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HYDROLOGY HYDROLOGY 	 What has a bed, but never sleeps?  What has mouth, but never eats? HYDROLOGY HYDROLOGY 	 What has a bed, but never sleeps?  What has mouth, but never eats?

HYDROLOGY HYDROLOGY What has a bed, but never sleeps? What has mouth, but never eats? - PowerPoint Presentation

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HYDROLOGY HYDROLOGY What has a bed, but never sleeps? What has mouth, but never eats? - PPT Presentation

a lways babbles but never talks HYDROLOGY Water is possibly the worlds most important commodity Water makes life possible on any planet Thats why we are always looking for water on other planetswhere there is water there is the possibility life ID: 715610

hydrology water important called water hydrology called important level gradient rivers river earth base crops change state greater natural

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Slide1

HYDROLOGYSlide2

HYDROLOGY

What has a bed, but never sleeps? What has mouth, but never eats? What always runs, but never walks? What

always babbles, but never talks?Slide3

HYDROLOGY

Water is possibly the world’s most important commodity.

Water makes

life possible on any planet. That’s why we are always looking for water on other planets…where there is water, there is the possibility life.Slide4

HYDROLOGY

Water is nearly everywhere on earth.

Even in the

desert, there are places we can find water.How do things in the desert find ways to survive with so little?Slide5

HYDROLOGY

Water has a special property of being able to change

state

readily at

natural

conditions.

Such conditions are

pressure

and

temperature. Slide6

HYDROLOGY

Water is constantly moving from one

state

to another because of this.This constant movement is called the hydrological cycle.Slide7

HYDROLOGY

When water is drawn into the air from the lakes and oceans, it is called

evaporation.

When water is drawn into the air from plants, it is called transpiration.

Over the course of a year, a field of crops transpire enough water to cover the field

two feet deep!Slide8

HYDROLOGY

When water vapor condenses and falls from the sky, it is called

precipitation.Slide9

HYDROLOGY

When the water meets the ground again, there are many things it does.

When it is absorbed into the ground, it is called

infiltration.

You were right, Jenkins. The water

has

infiltrated

the cave! We’re going in!Slide10

HYDROLOGY

When the amount of rain exceeds the earth’s ability to absorb it, the water flows off the land into the rivers and other water bodies.

This is called

runoff.If too much rain falls too quickly, what happens?Slide11

HYDROLOGY

In very cold areas, water doesn’t always do this.

Since it is too cold, water might freeze on contact and become part of the ice and is stored.Slide12

HYDROLOGY

If the glaciers were to suddenly melt, the world water level would rise several

dozen meters.

This would be enough to sink Manhattan and submerge most of Florida.Slide13

HYDROLOGY

This happening Is the plot of the popular Kevin Costner movie

Water World.Slide14

HYDROLOGY

We say that the hydrological cycle is constantly

balanced

.This is because there is always the same amount of water coming down as there is going up

…so to speak.Slide15

HYDROLOGY

As we have discussed, water is always

on the move.

For this reason, moving water is the single most

important factor

in

sculpting

the earth.Slide16

HYDROLOGY

Running water

is very important to our planet and important to us.

Ancient Egyptians actually depended on floods to grow crops.Slide17

HYDROLOGY

The

gradient

is the way we describe the vertical change in a stream over a certain distance.The greater the gradient, the greater a river’s

velocity

.Slide18

HYDROLOGY

When there is very little gradient, oftentimes

meanders

are created.These are rivers with many bends and turns.Slide19

HYDROLOGY

As rivers flow, they rip away parts of the banks and floors, gouging the river deeper into the landscape by a process called

erosion.

In meanders, this happens on the outside of a curve.Slide20

HYDROLOGY

The source area of a river is called its

head.

The area where it flows to the ocean is called the mouth.Slide21

HYDROLOGY

As you might imagine, rivers can’t erode down into the earth forever.

They have to reach what is called

base level.

Ow

…Slide22

HYDROLOGY

Sea level

is considered the

ultimate base level.Lakes and other small bodies of water can be temporary base levels.Slide23

HYDROLOGY

Dams

work by creating a gradient and using it.

They use the water’s natural movement to run a series of turbines which generate electricity.Las Vegas is powered largely by

Hoover Dam.Slide24

HYDROLOGY

Mineral deposits

can be created based on how much energy the river has at a certain point.

As the stream loses energy, they drop off various minerals.