Uses of water

Uses of Water	example 1	example 2
INDUSTRIAL	in factories	for power
DOMESTIC	in home (cooking, hygiene, etc.	for waste disposal
AGRICULTURAL	for irrigation	------------------------------

Different realities

This video presents two very different types of lifes, the girl who has low resources and the boy who unlike the girl has clean water. By showing this, it makes us become aware of how lucky we are to even have clean water. Plus it also encourages us to be grateful of what we have. It is sad to realize that many people, especially the ones that live on third world countries, actually live on the same conditions as the girl, even without water to drink.

lets talk abot dams

ADVANTAGES

• water supply assured for all the country
• prevent floods
• massive power generator
• increase in farming

DISADVANTAGES

• people forced to move away (live in the place they are going to construct the dam)
• Destruction of natural fertility of soil, consequently farmers have to spend more money on pesticides and fertilizers
• destruction of natural environment (for building the dams, which causes wildlife loss)
• increase risk of earthquakes and landslides
• lower water levels accumulate pollutants, so there is less water life

yacyretá dam

location: between Argentina and Paraguay, in the Paraná river

Reasons for building it: The main aim of this dam was to generate hydroelectric energy, it also allows the navigation on the Parana river because, the flow of water has been reduced thanks to the dam.

problems:

1. 1200 people complain and demand for payments because of the destruction of their homes
2. people complain about poor living conditions in houses (relocation)
3. thousand of people that had a job in those areas lost it (consequently thousands of people jobless)
4. 100,000 hectares flooded because of the dam (biodiversity destruction)
5. water supplies for human consumption polluted
6. corruption complaints
7. poor maintenance of the dam (falling apart)

Tropical cyclones

tropical cyclones result in significant fatalities. Even though tropical cyclones may be exciting to watch, they can be very dangerous. Luckyly they only occur under very specific conditions in certain places in the world, these conditions are:

• warm waters: this is necessary because tropical cyclones are powered by the release of heat from the condensation of water vapor in the atmosphere.
• Wind speed is the change in wind speed or direction with height in the atmosphere. So?
• Low preasure: winds blowing towards the low pressure center of the storm creates circulation.

The warm, moist air over the ocean rises from near the surface causing an area of lower air pressure below.

(cumulonimbus cloud)

evaporating from the surface.As the storm system rotates faster and faster, an eye forms in the center. It is very calm and clear in the eye, with very low air pressure.

They are identified with different names, prepared in alphabetical order and alternated form between male and female names. For example this list of storm names from 1999 to 2004.

1999	2000	2001	2002	2003	2004
Arlene	Alberto	Allison	Arthur	Ana	Alex
Bret	Beryl	Barry	Bertha	Bill	Bonnie
Cindy	Chris	Chantal	Cristobal	Claudette	Charley
Dennis	Debby	Dean	Dolly	Danny	Danielle
Emily	Ernesto	Erin	Edouard	Erika	Earl
Floyd	Florence	Felix	Fay	Fabian	Frances
Gert	Gordon	Gabrielle	Gustav	Grace	Gaston
Harvey	Helene	Humberto	Hanna	Henri	Hermine
Irene	Isaac	Iris	Isidore	Isabel	Ivan
Jose	Joyce	Jerry	Josephine	Juan	Jeanne
Katrina	Keith	Karen	Kyle	Kate	Karl
Lenny	Leslie	Lorenzo	Lili	Larry	Lisa
Maria	Michael	Michelle	Marco	Mindy	Matthew
Nate	Nadine	Noel	Nana	Nicholas	Nicole
Ophelia	Oscar	Olga	Omar	Odette	Otto
Philippe	Patty	Pablo	Paloma	Peter	Paula
Rita	Rafael	Rebekah	Rene	Rose	Richard
Stan	Sandy	Sebastien	Sally	Sam	Shary
Tammy	Tony	Tanya	Teddy	Teresa	Tomas
Vince	Valerie	Van	Vicky	Victor	Virginie
Wilma	William	Wendy	Wilfred	Wanda	Walter

they are also diferenced by the intensity and the damage they cause, it is shown with a scale that goes from 1 to 5.

CATEGORY 1

Smal house damage. Damage to some crops and trees.

Strongest winds 90 - 125 km/h.

CATEGORY 2

Minor house damage. Significant damage to sings and trees. Heavy damage to some crops. Risk of power failure.

Strongest winds are DESTRUCTIVE 125 - 164 km/h.

CATEGORY 3

Some roof and structural damage. Power failures likely.

Strongest winds are VERY DESTRUCTIVE 165 - 224 km/h.

CATEGORY 4

Significant roofing loss and structural damage. Widespread power failures.

Strongest winds are VERY DESTRUCTIVE 225 - 279 km/h.

CATEGORY 5

Extremely dangerous with widespread destruction.

Strongest winds are VERY DESTRUCTIVE 280 km/h.

In order to reduce the damage some actions can be taken:

• implementation of wind resistance design in buildings
• Drills
• boarding up windows and doors
• store food and water somewhere
• Radio in case of evacuation alarm