Flooding can increase water pollution.

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Presentation transcript:

Flooding can increase water pollution. Agree Disagree Flooding can increase water pollution. 1._______ ________ A drought is caused by a long period of hot weather. 2._______ ________ Droughts can increase the risk of forest fires 3._______ ________ Areas of North Carolina are currently in a drought 4._______ ________ Most droughts are caused by human actions. 5._______ ________

Chapter 7 Section 4 Droughts and Floods

I. Droughts Drought – a long period of time with much less precipitation than normal 1. Caused by a dry weather system that stays over one area

North Carolina – 2007 Drought

B. Effects of Droughts 1. crop loss 2. increase risk of forest fires 3. decrease in supply of drinking water

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http://www.youtube.com/watch?v=Bg4y7sIUC8g

II. Floods Occur when the volume of water in a river or lake increases and overflows the banks Flash Flood – sudden violent flood occurring within a few hours http://www.youtube.com/watch?v=kYUpkPTcqPY

C. Controlling Floods 1. Damming a river 2. Levees – natural or man-made walls on the sides of a river

1. Lower water quality from sewage backup D. Effects of Floods: 1. Lower water quality from sewage backup 2. Increased runoff pollution http://www.youtube.com/watch?v=DmVy9y956Dk

Flooding can increase water pollution. Agree Disagree Flooding can increase water pollution. 1._______ ________ A drought is caused by a long period of hot weather. 2._______ ________ Droughts can increase the risk of forest fires 3._______ ________ Areas of North Carolina are currently in a drought 4._______ ________ Most droughts are caused by human actions. 5._______ ________