16.1.21 Rework Example 16.1.6 for a 5-ft curb-opening inlet. 16.1.6 Rework problem 16.1.5 for a 25-year storm. 16.1.5 Determine the peak runoff from 500 ft of pavement (32 ft wide) that drains toward a gutter (for a 10-year frequency storm) in Phoenix, AZ. The pavement slope is 0.005, n = 0.016, and C=0.9.

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5. A new highway needs to withstand a storm with a rainfall intensity of 75 mm/h. The section of highway to be drained is 10m wide and 500m long. The drainage channel available to this highway is 0.75 m wide and 0.5 m deep with a roughness value of n = 0.03. What is the minimum slope the channel need to be to drain the highway effectively?

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a paved lot that is 150m by 150m sloped in one direction at a rate of 2% has the time of concentration of 6minutes and a five year storm with duration of 6minutes with an intensity of 12mm per hour.the runoff coefficient for this parking lot is 0.83. a.using rational method determine the amount of runoff that would occur for the parking lot  b.the runoff from part a be contained in a trapezoidal drainage ditch with the following properties  side slope=2m horizontal for every 1m rise width of invert=2m longitudinal slope=0.006m/m roughness coeffiecient =o.070 if the maximum permitted depth of water is 100mm which gives a cross section area of flow=0.22m^2 and a wetted perimeter 0f 2.4 using manning s equation for open channel flow,determine if the ditch will be able to accomodate the flow in part a

Runoff on a 0.5-hectare parking lot flows toward a low area and then toward a street drain. This flow pattern yields concentrated flow with a width of roughly 1.75 m (you can assume rectangular flow cross section) and a slope of 0.2%. The surface of the parking lot provides a Manning’s roughness of 0.020. If a storm with an average intensity of 2.00 cm/hr passes over the parking lot, how deep will the concentrated flow be? You may assume that the vast majority of rainfall reaching the parking lot will become runoff and that storm duration is sufficiently long to allow all parts of the parking lot to contribute to runoff.

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Problem 1: A new building site is very flat and, to avoid excessive excava- tion and possibly the need to pump, the sewers are to be designed for the minimum grades possible while still achieving a self- cleansing velocity of 0.65 m/s at peak flow. At the beginning of the development the flow is estimated to be 10 1/s at daily peak and, in the future, this will rise to 40 1/s. Assume k, 0.6 mm and determine an acceptable pipe size and grade.

1. (. .. .*) Calculate the peak runoff, cfs, for a 10-year storm using the rational method located in Columbus Ohio Area=150 Acres Unimproved Area with 10% slope