How do Californians get the water they need?. You Try Where does the water in the Sacramento River come from? Where does the water in the Sacramento River.

How do Californians get How do Californians get the water they need?the water they need?

You TryYou Try

Where does the water in the Where does the water in the Sacramento River come from?Sacramento River come from?

Is the water in the river fresh water Is the water in the river fresh water or salt water?or salt water?

Why would a community consider Why would a community consider building a dam?building a dam?

Water ResourcesWater Resources

The human body is made up of 60 to The human body is made up of 60 to 75% of water.75% of water.

Fresh water is vital to human health.Fresh water is vital to human health. Fresh water is also necessary for Fresh water is also necessary for

growing many kinds of plants.growing many kinds of plants. People use fresh water for bathing, People use fresh water for bathing,

washing dishes, washing clothes, ect.washing dishes, washing clothes, ect.

People also use salt water.People also use salt water. People who live in places that have People who live in places that have

little fresh water, use salt water once little fresh water, use salt water once the salt and other minerals have been the salt and other minerals have been removed.removed.

Salt water resources include food, and Salt water resources include food, and sea salt. sea salt.

Sea salt is used for cooking and in Sea salt is used for cooking and in making chemicals.making chemicals.

Local Water SourcesLocal Water Sources

Most communities get their water Most communities get their water from lakes and rivers.from lakes and rivers.

Water supplies depend on how much Water supplies depend on how much rain and snow falls during a year.rain and snow falls during a year.

When rain or snow falls it collects in When rain or snow falls it collects in a watershed.a watershed.

A A watershedwatershed is an area of land in is an area of land in which water runs off into a particular which water runs off into a particular system of creeks and rivers.system of creeks and rivers.

A community may be able to take its A community may be able to take its water directly from the rivers of a water directly from the rivers of a watershed.watershed.

The amount of water in a river The amount of water in a river changes from season to season.changes from season to season.

Many communities build dams to Many communities build dams to store water for dry seasons.store water for dry seasons.

A A damdam is a barrier across a river that is a barrier across a river that controls its flow.controls its flow.

Water collects behind a dam to form Water collects behind a dam to form a reservoir.a reservoir.

A A reservoirreservoir is a body of water stored is a body of water stored for future use. for future use.

California’s largest reservoir is California’s largest reservoir is Shasta Lake built in 1945Shasta Lake built in 1945

If a community uses more water than If a community uses more water than is available from its watershed, they is available from its watershed, they may need to bring water from may need to bring water from another watershed.another watershed.

An An AqueductAqueduct is a pipe or channel is a pipe or channel used to transport water.used to transport water.

Ground waterGround water

About 40% of California’s population About 40% of California’s population uses groundwater.uses groundwater.

GroundwaterGroundwater is water under Earth’s is water under Earth’s surface located in the spaces surface located in the spaces between rocks and soil.between rocks and soil.

The water table is an imaginary line The water table is an imaginary line underneath the ground that underneath the ground that everything below the line is filled everything below the line is filled with water.with water.

Groundwater is found in rocks that have Groundwater is found in rocks that have pores.pores.

A rock layer that can store a lot of water A rock layer that can store a lot of water and let it flow through is called an aquifer. and let it flow through is called an aquifer.

Water can be obtained from drilling wells.Water can be obtained from drilling wells. Over time a well can become dry if the Over time a well can become dry if the

water table drops below the depth of the water table drops below the depth of the well.well.

If an area’s groundwater is used up, If an area’s groundwater is used up, it will take a very long time for the it will take a very long time for the water to be replaced by rain.water to be replaced by rain.