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Question 1 determine the headwater depth of a 1000 mm high

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Question 1: Determine the headwater depth of a 1000 mm (high) by 1500mm (wide) concrete box culvert operating under outlet control with a stream flow of 3.0 m3/s. The culvert is 50 m long, K.=0.5 and on a slope of 0.25%. The taihvater depth is 1.1m. What will be the headwater depth if the tail water depth is reduced by 0.8 m?

Question 2: An earthen channel (n=0.03) has a bed width of 5.0 m, a water depth h = 1.5 m, a 45° side slope, and a channel slope of 0.001. Calculate the average velocity in the channel and the discharge. Determine whether erosion will take place if the maximiun permissible flow of water in an earthen channel is 1.5 m/s.

Question 3: The annual precipitation in nun observed on a network of stations is shown below. Compute the average area rainfall by a) the arithmetic average method and b) Thiessen polygon method. Red dots show the rainfall stations and the text shows the rainfall amount in mm for the corresponding station. Blue line shows the river network within the catchment.

Reference no: EM13574270

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