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WRM721S - WATER RESOURCES MANAGEMENT - 1ST OPP- NOV 2022 |
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nAmlBIA unlVERSITY
OF SCIEnCE Ano TECHnOLOGY
FACULTYOF HEALTH,NATURAL RESOURCESAND APPLIEDSCIENCES
DEPARTMENT OF AGRICULTURE AND NATURAL RESOURCESSCIENCES
QUALIFICATION: BACHELOR OF SCIENCE IN AGRICULTURE
QUALIFICATION CODE: 07BAGA
LEVEL: NQF Level 7
COURSE CODE: WRM721S
COURSE NAME: WATER RESOURCESMANAGEMENT
DATE: NOVEMBER 2022
DURATION: 3 HOURS
MARKS: 100
FIRSTOPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER:
DR HIMA R. AMWELE
MODERATOR: PROF DAMAS MASHAURI
INSTRUCTIONS
1. Answer all questions
2. Number the answers clearly
3. Report all your answers to the correct significant figures
4. Calculator
THIS QUESTION PAPER CONSISTS OF 2 PAGES (Excluding this front page)
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Question 1
1.2 What are the two ways that characterized the source of water pollution give an example
of each?
(4)
1.3 Differentiate between point and non-point sources of pollution and give 2 examples of
each?
{8)
Question 2
What are the 3 biological contaminants that occurs in water and give 2 examples of diseases
resulting from each.
(9)
Question 3
Assume as the size of the roof-top is 10m by 50m, the total amount of rainfall in the area is
600mm per annum and the runoff coefficient is 0.9. Calculate how many litters of water will
be harvested per year.
(5)
Question 4
Calculate the livestock drinking water quality index by using water value, assigned weight
and livestock standard for drink water as indicated in the table below. Please interpret the
answer.
{30)
Water Assigned Livestock
Parameter
Unit Value Weight Standard
pH
7.6
2.7
10
Conductivity
mS/m 260.0 2.9
1000
TDS {determined)
mg/I 1748 4.6
1000
Turbidity
NTU 0.60 2.9
30
Sulphate as SO4
mg/I 822 3.3
125
Chloride as Cl
mg/I 144 4.5
15000
Fluoride as F
mg/I 9.8
2
2
Nitrate as N
mg/I 0.5
2.57
11
Nitrite as N
mg/I 0.1
2
10
T-Alkalinity as CaCO3
mg/I 310 2.5
500
T-Hardness as CaCO3,cal.
mg/I 101 2
100
Calcium as Ca
mg/I 34
2
1000
Magnesium as Mg
mg/I 4.0
2
2
Sodium as Na
mg/I 510 2.5
400
Potassium as K
mg/I 47
2
20
Iron as Fe
mg/I 1.5
1
0.3
Manganese as Mn
mg/I 0.03 2
2
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Question 5
What characteristics do you monitor when determining the quality?
(3)
Question 6
6.1 Water is water pollution?
(3)
6.2 What are the two ways that characterized the source of water pollution give an example
of each?
(4)
Question 7
Explain impact of physical parameter and their measures as follows.
7.1 Dissolved Oxygen
(6)
7.2 pH
(6)
[12]
Question 8
Give 7 methods of Water Conservation.
(5)
Question 9
Answer the following statement whether they are true or false.
9.1 The governmental role is to create a framework in which management, determination of
the politics, planning, waters distribution, monitoring, law application, and solving of conflicts
should occur.
(2)
9.2 The governments have to create conditions so that all acting persons who are interested
in the problems of water resources use and their conservation are allowed to participate in
the process of their solving and to make contracts for achievement of suitable solutions for
all.
(2)
9.3 In the present conditions of free market economy, the local communities must play the
reduced role of deliverance of services and to concentrate more efforts on its role of
regulator and control on the deliverance of the specialized services.
(2)
9.4 Government and their members are frequently involved in water resource management
and conservation activities.
(2)
[8]
Question 10
What are the main economical tools of IWRM and why are they necessary?
(6)
Total: .........................................................................................................................................(100]
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