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The bodies of people and animals were strewn about, which caused a health risk. This caused the water to become polluted, and another health risk reared its ugly head: cholera.

A similar situation occurred during the flood at Laingsburg on January 25th, 1981.

Activity 2:

To make a list of the consequences a flood has for people

[lo 2.1]

  • Read newspaper articles about these and other floods that occurred recently. Make your own comprehensive list of the CONSEQUENCES a flood has on the lives of people as well as on their socio-economic activities.

3. Why some people are at a higher risk of being affected by a flood than others

In many parts of the developing countries of the world the natural environment is misused and has become depleted. Because poor people usually produce for their own use only and never fertilise their land, the soil becomes impoverished and exhausted. Incorrect irrigation methods exacerbate the situation and the richer surface soil is swept away. Harvests become poorer every season and the people are faced with famine. No crop rotation takes place and cattle destroy the natural vegetation. For these people their wealth lies in the number of cattle they own, not in the quality of their cattle. Thus too many cattle are put to graze on a certain piece of land, which then destroys that land. If a flood were to occur in such an environment, there would be no natural vegetation to stem the water and everything would be washed away.

As soon as life in a rural area becomes unbearable people start to migrate to cities in search of possible employment. Since they are poor, they are forced to live in squatter camps. These squatter camps or informal settlements are usually located on less suitable or even dangerous terrain. As soon as a flood occurs these people’s houses, property and lives are in great danger. Here you only have to think of the wet Cape Flats with its thousands of homes.

Activity 3:

To study the impact of a flood on a residential area

[lo 2.1]

  • How do you think a flood will particularly affect a squatter camp?

4. Preventative measures: risk management and risk reduction

What can be done about floods?

The answer to this question is usually, “Not much”. However, people can take certain preventative steps to try to reduce the risk of future floods. Below are a few possibilities:

  • Installing flood-warning systems near important rivers where large populations are located.
  • Building dikes, flood banks and weirs to help control the flow of water.
  • Changing the flow channels of rivers – e.g. guiding a river away from a populated area.
  • Enforcing strict regulations with regard to construction sites, building codes and construction requirements.
  • Educating people to use the natural environment carefully and wisely, while paying special attention to training with regard to environment-friendly farming techniques.
  • Stabilising riverbanks.
  • Controlling and improving ditches that are badly eroded.
  • Planting vegetation in barren areas.
  • Monitoring weather predictions carefully, and taking the necessary precautions where possible.

Questions & Answers

show that the set of all natural number form semi group under the composition of addition
Nikhil Reply
what is the meaning
Dominic
explain and give four Example hyperbolic function
Lukman Reply
_3_2_1
felecia
⅗ ⅔½
felecia
_½+⅔-¾
felecia
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
x*x=2
felecia
2+2x=
felecia
×/×+9+6/1
Debbie
Q2 x+(x+2)+(x+4)=60 3x+6=60 3x+6-6=60-6 3x=54 3x/3=54/3 x=18 :. The numbers are 18,20 and 22
Naagmenkoma
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
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Shirley Reply
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Abdullahi
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Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
16
Makan
x=16
Makan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
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Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
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Seidu
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Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris 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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