5. Draw the sketch of the following cross section of channel and indicate the specified dimensions. a Semi-circular section with radius r = 3.0m b) Rectangular section : b=4.0m, and d = 2.0m C Trapezoidal section : Bottom width b = 3.0m Depth : Side Slope : 2 horizontal to 1 vertical d = 2.0m i. Calculate the area (A), wetted perimeter (P)and the hydraulic radius (R) of each channel. ii. If the discharge of these three channels are equal to 6.0m/s, determine the velocity of water flowing of each channel and identify which channel has the highest value of velocity 2, the lowest value of velocity ?

Q: Define the term coefficient of lateral earth pressure.

A: The coefficient of lateral earth pressure can be defined as it is the ratio of the horizontal…

Q: By the method of coordinates, determine the cross- sectional areas of the sections shown below.…

A: Given : Determine the cross sectional area of the section above and compute the volume of earthwork…

Q: What is the Lateral Clearance “M”, given the following: R = 30 S = 45m

A: Radius r = 30 Distance s = 45m

Area Computations

The area is the mathematical estimation of the inner space occupied by any shape or object and area computation is the evaluation of how much inner space that particular shape or object has utilized. Simple applications include calculating the area of wall for the quantity of paint or plaster to be applied on it, area calculations for construction of a trapezoidal dam and how much material is required, calculating the area of a circle to determine the range or distance of wheels that they are capable of covering due to varied radii and so on.