Question

5. The drainage channel for a catchment is to be sized for the peak runoff rate resulting from a 20-year rainfall event, and the 20-year IDF curve is given by \(i = \frac{170}{(t + 8.7)^{0.75}} cm/h\) The surface of the 2.5ha catchment is covered with dense shrubbery. The catchment has a runoff coefficient estimated to be 0.5, an average overland-flow length of 80m, and an average slope of 0.6%. Assuming flow over the surface of the catchment is sheet flow, determine the peak runoff rate in m³/s using the rational method.

          5. The drainage channel for a catchment is to be sized for the peak runoff rate resulting from a 20-year
rainfall event, and the 20-year IDF curve is given by
\(i = \frac{170}{(t + 8.7)^{0.75}} cm/h\)
The surface of the 2.5ha catchment is covered with dense shrubbery. The catchment has a runoff
coefficient estimated to be 0.5, an average overland-flow length of 80m, and an average slope of 0.6%.
Assuming flow over the surface of the catchment is sheet flow, determine the peak runoff rate in m³/s
using the rational method.

5. The drainage channel for a catchment is to be sized for the peak runoff rate resulting from a 20-year
rainfall event, and the 20-year IDF curve is given by
i = (170)/((t + 8.7)^0.75) cm/h
The surface of the 2.5ha catchment is covered with dense shrubbery. The catchment has a runoff
coefficient estimated to be 0.5, an average overland-flow length of 80m, and an average slope of 0.6%.
Assuming flow over the surface of the catchment is sheet flow, determine the peak runoff rate in m³/s
using the rational method.

Added by Yesenia R.

Question

Please give Ace some feedback