Lesson 5.3: WATER RESOURCES

by ZMS ZMS

• ​natural resources of water that are potentially useful.

• ​Uses of water include agricultural, households, recreational and environmental activities.

• ​Moreover, about 70 percent of the human body is water and bodies of all plants and animals also contain water.

• All living things require water to grow and reproduce.

​a. Surface Water

• Water present on the surface of the earth in the form of oceans, rivers, lakes, reservoir, ponds and streams is called surface water.

• The water in rivers and lakes comes from rain and melting of snow on mountains.

• River’s flow into the sea.

• ​Supplies 64% public water system

• ​Piped and pumped to water treatment centers

• Some of the rainwater seeps through the soil on to the nonporous rocks below.

• This is underground water.

• Sometimes due to high pressure, this water sprouts out in the form of springs.

• It can be obtained by digging wells or sinking tube wells, etc.

• Groundwater lies under the surface of the land, where it travels through and fills openings in the rocks.

• The rocks that store and transmit groundwater are called aquifers

• Supplies 36% public water systems.

• ​Must be accessed at a natural spring or pumped out of the ground with a well

• The first pie chart shows how almost all of Earth's water is saline and is found in the oceans. Of the small amount that is actually freshwater, only a relatively small portion is available to sustain human, plant, and animal life. It is observed that only 3% of Earth's water is freshwater which is the water needed for life to survive.

The middle pie chart shows the breakdown of freshwater. Almost all of it is confined in ice and in the ground. Only 0.3% of all freshwater is surface water, which serves most of life's needs.

• ​Water is very important in each of our lives. Not only is it essential to our health, but also, we use it for numerous household tasks. Every day we use water for cooking, bathing, cleaning, and drinking.

• ​The World Health Organization and UNICEF Joint Monitoring Report (2017) define improved drinking water sources as those that have potential to deliver of their design and construction. These include piped water tube wells or boreholes; protected dug wells, protected springs; rainwater. Families that use bottled water or refilling stations for drinking are classified as using an improved source only if the water they use for cooking and hand washing comes from an improved source.

stored water in clouds, or precipitation into collecting bodies of water.

 Transpiration (Evapotranspiration) - is the process that allows water released from the process of

photosynthesis in plants to be released into the environment.

earth's crust and become ground water.

​ # 5.4 Water Sources (LMS)

​2nd Monthly Test-Pointers To Review

-Minerals and Rocks (Ref. Earth Science Txtbk./ppt/VSmart ( 11/23- 26/21-LMS)

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