KIGALI INSTITUTE OF SCIENCE AND TECHNOLOGY
FACULTY OF ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING & ENVIRONMENTAL TECHNOLOGY
END OF SEMESTER II EXAMINATIONS
ACADEMIC YEAR: 2012-2013
EXAMINATION PERIOD:
YEAR OF STUDY:
Programme:
Full Time
II
2 SEMESTER:
SUBJECT CODE & NAME:
NO. OF STUDENTS:
DURATION:2hrs
MAX. MARKS:60
22/03/2013
NAME OF INTERNAL EXAMINER:
TEL:
Part
√ Time
WEE 3222: OPEN CHANNEL HYDRAULICS
60
DATE OF SUBMISSION:
MAY 2013
UWIMPUHWE Charlotte
E-MAIL:
07828662618
c.uwimpuhwe@kist.ac.rw
SIGNATURE:
Submitted
(i) Syllabus
(ii) Main Exam Qns.(iii) Marking
√
√ scheme
(iv) Supp exam Qns.(v) Marking scheme
Head of Department:
√
√
√
Date:
KIGALI INSTITUTE OF SCIENCE AND TECHNOLOGY
FACULTY OF ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING AND ENVIRONMENTAL TECHNOLOGY
INTERNAL MODERATOR’S REPORT
DETAILS OF MODERATOR
Name of the Moderator:…………MajoroFelicien…………………………………………………………………………………
Designation:……………………………Lecturer……………………………………………………………………………………….
Area of Specialisation:………Hydraulic Engineering…
DETAILS OF MODERATING SUBJECT
Module Code and Title:WEE 3222 OPEN CHANNEL
Year of Study
2: SemII Academic Year: 2012-2013
HYDRAULICS
DETAILS OF MODERATION
Sl.No
DESCRIPTION OF ASSESSMENT
COMMENTS,if any
1.
Coverage of Syllabus
OK
2.
Standard and Level of Question Paper
OK
3.
Allocation /Distribution of Marks
OK
4.
Allocation of Time
OK
5.
Qualitative Treatment (Theory)
OK
6.
Quantitative Treatment (Problem)
OK
7.
Correlation between Qualitative and
Quantitative
OK
Have comments been incorporated in the question paper or marking scheme by the staff? Yes
Signature of Moderator:
Date:
No
INDICATIVE CONTENT
UNIT I FUNDAMENTAL OF OPEN CHANNEL FLOW
 Basic concepts, Types and Regime of Flow, Velocity Distribution in Open Channel, Specific
Energy, Critical Flow; Channel control and transitions
UNIT II UNIFORM AND GRADUALLY-VARIED FLOWS
 Uniform Flow and flow resistance; Manning’s and Chezy’s Formula; Most Economical
Section, Dynamic Equation of Gradually Varied Flow, Characteristics of Flow Profile,
Profile Determination –Graphical Integration, Direct Step, Standard Step Method, Hydraulic
Jump,
UNIT III NUMERICAL MODELING
 Numerical Modelling of un/Steady Open Channel Flows
UNIT IVSEDIMENT TRANSPORT
 Sediment Properties, Observation and analysis, Inception of Sediment Motion, Sediment
Transport Mechanisms, Contact load, Saltation load, Bed load and suspended load.
UNIT V OPEN CHANNEL STRUCTURES
Weirs and Spillway, Drop Structures and Chute drop structure, vertical drop structures, Conveyance
and control structures.
MAIN EXAM
KIGALI INSTITUTE OF SCIENCE AND TECHNOLOGY
Avenue de l'Armée,
B.P. 3900 Kigali,
Rwanda
INSTITUTE EXAMINATIONS-SEM:II
ACADEMIC YEAR 2012-2013
FACULTY OF ENGINEERING
DEPARTMENT: CIVIL
YEAR:
2
ENGINEERING & ENVIRONMENTAL TECHNOLOGY
SEMESTER: II
MODULE:WEE
GROUP:
WEE
3222 OPEN CHANNEL HYDRAULICS
DATE: 07/05/2013
TIME:
2hours
MAXIMUM MARKS =
60
INSTRUCTIONS
1. This paper contains FOUR (4) questions.
2. Answer THREE (3) Questions only:
Question ONE (1) from Section “A” is Compulsory and Answer any TWO (2) from
Section “B”
3. All questions carry equal marks.
4. No written materials allowed.
5. Do not forget to write your Registration Number.
6. Write all your answers in the booklet provided
7. Do not write any answers on this questions paper.
8. Start each question in a NEW page
SECTION: A
Question: 1
[20]
a. Explain how water surface profile is determined.
[4]
b. Differentiate between steady non-uniform flow and unsteady uniform flow.
c. What are the purposes of analyzing sediment in water?
[4]
[4]
d. Describe in brief two structures used to protect downstream part of the weir against
erosion.
[4]
e. Uniform flow of 2m depth is flowing in a lined trapezoidal channel with n = 0.015 and m=
1: 1.5. The channel base width is 2m and its base slope is 1m/1km. Compute the discharge
and mean velocity of the channel. [4]
SECTION: B
Question: 2
[20]
a. A concrete lined circular channel of 3.6m diameter has a bed slope of 1:800. Determine the
velocity and flow rate for the conditions Maximum velocity and Maximum discharge. Use
chezy's formula, with C=56 m1/2.
[16]
b. State four(4) practical applications of the hydraulic jump phenomenon.
[4]
Question: 3
[20]
a. Give four examples of channel transitions and its functions.
[7]
b. Between KIST 2 and 4buildings; a trapezoidal channel has to be constructed to call
discharge of 5m3/s from runoff water. The channel will have bottom width b = 4m, side
slopes 1H: 1V, a bottom slope So = 0.0012 and manning's n = 0.025. The depth of flow will
be decreased to 0.7m in the direction of flow (near the hostel). Name the surface profile
formed.
[13]
Question: 4
[20]
Akagera River is discharge into Victoria Lake with certain amount of sediment. If The River has
the following characteristics, determine the sediments transported as bed load every day:
Data:
Longitudinal bed slope, i = 810-5
Water discharge, QW = 500 m3/s
River width, B = 300 m
Sediment diameter, D50 = Dm = 0.25 mm (fall velocity: S = 0.033 m/s)
Chézy coefficient, C = 56 m1/2
---------------------------------