A 76-year peak annual flow series for USGS gage 08110500 on the Navasota River Easterly in...

A 76-year peak annual flow series for USGS gage 08110500 on the Navasota River Easterly in south central Texas is provided below.

(a) Plot the flows on normal probability paper using the weibull plotting position formula. Estimate the 10-year recurrence interval discharge from your plot.

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(b) Estimate the 10-year and 100-year recurrence interval floe using the log-pearson type III probability distribution with a station skew coefficient computed directly from the data

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(c) Repeat part b above using a weighted skew coefficient (GR = −0.28 from Fig.7.3).

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(d) Estimate the 10-year and 100-year recurrence interval flows using the log-normal probability distribution.

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(e) Estimate the 10-year and 100-year recurrence interval flow using the Gumbel distribution

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(f) Compare the 10-year and 100-year peak flows computed using the alternative methods. Which values so you recommend for adoption? why