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Many of the precautions mentioned above are expensive to apply, and are not even always practicable. Developing countries cannot afford them, thus the chances are slight that they will apply these possible solutions. Therefore the impact of floods remains a substantial problem in these developing countries.

Activity 4:

To find solutions that will prevent floods

[lo 2.3]

Can you think of any other solutions that will prevent floods?

Assessment

Learning Outcomes(LOs)
LO 2
GEOGRAPHICAL KNOWLEDGE AND UNDERSTANDINGThe learner will be able to demonstrate geographical and environmental knowledge and understanding.
Assessment standards(ASe)
We know this when the learner:
2.1 describes and explains how natural hazards such as volcanoes, earthquakes and flooding occur, and their impact on human lives and socio-economic activities [people and places];2.2 investigates and explains why some people face a higher risk than others with respect to natural hazards [people and resources];2.3 identifies how risks and hazards can be managed [people and the environment].

Memorandum

Activity 1:

  • The earth’s climate is presently changing. It is also a well-known fact that the climate of the earth has indeed changed in the past – think of the earlier ice age.
  • It is highly probable that the earth’s climate will change in future. This will certainly not happen in our lifetime. It is a gradual process that takes place over millions of years.
  • We know that there has lately been a lot of talk about the so-called “hothouse effect” and “global heating”. This is true, but the world is surely not going to change into a melting-pot in a few years’ time.
  • Research has shown that parts of South Africa experience periods of wet and dry conditions. A wet period lasting from 7 - 9 years is usually alternated with a dry period of about 7 - 9 years. Past forecasts have indicated that the 1990’s would be “wetter”, followed by “drier” years after 2000. This seems to be quite accurate if we look at the present situation.

Activity 2:

Learners do research on the results of floods.

They could possibly elaborate on some of these answers:

  • Loss of lives;
  • People left homeless, causing famine and disease;
  • Houses, buildings and roads are damaged. a Complete town can be wiped out in this way;
  • Electricity, water and sewage services are destroyed;
  • Everything is buried under mud;
  • Serious pollution (especially water pollution) causes health hazards;
  • People lose all their personal belongings, crops and/or livestock. This has serious financial implications for the population and the government alike;
  • Damwalls may break, causing floods. The country’s productivity is adversely affected and the economy is put under severe pressure;

Communication services break down. There is no contact with the outside world and rescue teams cannot reach the area.

Activity 3:

  • As squatter camps usually spring up in lower-lying, poorly drained areas, the impact of floods is even worse there.
  • People are left homeless and the informal houses are flooded or completely destroyed.
  • People may drown.
  • People lose all their personal belongings and become even poorer, for they have no other reserves.
  • Electricity, water and sewage services are interrupted, if it ever existed.
  • Transport systems are damaged and people cannot evacuate the area.

Activity 4:

Learners try and find possible solutions for floods and state their own views.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Geography grade 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11021/1.1
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