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WaterWater  Made By

Name :- Suraj Asawa

Class :- 7th 

Division:- B

Project Started :-17.7.2010

Summiting Date:-

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Preface In this project you will learn about

water, disaster photos andpollution of water.

    ACKNOWLEDGEMENT

In this project my father helped and

my computer sir.

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Rain Water Harvesting

Rainwater harvesting is the accumulating and storing, of rainwater. It has been used to provide drinking water,water for livestock, water for irrigation or to refill aquifers in a process called groundwater recharge. Rainwatercollected from the roofs of houses, tents and local

institutions, or from specially prepared areas of ground,can make an important contribution to drinking water. Insome cases, rainwater may be the only available, oreconomical, water source. Rainwater systems are simpleto construct from inexpensive local materials, and arepotentially successful in most habitable locations. Roof 

rainwater can be of good quality and may not requiretreatment before consumption. Although some rooftopmaterials may produce rainwater that is harmful to humanhealth, it can be useful in washing clothes and in othertasks. Household rainfall catchment systems are

appropriate in areas with an average rainfall greater than200 mm (7.9 in) per year, and no other accessible water

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Water to Drink

66% of the human body is made

up of water.

 At just 2% dehydration your

performance decreases by around20%.

We should drink at least 5

litres of water a day.

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80% of all illness in developing

countries is caused by water

related diseases.

90% of wastewater in developing

countries is discharged directlyinto rivers and streams withouttreatment.

Water Diseases

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World Water Uses

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World Water

Two thirds of our planet

is covered by water.

97.5% of the water is

saltwater.

The majority of freshwater

is beyond our reach, lockedinto polar snow and ice.

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Process of Water Cycle

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Clean Water

The number of people with accessto clean water has doubled in the

last 20 years.

1.1 billionpeople in the world still do

not have access to safe water. This is

nearly 20% of the population.

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Pollution of water

If waste water or chemicals are released into thewater flowing over the land the water does notremain fit for drinking . Very often waste waterform industries is allowed to flow into nearby

sources of water without any treatment. Thus,water gets contaminated. This is called waterpollution. The proportion of dissolved oxygen insuch water is less. Besides, the dissolved and

undissolved chemical substances in the water canalso prove dangerous for living things.

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In India water is more valuablethan gold

wateris not a

major problem

for some

countries of the

world .People

pay for clean

non polluted

water.

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 Tornado

A tornado is a violent, rotating column of airwhich is in contact with both the surface of theearth and a cumulonimbus cloud or, in rarecases, the base of a cumulus cloud. Tornadoescome in many shapes and sizes, but are

typically in the form of a visiblecondensation funnel, whose narrow endtouches the earth and is often encircled by acloud of debris and dust. Most tornadoes have

wind speeds less than 110 miles per hour(177 km/h), are approximately 250 feet (80 m)across, and travel a few miles (severalkilometers) before dissipating. The mostextreme can attain wind speeds of more than

300 mph (480 km/h), stretch more than two

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 Tsunami tsunami , series of catastrophic ocean waves generated

by submarine movements, which may be caused byearthquakes , volcanic eruptions, landslides beneaththe ocean, or an asteroid striking the earth. Tsunamisare also called seismic sea waves or, popularly, tidalwaves.

In the open ocean, tsunamis may have wavelengths of up to several hundred miles and travel at speeds up to500 mi per hr (800 km per hr), yet have wave heightsof less than 3 ft (1 m), which pass unnoticed beneath aship at sea. The period between the crests of a

tsunami's waves varies from 5 min to about 1 hr. Whentsunamis approach shallow water along a coast, theyare slowed, causing their length to shorten and theirheight to rise sometimes as high as 100 ft (30 m).When they break, they often destroy piers, buildings,and beaches and take human life. The wave height as

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Images

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Reference

Pollution of water from bookname general science.

Information from GoogleWebsite is :-

www.wepapers.com

Photos from Google 

 

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Conclusion

In this project we learn thatwe should not waste water

on earth there is only 3% of water.

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Thank YouThank You