In the table below annual rainfalls of gage A, B, C and D are given. Gage D was permanently relocated after a period of 5 yr (at the end of 1989); thus adjust the recorded values from 1985 through 1989 of gage D using double mass curve assume the data for the other gages are consistent.

Question 2 3 pts Estimate the total excess/effective rainfall in mm for a 5% AEP storm. The temporal pattern distribution (in %) for a 45-min rainfall duration (5-min time step) for a South Australian catchment is given below. 13.18 9.3 9.3 13.18 20.93 13.95 13.18 20.93 13.95 4.65 8.53 6.98 Consider: Total rainfall depth = 26.2 mm IL = 7.8 mm and CL = 2.6 mm/hr Give your answer to two decimal places. Note: When presenting your answers, round your answer as instructed, but for your calculation, use as many decimal places as you have to avoid rounding errors.

Conduct a single-station flood-frequency analysis on annual flood peaks of a small stream as given below has acoefficient of skewness equal to zero. Do all necessary steps for conducting such an analysis including the use of theWeibull plotting positions. Based on the single-station flood-frequency analysis plot, determine the return period of100 cfs flood peak. Also, obtain the flood peaks for return periods of 10-year and 5-year.  Year 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993Annual Flood Peak (cfs) 300 60 80 100 40 800 400 30 700 80

6- Maximum annual rainfall depth data are fitted with a distribution that is positively skewed (i.e., it has a longer tail to the right). If the mean value for the distribution is 4.22 in, then the rainfall depth with return period 2 years will be (use the next page table): (5 p) (A) Strictly less than 4.22 in (B) Equal to 4.22 in (C) Strictly larger than 4.22 in (D) None of the above