Chapter 13, Problem 13.6QPP

Question 1 A pipeline 30 m long connects two tanks which have a difference of water level of 12 m. The first 10 m of pipeline from the upper tank is of 40 mm diameter and the next 20 m is of 60 mm diameter. At the change of section, a valve is fitted. Calculate the rate of flow when the valve is fully opened assuming that its resistance is negligible and that f for both pipes is 0.0054. In order to restrict the flow the valve is then partially closed. If k for the valve is now 5.6, find the percentage reduction in flow. Note the following Reservoir I Segment of Length Pipeline B Diameter (m) (mm) ABC AB 10 40 BC 20 60 Head loss due to friction h₁ = KQ² Valve fl K = 3.028D' Where, •h₂ = k Head loss due to partial closure (VAB-VBC) 2g Reservoir 2 H-12 m

Civil engineering students performed an evaluation of the two primary methods of classification (supervised and unsupervised). The evaluation of the two methods utilized the error matrices. Tables 1 and 2 represent supervised and unsupervised methods respectively. Reference Data Bare Agriculture Buildings Forest land Agriculture 130 8 44 48 Classified Data Buildings 12 162 10 16 Forest 0 22 170 38 Bare land 8 14 6 180 Table 1 Results of supervised classification 252 + Reference Data Bare Agriculture Buildings Forest land Agriculture 60 16 44 48 Classified Data Buildings 13 80 22 16 Forest 2 35 120 38 Bare land 8 14 6 180 Table 2 Results of unsupervised classification Compare the two methods based on the following parameters: a. User accuracy b. Producer accuracy c. Overall accuracy. d. Explain the above parameters (a, b & c) e. Which one of the two methods has higher accuracy? Justify your answer

The following figure shows the cross-section of an anchored sheet pile wall. The soil properties and some wall dimensions are shown in the figure and spacing between anchor rods is 2.0 m (center to center). Design the wall using Rankine theory; i.e., calculate the depth of embedment of the wall (D), tensile force on each rod

Q2: A circular concrete culvert of diameter 120 cm carries water of depth 75 cm to irrigate a 30-hectare field. What could be the discharge of this canal if the slope was 0.002? Use Manning's n= 0.014. TWO

A farm of 40 hectares is supplied by open field drains. The spacing of these drains were selected to be 100m and the length of each drain is 600 m. If the drainage coefficient is 4 cm/day, find: 1- Discharge at the end of a field drain. 2- Total discharge passed through the collector drain. 3- The dimension of open drains, if n= 0.03, S= 0.00035 and Z= 1.5

Please use stiffness matrix method to solve.

Please answer using the stiffness matrix method

F U₁ ΕΙ ΕΙ H F₁₂ U₂ ΕΙ EI H F ΕΙ ΕΙ H Undeformed Configuration 3 Deformed Configuration

Civil engineering quantities question  Answer the question and at the end put notes on how a BOQ is constructed.