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.
04014500 - streamflow gaging station
1-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1929 - 1993 - time period
59 - non-zero values
1 - zero values
5 - years with missing values (not used)
6.000 4.000 6.000 3.000 2.000
10.000 2.000 4.100 9.400 0.400
10.000 2.200 6.700 9.300 12.000
9.600 7.100 12.000 16.000 13.000
13.000 9.600 12.000 22.000 11.000
17.000 6.700 8.300 2.800 1.700
8.300 11.000 13.000 11.000 6.200
13.000 11.000 5.400 19.000 12.000
19.000 18.000 5.700 5.400 23.000
12.000 10.000 9.700 27.000 18.000
9.700 18.000 27.000 5.000 10.000
1.900 9.600 12.000 19.000
The following 7 statistics are based on non-zero values:
Mean (logs) 0.921
Variance (logs) 0.117
Standard Deviation (logs) 0.342
Skewness (logs) -1.374
Standard Error of Skewness (logs) 0.311
Serial Correlation Coefficient (logs) 0.205
Coefficient of Variation (logs) 0.371
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 0.644 0.0265 0.000
0.0200 50.00 1.001 0.0363 0.281
0.0500 20.00 1.821 0.0658 1.386
0.1000 10.00 2.914 0.1150 2.525
0.2000 5.00 4.778 0.2133 4.468
0.5000 2.00 9.934 0.5083 9.774
0.8000 1.25 16.085 0.8033 16.001
0.9000 1.11 19.029 0.9017 18.974
0.9600 1.04 21.616 0.9607 21.580
0.9800 1.02 22.926 0.9803 22.901
0.9900 1.01 23.863 0.9902 23.847
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.
04014500 - streamflow gaging station
7-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1929 - 1993 - time period
59 - non-zero values
1 - zero values
5 - years with missing values (not used)
6.714 5.714 7.143 4.000 2.000
10.143 2.600 4.829 10.714 0.871
11.714 2.743 8.314 10.043 13.714
13.000 10.586 13.000 18.429 13.429
14.429 10.029 14.143 29.143 11.286
17.857 7.400 8.629 2.957 1.729
9.986 13.857 13.286 11.571 6.243
19.143 12.286 5.900 21.857 13.286
20.286 21.857 7.471 5.986 23.571
12.000 11.143 10.243 30.000 24.143
9.771 25.000 27.000 5.000 14.000
2.629 11.071 13.429 19.000
The following 7 statistics are based on non-zero values:
Mean (logs) 0.986
Variance (logs) 0.104
Standard Deviation (logs) 0.322
Skewness (logs) -1.036
Standard Error of Skewness (logs) 0.311
Serial Correlation Coefficient (logs) 0.202
Coefficient of Variation (logs) 0.327
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 1.010 0.0265 0.000
0.0200 50.00 1.451 0.0363 0.517
0.0500 20.00 2.393 0.0658 1.903
0.1000 10.00 3.579 0.1150 3.165
0.2000 5.00 5.533 0.2133 5.216
0.5000 2.00 10.972 0.5083 10.800
0.8000 1.25 18.179 0.8033 18.074
0.9000 1.11 22.209 0.9017 22.134
0.9600 1.04 26.350 0.9607 26.288
0.9800 1.02 28.817 0.9803 28.766
0.9900 1.01 30.841 0.9902 30.806
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.
04014500 - streamflow gaging station
30-day lowflow - lowflow statistic
April 1 - start of season
March 31 - end of season
1929 - 1993 - time period
59 - non-zero values
1 - zero values
5 - years with missing values (not used)
10.633 6.800 14.267 5.700 2.433
11.133 3.463 9.153 12.500 1.943
20.400 13.893 11.867 12.143 21.000
13.933 21.600 19.433 26.133 15.000
14.967 11.540 33.800 31.433 13.833
18.967 10.127 11.580 4.823 2.507
15.800 17.933 17.867 12.500 7.513
41.133 15.400 8.300 34.433 15.900
25.700 29.600 13.920 10.003 25.267
13.533 12.567 15.923 32.133 28.933
9.793 26.333 27.467 5.367 21.433
6.597 13.433 15.867 20.633
The following 7 statistics are based on non-zero values:
Mean (logs) 1.128
Variance (logs) 0.083
Standard Deviation (logs) 0.288
Skewness (logs) -0.957
Standard Error of Skewness (logs) 0.311
Serial Correlation Coefficient (logs) 0.155
Coefficient of Variation (logs) 0.256
Non- Adjusted Non- Adjusted
exceedance Recurrence Estimated exceedance Estimated
Probability Interval Streamflow Probability Streamflow
----------- ----------- --------- ----------- ---------
0.0100 100.00 1.839 0.0265 0.000
0.0200 50.00 2.515 0.0363 1.035
0.0500 20.00 3.883 0.0658 3.183
0.1000 10.00 5.518 0.1150 4.957
0.2000 5.00 8.095 0.2133 7.685
0.5000 2.00 14.906 0.5083 14.696
0.8000 1.25 23.655 0.8033 23.529
0.9000 1.11 28.549 0.9017 28.459
0.9600 1.04 33.651 0.9607 33.573
0.9800 1.02 36.752 0.9803 36.687
0.9900 1.01 39.348 0.9902 39.302
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.