Tropical ciclones

A Tropical ciclone is a big storm on the warm tropical oceans, it usualy have hight speed wind, heavy rain and luw atmospheric preasure. it can be calles with different names depending on the area in wich it is formed, for example: In indian Oceans they are called cyclones, in the Caribbean they are hurricanes, and in the South China Sea they are called typhoons. the meteorologists give them different names depending on emit forecasts and warnings. to form an one it is needed a temperature of at least 26°C of the water, which is why they usually occur over tropical seas.

• Now I will explain step by step the formation of a ciclone:

1. Air above the water is heated
2. the warm moist air starts to rise.
3. A centre of low pressure develops and sucks air from the surface.
4. Wind speeds increase to 150-200 km per hour, in a huge circularly.
5. Torrential rain falls, except from the cyclone's eye where the weather is calm and dry.

• The scale

the intensity of a cyclone is determined by its wind speed. in Australia a Category 1 cyclone is when the wind speed is less than 78 miles per hour; it is a Category 2 cyclone when the wind speed is between 78 and 102 miles per hour; in a Category 3 the wind speed is between 103 and 139 miles per hour; in a Category 4 cyclone it is between 140 and 173 miles per hour; and finally it is a Category 5 cyclone when the wind speed is more than 174 miles per hour.

• efects

They can be divided on three:

Inmediate:
Destruction, lose of biodivercity, lose of human life, floodings.

short tearm:
disseases on people, people movement, lose of houses

long tearm (These ones are more economical):
Reconstruction is expensive, medicines too, homeless people, shut down of servises.

Dams

Advanteges:

• Reduce of floodings
• It provide hidroelectrical power
• it provide water supplies for all the country
• improve navegation

Disadvanteges:

• A lot of people is forced to move
• lose of biodiversity and habitats
• pollution
• less water life

The Yacyretá Dam

it have 808 metres long dam and also it is a hydroelectric power plant. it was built on the waterfalls of Jasyretâ-Apipé. it was very criticized during its construction because of the flooding of the environment, it costed 15 billion. It is one of the electricity generating companies in Latin America and provides a maximum power output of 3,100 megawatts.

Rich water acces VS Poor water acces

The video is about the differences between the people who have easy acces to water and the people who do not.

In my opinion, this difference should not be so big; water is neecessary for our life and all people should have access to it.
Normally people who have oportinities like us do not think about the people who dont, and this video make us reflect about it and encourages us to help that people.

uses of water

uses                                                                        example

domestic                                                              washing, drinking, irrigation, bath, toilettes, pets or coocking





industrial                                                              creation of new products, cooling machinarie, raw material, electricity



agricultural                                                           for irrigation, boosting crop yeld, allow crops to be grown in dry periods between rainfalls, to reclaim part of the deserts and extend the area used for farming and more population means more food demand and as a result, more water demand.