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Career Episode 3 on CDR Sample 5 Civil Engineer


[CE 3.1]

This part of the career episode contains the working experience of the project, “XXXXXXXXXXXXXXXXXXXXX”. I submitted this project to the Department of Civil and Environmental Engineering at XXXXXXX University on 25th October 2016. I did this project as an academic student, under the strict and proper supervision of a qualified supervisor.


[CE 3.2]

Knowledge of the flow of water in open channels has its extensive importance for the humankind to make the efficient use of water resources. To design the channels for dams and spillways efficiently, the discovery of critical and maximum flow depth is necessary. I came up with the method to discover these important parameters for the design of channels. I adopted several engineering and mathematical methods to design the critical parameters required for the feasible design of channels.

[CE 3.3]

The objectives of this project were as follows -

  • Determination of the location of Critical Depth
  • Determination of the flow depth
  • Development of the MATLAB code for modelling of equation of SVF.

[CE 3.4]

As the project was submitted to the institutional organisation, I was abided by the rules and regulations of the organisation to utilise the rights and responsibilities.
The organisational structure drawn below shows the rank I occupied in the University during the project tenure.

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Fig: An organisational chart that shows my position during the project tenure.

[CE 3.5]

I was assigned with specific duties and responsibilities during the project tenure to assure the fulfilment of objectives.
They were:

  • To analyse the different methods and compute the critical flow depth To perform detailed literature and technological survey
  • using the same
  • To perform a simulation for the accurate value of critical depth and its location
  • To perform tests for rectangular and trapezoidal geometry
  • To compare the results of each analysis


[CE 3.6]

I started the project with a literature survey about the contentions of the project. Firstly,

(ANZSCO 233211: 1)

[CE 3.7]

Afterwards, I analysed the methods to compute the critical flow depth by going through several books and documents (ANZSCO 233211: 1). In order to assess the methods of computation that I had studied, I obtained an abstract channel from a specific book.

The channel data could be mentioned in the table as:

Geometry Rectangular
Channel Length (L) 100 m
Channel Width (B) 5 m
Manning coefficient (n) 0.020
Boussinesq Coefficient (β) 1.30
Bed slope ( S0) 0.15
Lateral Inflow rate (q) 1.75 m3/s/m

Table: Channel Data (Test Case 1)

[CE 3.8]

Trial and Error, the first method was simple and suitable because an approximated profile could be obtained by hand with the use of a calculator. I evaluated the critical depth and its location adopting this method for a given rectangular section (ANZSCO 233211: 1, 7). Thereafter,

to simplify the calculation of critical depth and its location. (ANZSCO 233211: 1, 7)

[CE 3.9]

After that mathematical analysis, I decided to use the MATLAB software to determine the same parameters for analysis. Under this, I developed a MATLAB Execution Flowchart showing the order of behaviours required for the execution of the program and to get the consequences (ANZSCO 233211: 1, 7). It is shown below:
Fig: A sequential flowchart of process involved in MATLAB.

[CE 3.10]

After performing the MATLAB simulation, I proceded to verify the method works that could be used to solve the problems of interest (ANZSCO 233211: 6). In this section,

After performing the MATLAB simulation, I proceded to verify the method works that could be used to solve the problems of interest (ANZSCO 233211: 6). In this section,

Canal bottom width B=5m
100 m
Bed slope S0 = 0.15
Actual discharge Q0 = 8.75 m3/s
Lateral inflow Q = 1.75m3/s/m
Canal length L = 100m
Boussinesq coefficient B = 1.3
Manning coefficient n = 0.020

Table: Canal Data

[CE 3.11]

After the collection of canal data, I obtained the data from literature as:

Xc 43.7m
Yc 3.14m

Table: Critical Depth and Its location obtained from Literature At the same time, I extracted the value of critical depth and its location from the MATLAB program that worked in conjunction with the 4th order Runge-Kutta numerical analysis.

Xc 42.48m
Yc 3.08m

Table: Critical depth and its location obtained from MATLAB.

[CE 3.12]

Next, I moved to perform the test for the trapezoidal section. I repeated the same procedures of obtaining the canal data, and critical depth and its location from literature (ANZSCO 233211: 1). Then, I sited the critical depth and its location using the MATLAB along with the 4th order Runge-Kutta method.
All these data are presented in tables drawn below -

Canal bottom width B=10m
100 m
Bed slope S0 = 0.08
Tangent inv. XS m = 0.5
Lateral inflow Q = 2.5m3/s/m
Canal length L = 100m
Boussinesq coefficient B = 1.2
Manning coefficient n = 0.018

Table: Canal Data

Xc 44.75m
Yc 3.3m

Table: Critical Depth and Its location obtained from Literature.

Xc 72.36m
Yc 33.23m

Table: Critical depth and its location obtained from MATLAB.

[CE 3.13]

I performed one more test for the trapezoidal section using the second set of data for which a lateral discharge rate was 2.0 m3/s/m. I obtained

including the data obtained from the literature. (ANZSCO 233211: 6)

Method Yc (m) Xc (m)
Literature 3.140 43.70
Trial and error 3.136 43.58
Graphical Method 2.900 44.20
Transitional Profile 3.000 40.78
MATLAB code 3.080 42.48

[CE 3.14]

To perform the test for the assurance of the parameters for their accuracy, I needed different parameters to be extracted on MATLAB. I did not have sufficient idea about the input parameters. So, I asked a professional design engineer to sort the input lists. He suggested me to review the document by Subramanya that included all the input parameters required for the project. I went on to implement his ideas to deal with the issue successfully. (ANZSCO 233211: 5)

During the calculation of

deviation was inevitable and satisfactory. (ANZSCO 233211: 5)

[CE 3.15]

I made the efficient use of MATLAB along with the conjunction of fourth order Runge–Kutta Numerical analysis to analyse the accuracy and preciseness of the result obtained from different methods. This strategic move ensured me the value of parameters to be efficient for practical implementation in designing of channels.

[CE 3.16]

I had amazing coordination with the supervisor throughout the project period. I used to have interaction with the supervisor at regular intervals. Moreover, I used to prepare the reports on the progression of the project work to show the status to the supervisor. He looked forward to supervising the present work and give proper suggestions for the accomplishment of the project work. Also,

to resolve the technical issues encountered during the project.

[CE 3.17]

I performed the work of the project under ethics of an engineering profession. I did not violate any rules set the University standard. Moreover, I maintained privacies and compliances of the research articles and documents during literature survey and the extraction of required data. In addition to these, maintained the standard of MATLAB during the simulation of results.

d) Summary:

[CE 3.18]

In order to get to the precise documents for literature survey, I requested the Library Department to procure the sufficient books for the study. I also made consultation with technical experts for the feasibility of the results obtained in practical implementation. On comparison of the results, I found the assured objectives to be fulfilled. The most considerable finding of the project was the utilization of applied mathematics. Similarly, MATLAB worked appropriately in order to simplify the difficult solution of integration of general differential equations, and hence deliver the required result. This

convenient design of canals.

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