A trapezoidal channel is lined with rock riprap and has a bottom width of 20 ft, 1.5:1 side slope (horizontal to vertical), a bottom slope of 0.0010 ft/ft, and a Manning n of 0.030. At the end of the canal the flow is critical before it hits an overfall with a spillway structure. Determine the critical and normal depth and sketch the water surface profile. use a discharge of 1500 cfs)

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Time and time related variables in engineering

Time is the event progression starting from past to present and then, future statistically. The time-related variable is any particular value in relation to time to assess its changes on a specified (XY) plane.