<< Chapter < Page Chapter >> Page >

Geography

Grade 4

Resources and services within a settlement

Module 15

Water supply and water conservation

Water as a resource

Limited supply of water

Water – the smaller the supply of water, the bigger the problem!

To supply water to a city is not an easy task. The location of the first fort at the Cape was determined by the Vars River, because the building had to be erected where water was available. The river (that presently flows beneath Adderley Street in a pipe) is literally “a drop in the ocean” of what the Cape Metropole presently needs. The water for this vast urban area comes from a number of dams in the mountainous regions many kilometres from Cape Town.

To be ensure that water will always be available demands thorough planning – sometimes years ahead! A rapid influx of people will result in the fact that for a certain period there will not be sufficient water for urban use. This is a serious situation because human beings cannot survive without water.

Access to water

Do all South Africans have access to water daily?

Activity 1

To discuss this statement in your groups and propose ways to address the problems [lo 3.2, 3.3]

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

……………………………………………………………………………………….

Polluted water

Activity 2

To study the sketch and make a list of how people pollute fresh water daily [lo 3.1]

……………………………………………………………………………………...

……………………………………………………………………………………...

……………………………………………………………………………………...

……………………………………………………………………………………...

……………………………………………………………………………………...

Yes, even the wrappers of sweets that are carelessly discarded by people in the street, might eventually end up in a dam along with the rainwater, and therefore pollute our drinking water. We already know that only 3% of all water is suitable for drinking, and every time a part of that water is polluted, it must first be purified before we can drink it.

5. Water conservation

Activity 3

To make suggestions how to save water [lo 3.3]

  • What percentage of the water on earth is fresh water and suitable for use by us? (Refer to the first page in module 14).

..............%.

  • It should therefore be clear to you that we must use the water supply sparingly.

G roup work:

“Every drop is precious” is a well-known saying we often see on large posters. The aim is to encourage people to save water.

Suppose your group is the local government and you want to encourage the people of your town or city to save water. Think up a clever slogan to influence the people.

Work on your own. Think carefully and write down at least FIVE ways how to save water. Then discuss it with your partner and select the five best ideas from your contributions. Circle the numbers of your choices. Afterwards you will have the opportunity to read them to the class.

This is how we save water

1. …………………………………………………………………………………

2. …………………………………………………………………………………

3…………………………………………………………………………………..

4. …………………………………………………………………………………

5…………………………………………………………………………………..

Assessment

Learning outcome 3: exploring issues

The learner will be able to make informed decisions about social and environmental issues and problems.

Assessment standard

We know this when the learner:

3.1 identifies issues associated with resources and services in a particular context;

3.2 identifies the factors that influence why some people have better access to resources compared to others in a particular context;

  • suggests ways to improve access to resources in a particular context.

Memorandum

  • Water for washing Chemicals
  • Diesel Sewerage
  • Rubbish Human waste
  • 3%

Questions & Answers

what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Geography grade 4. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11084/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Geography grade 4' conversation and receive update notifications?

Ask