Transcript Chapter 3 Lesson 1 FLOODS

Mr. Reed for Mrs. Whetstone’s Class
October 22,2009
Flood Video from Mr. Reed’s
Hometown
Flood Watch ‘94 WALB TV
Albany, Ga Part 2
What is a flood?
A flood is an event in which
water flows over land that is
normally dry.
What causes a flood?
 A heavy rainfall over a short period of time
 Hurricanes
 Other tropical storms
 Days of repeated rainfall
 Rain water fills up the ground and soil
 Additional rain has nowhere to go and flows across surface,
called runoff
Melting snow
River and Lake Floods
 Heavy or repeated rain
 Runs off into rivers and lakes
 Water in the rivers and lakes flow downstream
picking up more water along the way
 Rivers begin to overflow their banks and flooding
occurs
Example
Hurricane Katrina in 2005
Flood Damage
 Over a billion dollars per year
 Why so much damage? It is only water?
 Materials carried with water, creating mess
 Flooded buildings and cars
 Damaged crops
 Uprooted Caskets from cemeteries
 Death
 Sinkholes
How can we control floods?
 Storm Drains – a system
of pipes or channels that
carry away water from
storms
 Levees – a wall along the
banks of a river or lake,
designed to prevent
flooding
How can we control floods?
 Dam – a wall across a
river or other waterway,
designed to hold back
water
 Reservoir – an artificial
lake, used to hold water
for future use and to
control floods
 Floodway – a path for
flood waters to flow over
Georgia Floods
 Floods happen in Georgia every year
 Mostly in the mountains and coastal regions of the
southeast
 1977 – Toccoa Creek broke through a dam after heavy
rains
 1994 – Tropical storm Alberto flooded Albany, Ga and
many other cities along flint river
 2009 – Flooding in Atlanta metropolitan area
1,000,000
500,000
Are You Smarter Than a
5th Grader?
300,000
175,000
100,000
5th Grade
5th Grade
4th Grade
4th Grade
3rd Grade
3rd Grade
2nd Grade
2nd Grade
1st Grade
1st Grade
50,000
25,000
10,000
5,000
2,000
1,000
5th Grade Topic 1 Question
 What three things do engineers take into
consideration when building a levee, that helps
prevent erosion?
5th Grade Topic 1 Answer
 Size, shape, and materials
Return
5th Grade Topic 2 Question
 What two areas of Georgia are floods most
common?
5th Grade Topic 2 Answer
 Mountains and coastal region
Return
4th Grade Topic 3 Question
 Is a drainage ditch an example of a dam, a levee, a
reservoir, or a floodway?
4th Grade Topic 3 Answer
 A floodway because it is a prepared path for flood
waters to flow across
Return
4th Grade Topic 4 Question
 How are a levee and a dam different?
4th Grade Topic 4 Answer
 A levee is built along the side of a river and a dam is
built across the river.
Return
3rd Grade Topic 5 Question
 What type of flood control is being used if a city
decides to use the land around a river as a park?
3rd Grade Topic 5 Answer
 Floodway
Return
3rd Grade Topic 6 Question
 What are two of the three ways we mentioned that
floods can happen?
3rd Grade Topic 6 Answer
 Heavy rain in short period of time, repeated rain
over several days, and melting snow
Return
2nd Grade Topic 7 Question
 Name two examples of damage done from
flooding?
2nd Grade Topic 7 Answer
 Materials carried with water, creating mess
 Flooded buildings and cars
 Damaged crops
 Uprooted Caskets from cemeteries
 Death
 Sinkholes
Return
nd
2
Grade Topic 8 Question
 What is a levee?
2nd Grade Topic 8 Answer
 A levee is a wall along the banks of a river or lake,
designed to prevent flooding
Return
1st Grade Topic 9 Question
 What is a dam designed to do?
1st Grade Topic 9 Answer
 A dam is designed to hold back water
Return
1st Grade Topic 10 Question
 What is a flood?
1st Grade Topic 10 Answer
 A flood is an event in which water flows over land
that is usually dry
Return
Million Dollar Question
Grade Level Topic 11
What year OR where did 2 of the three Georgia floods
that we talked about happen?
1,000,000 Answer
 1977 in Toccoa near the S.C. border
 1994 in southern Georgia / Albany, Ga.
 2009 in Atlanta metropolitan area
Thanks for Playing!