CIV E 445 - APPLIED HYDROLOGY
SPRING 2014
LAB No. 8

  1. Given the following series of annual maxima, in cfs:

    1305, 3250, 4735, 5210, 4210, 2120, 2830, 3585, 7205, 1930, 2520, 3250, 5105, 4830, 2020, 2530, 3825, 3500, 2970, 1215.

    • Calculate the plotting positions using the Gringorten formula (Eq. 6-43 of the text).

    • Construct a Gumbel paper (see Fig. 6-6 of the text).

    • Plot the plotting positions on the Gumbel paper.

    • Calculate the Gumbel fit to the given data.

    • Plot the Gumbel fit on the Gumbel paper.

    • Verify your results using ONLINE GUMBEL.

    • What is the mean of the absolute value of the difference between hand-calculated and online [flood] results?