1. (70 MARKS) An area of highway as shown below enters a conveyance system that runs between A and B. The minimum invert possible at location B is 27 m above datum. The average rainfall intensity is 65 mm/hour. GL = ground level (in meters above datum) i) ii) 12 m 20 GL=30 180 m Jar GL 30 Highway a) Calculate total inflow to the conveyance system. b) Use appropriate calculations to design the conveyance system from A to B as: GL = 29 1m GL = 29 Swale cross section (Not to scale) 100 m A single pipe. (25 MARKS) A shallow grass lined swale with cross section as shown in Figure 100. Assume the water depth in the swale is 100 mm. What is the required longitudinal gradient? (25 MARKS) B (5 MARKS)

Solved: 1. (70 MARKS) An area of highway as shown below enters a conveyance sy

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1 70 marks an area of highway as shown below enters a conveyance syste

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1. (70 MARKS) An area of highway as shown below enters a conveyance system that runs between A and B. The minimum invert possible at location B is 27 m above datum. The average rainfall intensity is 65 mm/hour. GL = ground level (in meters above datum) i) ii) 12 m 20 GL=30 180 m Jar GL 30 Highway a) Calculate total inf