ENV3104 Hydraulics II XXXXXXXXXXAssignment 1 1 Assignment 1 Gradually Varied Flow Profiles and Numerical Solution of the Kinematic Equations Examiner Marks out of Weighting (%) Due date Kamrun Nahar...

1 answer below »
Please go through requirement first and quote


ENV3104 Hydraulics II 2022 Assignment 1 1 Assignment 1 Gradually Varied Flow Profiles and Numerical Solution of the Kinematic Equations Examiner Marks out of Weighting (%) Due date Kamrun Nahar 250 25 14th April 2022 Objectives ✓ Evaluate and apply the equations available for the description of open channel flow ✓ Solve the equations governing both steady and unsteady gradually varied channel flow and apply them to the solution of practical flow problems including: backwater profiles; runoff on a plane surface and routing of a stream hydrograph; design erodible and vegetative lined channels. Rationale This assignment is based on the material covered in this course. As such you will be directed to attempt tutorial questions from modules 1-5 before starting the second question of this assignment. Important Information Before starting please review the USQ’s Academic Integrity Policy and Procedure: “All assessable work in a course is to be the individual student’s own work, unless advised otherwise in the Course Specification. It is unacceptable for students to share solutions to assessable work on this Study Desk site, or in any other manner. Violations of this principle are regarded as Academic Misconduct and will be dealt with under the USQ Academic Regulations." For guidance on what constitutes Academic Misconduct and its various categories, at USQ refer to the USQ Student Academic Misconduct Policy available at: http://policy.usq.edu.au/documents/13752PL By submitting this assignment you hereby certify that: The submission is entirely my own work except where due acknowledgement is made in the text and that no part has been copied from any other person’s work. http://policy.usq.edu.au/documents/13752PL ENV3104 Hydraulics II 2022 Assignment 1 2 Special Instructions ✓ Spreadsheets or computer programs must be the work of the individual student. ✓ Assignments submitted without adequate proof of program validation will not be eligible for greater than a C grading. ✓ A proportion of the marks is allocated to the communication aspects of the assignment. Marks will be deducted for untidy and poorly presented work, poor English expression, and failure to cite sources of information. ✓ Plagiarism is taken seriously in this course, as such your assignment report will be checked using Turnitin and your spreadsheets will be checked thoroughly. Instructions for Submission Submission for this assignment is in two parts: ✓ Report introducing the problem, providing background in all relevant theory, descriptions of methods and equations used and discussion of results. ✓ Electronic copy of all computer code or spreadsheets used so the examiner can validate the models. The report should be compiled in such a manner that assessment can be completed without access to the electronic copies of the code/spreadsheet files. It is normal practice to include technical details (e.g. computer code) as an appendix. The assignment is to be submitted electronically via study desk. The link is available on the course study desk. Please note that hand written equations within the body of the report are permitted. In many cases they are preferred as they are simpler to produce and easier to read than poorly set out computer produced equations. Late Submissions If students submit assignments after the due date without (prior) approval of the examiner then a penalty of 5% of the total marks gained by the student for the assignment may apply for each working day late up to ten working days at which time a mark of zero may be recorded. No assignments will be accepted after feedback files have been posted Assessment Task This assignment is comprised of two questions with the marks allocated as follows Question 1 – Gradually Varied Flow Profile 70 marks Question 2 – Kinematic Wave Model 180 marks ENV3104 Hydraulics II 2022 Assignment 1 3 Question 1 – Gradually Varied Flow Profiles The water flows in a triangular channel shown in Figure 1 with a side slope 1 (Hor.): 2.5 (Ver.) and manning roughness coefficient of 0.04. The downstream end of this channel is a channel of same cross section but of much higher slope. The sudden change in slope means that the depth at the downstream end of the channel of interest can be approximated as critical depth. Take alpha as being 1.1 (α=1.1). The channel is conveying a steady flow rate of ? = ( 1 0.2 + 1.5 × ?1) m 3/s The bed slope of the channel is ?? = ( 1 1000 + 0.0001 × ?2) Where, ??is the second last digit and ?? is the last digit in your student number. For example, if your student number is 105007675 then ? = ( 1 0.2 + 1.5 × 7) = 15.5 m3/s ?? = ( 1 1000 + 0.0001 × 5) = 0.0015 Figure 1: Long prismatic channel of triangular cross section ENV3104 Hydraulics II 2022 Assignment 1 4 Your task: a) Use the direct step method, and the equation below to compute the water surface profile upstream of the change in slope. where b) Plot the water depth against distance. c) Plot the longitudinal bed, normal depth, critical depth, water surface and energy line over the length of this profile. (All on the same set of axis e.g. Fig 5.22 Chadwick, scanned copy of this page in provided on study desk) d) Include sample hand calculation in the report Hints: ✓ The size of the step is up to you. ✓ Use of computers for this task (Excel, Matlab, etc is encouraged) Marking Scheme for Question 1 Marks ✓ Initial Calculations Initial calculations to classify the gradually varied profile and help set up the direct step method 20 ✓ Direct step Method The method implemented correctly 20 ✓ Plots of profile Plots are shown correctly 20 ✓ Sample Calculations Showing sample calculation for at least one row of the table 10 Total 70 0 2 1 f R S Sy x F − =  − R V F g y  = ENV3104 Hydraulics II 2022 Assignment 1 5 Question 2 – Kinematic Wave Model Background You have been contracted to investigate the behaviour of a large car park when subjected to a short duration high intensity storm rainfall event. As a first step you have decided to develop a computer simulation of the water depths and flow rates when subjected to a specified rainfall pattern. After making some reasonable assumptions you have decided that the kinematic wave approximation is sufficient for this task The Car Park For study purposes it has been deemed sufficient to represent the behaviour of the car park with a one-dimensional hydraulic model, in effect reducing the two-dimensional car park to a unit flow width running down the predominant slope direction. The specifications are as follows: The length of the carpark area is determined by the last digit of your student number: ? = 120 + (5 × ?????) For example, if your student number was 105007675 ? = 120 + (5 × 5) = 145 m Manning’s n = based on your research (assume a constant value of Manning’s roughness n across the carpark. You should justify your choice) Field Slope = Drop of 0.12 m over length L Freely draining at downstream end. ENV3104 Hydraulics II 2022 Assignment 1 6 The design inflow The model will be used to investigate the behaviour of the field when subjected to an extreme rainfall event. An example of such event is given below in Figure 2. Figure 2 – Example of Rainfall Hyetograph Note: For simplicity it will be assumed that the car
Answered 17 days AfterMar 27, 2022

Answer To: ENV3104 Hydraulics II XXXXXXXXXXAssignment 1 1 Assignment 1 Gradually Varied Flow Profiles and...

Ishwar answered on Apr 12 2022
92 Votes
Assignment 1
Student Name
Student ID
Introduction and background, a description of the problem:
The wat
er flows in a triangular channel shown in Figure 1 with a side slope 1 (Hor.): 2.5 (Ver.) and manning roughness coefficient of 0.04. The downstream end of this channel is a channel of same cross section but of much higher slope. The sudden change in slope means that the depth at the downstream end of the channel of interest can be approximated as critical depth. Take alpha as being 1.1 (α=1.1). Use the direct step method and the equation below to compute the water surface profile upstream of the change in slope.
Figure: Long prismatic channel of triangular cross section
Answer: 1 gradually varied flow profiles
a. Direct step method :
Manning roughness co-efficient = 0.04
Side slope (n) = 1(H): 2.5 (V) =
Normal depth:
Steady flow rate: = 11
Bed slope of the channel
Wetted area A =
Wetted perimeter (P) =
Critical depth:
m
Normal depth Y = 2.5
that means “M-Profile” curve.
(b)
Calculation:
    y(m)
    A(m^2)
    V (m/s)
    Fr
    1-(Fr)^2
    E(m)
    delta...
SOLUTION.PDF

Answer To This Question Is Available To Download

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here