11 20.753 0.9246 16.567
0.9600 1.04 39.896 0.9699 33.593
0.9800 1.02 58.331 0.9849 50.642
0.9900 1.01 79.893 0.9925 72.085
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.
05300000 - streamflow gaging station
30-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1911 - 2004 - time period
56 - non-zero values
13 - zero values
25 - years with missing values (not used)
1.200 0.027 4.657 7.833 4.087
2.740 11.517 2.593 2.673 0.727
0.063 11.083 2.237 8.400 5.140
1.703 5.363 17.767 0.687 0.357
0.577 2.797 0.547 11.983 0.657
0.347 1.600 12.433 7.473 10.833
1.289 0.368 0.272 1.975 2.453
8.393 2.617 1.078 2.151 1.292
3.697 25.743 40.167 2.033 0.668
5.540 27.600 16.633 80.300 25.700
51.500 16.833 42.767 5.403 5.473
0.843
The following 7 statistics are based on non-zero values:
Mean (logs) 0.498
Variance (logs) 0.507
Standard Deviation (logs) 0.712
Skewness (logs) -0.414
Standard Error of Skewness (logs) 0.319
Serial Correlation Coefficient (logs) 0.379
Coefficient of Variation (logs) 1.429
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 0.042 0.1965 0.000
0.0200 50.00 0.076 0.2046 0.000
0.0500 20.00 0.177 0.2290 0.000
0.1000 10.00 0.363 0.2696 0.000
0.2000 5.00 0.827 0.3507 0.055
0.5000 2.00 3.528 0.5942 2.152
0.8000 1.25 12.816 0.8377 10.313
0.9000 1.11 23.658 0.9188 20.520
0.9600 1.04 43.499 0.9675 38.430
0.9800 1.02 62.948 0.9838 56.710
0.9900 1.01 86.412 0.9919 80.285
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.