Water

Water is Precious

Don’t Waste It

Save Water Save Earth

WATER1.Water cycle

2.Sources of Water3.Main rivers in India

4.Causes of river pollution5.Ways to clean and filter water and make it fit for drinking

6.Agency that supplies drinking water in Delhi7.Diseases and effects of drinking contaminated water

8.Ways to prevent wastage of water

1. Water Cycle

The Sun heats the ocean.Ocean water evaporates and rises into the air.The water vapour cools and condenses to become droplets, which

form clouds.If enough water condenses, the drops become heavy enough to fall to

the ground as rain and snow.Some rain collects in groundwells the rest flows through rivers back

into the ocean.

2.Sources of water

There are three main sources of water:

1.Rain2.Surfacewater:Oceans,Rivers,

Streams,Ponds,Lakes3.Ground water:Wells,springs

2. Sources of water

Rain

OceanRiver

Pond

Lake Well

In places ,where there are no lakes or rivers, people dig wells, tube wells and hand pumps to get the under-ground water.

It does not rain all the time. But we need water everyday. So, we block flowing rivers with dams and build canals to take water fro one place to another.

3.Main rivers in IndiaBrahmaputra,Ganga,Gomti,Damodar, Mahanadi,Yamuna,Indus,Jhelum,Chenab,Ravi,Satluj,Sabarmati,Mahi,Narmada,Tapi, Godavri,Krishna,Penneru,Kaveri,Periyar. Rivers of India that flow into the sea are sorted out geographically as under:-

Rivers flowing into the Bay of Bengal Brahmaputra,Ganga,Yamuna,Gomti, Damodar,Mahanadi,Godavri,Krishna, Kaveri,Penneru.

Rivers flowing into the Arabian Sea

Indus,Jhelum,Chenab,Ravi,Satluj, Sabarmati,Mahi,Narmada,Tapi,Periyar.

4.Causes of River Pollution

1.Agricultural Waste2.Factories and Industrial Waste3.Carelessness of people4.Human waste/excrement.

5.Ways to clean and filter water and make it fit for

drinking

1.Sedimentation2.Disinfection3.Boiling4.Distillation5.Reverse Osmosis (R.O.)6.Water Filters7.Ozonation

6.Agency that supplies drinking water in Delhi

Delhi Jal Board is the government agency which supplies drinking water in Delhi.

7. Diseases and effects of drinking contaminated water.

Water borne diseases –(a)nausea

(b)vomiting Water based diseases – (a)filariasis

(b)clonorchiasis Water related diseases-(a)malaria

(b)yellow feverWater scarce diseases - (a)trachoma

(b)tuberculosis

8.Ways To Prevent Wastage Of Water

Don’t let the water runFixing the drips and

leakages.Watering the plants

wisely.Using less water in mug/

bucket instead of running water.

Reusing the water .