This document discusses various public utility systems in Nigeria including drainage systems, fire services, and power supply. For drainage systems, it provides details on the components of an efficient system, including road surface drainage, side drains, catch-water drains, culverts, and bridges. It notes that proper drainage is essential to allow water to flow off roads quickly. Ensuring good drainage also involves selecting optimal road alignments. The document then addresses issues with Nigeria's drainage systems and why drainage is considered a public utility. It moves on to discuss challenges facing Nigeria's fire services and the benefits of well-functioning fire department utilities. The final sections cover power supply issues in Nigeria like spending on generators and high

1. EHS 415: PUBLIC
UTILITIES
AND
ENVIRONMENTAL ISSUES
Lecturer: Ms. Olulegan

4. POWER SUPPLY
FIRE SERVICES
DRAINAGE SYSTEMS

5. DRAINAGE SYSTEMS

10. A drainage system
in urban and
industrial areas is a
facility to dispose of
liquid waste.
DEFINITION

11. Today’s drainage systems
must cost-effectively
manage flooding, control
stream bank erosion, and
protect water quality.
NUGGETS

12. Water is the main
contributor to the
wear and damage of
low-volume rural
roads.

13. The water can be in the
form of ground water,
surface water (streams
and rivers) or rain and it
can damage the road in
several ways:

14. By washing away the
soil (erosion
and scouring)

15. By making the road body
less resistant to traffic (i.e.
weakening the load
bearing capacity)

16. By depositing soils
(silting) which may
obstruct the passage of
water

17. By washing away
entire sections of the
road or its structures

18. BRACE UP!
PAGE
There
is
A
DIAGRAM
IN THE NEXT

20. An efficient drainage system
is therefore essential to allow
water to flow off and away
from the road as quickly as
possible.

21. THIS IS ACHIEVED BY A SYSTEM
CONSISTING OF THE FOLLOWING
COMPONENTS:

22. Road surface
drainage which
enables the water to
flow off the road
surface

23. Side drains which
collect and lead the
water away from
the road

24. Road embankments in
flood prone terrain,
lifting the road surface
well above the highest
flood levels

25. Catch-water drains
which catch surface
water before it
reaches the road

26. Scour checks,
preventing erosion
in the ditches by
slowing down the flow
of the water

27. Culverts which lead the
water from the side
drains under the road to
the other (lower) side

28. Bridges and drifts which
allows the road to cross
rivers and streams in a
controlled manner
throughout the seasons.

29. In addition, different
arrangements may be
required for drainage of
high water tables to lower
the levels of underground
water.

30. BRACE UP!
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There
is
A
DIAGRAM
IN THE NEXT

32. Ensuring good
drainage begins
when selecting the
road alignment.

33. A major concern when
designing and installing
culverts is to minimize the
wear and tear the water being
drained away from the road
may have on the culvert and
the adjoining road sections.

34. For this reason, the
location, dimensions and
choice of inlet and outlet
arrangements play an
important role when
choosing the optimal
design solutions.

35. TYPES OF DRAINAGE
SYSTEMS

40. WHAT A GOOD
DRAINAGE SYSTEM
SHOULD LOOK LIKE:

41. BRACE UP!
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There
is
A
DIAGRAM
IN THE NEXT

47. PROPER DRAINAGE
SYSTEM
hat’s the
essence of a
W

48. WHAT THEN IS
WRONG WITH ALL
OUR NIGERIAN
DRAINAGE SYSTEMS?

49. Why
IS THE
TERMED AS A PUBLIC
UTILITY?
DRAINAGE
SYSTEM

50. FIRE SERVICES

51. SEE VIDEO
ON
“FIRE SERVICES”
THE CORPORATE FILM: THE CITY FIRE SERVICE

52. KWASU

58. What problems
are facing the
fire services in
Nigeria?

59. Highlight the
benefits of having
well functioning fire
services’ utilities in
Nigeria.

60. How can we
remedy the fire
services utilities
in Nigeria?

61. The
privatization of
public utilities in
Nigeria

62. POWER SUPPLY

63. NUGGETS ON ENERGY:

64. Global fundamentals

65. Residential/commercial

66. Industrial

67. Electricity generation

68. Transportation

69. Supply

70. Nigeria spends about $13
billion (about N1.95
trillion) every year to
provide electricity from
generators.
- President Johnathan,
October 2010

71. Currently, there are about 60
million generators in Nigeria at
the ratio of one per household of
2.5 people with an annual
spending of N1.6 trillion,”
-Dr Kabir Usman, September
2012
(Director-General of Centre for
Management Development)

72. He also said that the poorest
Nigerians paid more than
N80/kwh burning candles,
kerosene and firewood while
manufacturers paid between N45
and N60/kwh on diesel to run
their generators.
-Dr Kabir Usman, September 2012
(Director-General of Centre for
Management Development)

73. ASSIGNMENT

74. Split yourselves into 4
groups and discuss the
causes and remedy to the
problem of power supply in
Nigeria.
List out your points.