natural disaster自然灾害.ppt
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1、Natural disasterFrom group threeFire,Water Fire,Water.and Snow and SnowSea WallSea WallTroubled Troubled WaterWaterIn a JamIn a JamLower ManhattanLower Manhattan Laid Low Laid LowCalm After the Calm After the StormStormBeach,Before Beach,Before LandfallLandfallA tsunami is a series of water waves.A
2、tsunami is a series of water waves.It is caused by the displacement of a large It is caused by the displacement of a large volume of a body of water,such as an ocean.volume of a body of water,such as an ocean.This is a picture about the tsunami in Japan.As we knew,a tsunami happened in Japan because
3、 of the earthquake.As a result,it caused a series of problems.It was in Japan that a large number of people lost their life.And many buildings were destroyed.It was the natural disaster that people could not hold back.An unusual phenomenon(现象现象)about the tsunami in Japan!Mariners who escaped the ons
4、laught of the tsunami soon had Mariners who escaped the onslaught of the tsunami soon had to contend with another peril-the appearance of vast to contend with another peril-the appearance of vast whirlpools off the coast of Japan.whirlpools off the coast of Japan.刚刚逃过滚滚而来的巨大海啸浪涛的船员还来不及喘息,就又将面对刚刚逃过滚滚
5、而来的巨大海啸浪涛的船员还来不及喘息,就又将面对刚刚逃过滚滚而来的巨大海啸浪涛的船员还来不及喘息,就又将面对刚刚逃过滚滚而来的巨大海啸浪涛的船员还来不及喘息,就又将面对另一处险象环生的挑战另一处险象环生的挑战另一处险象环生的挑战另一处险象环生的挑战在日本近海岸线上出现的巨大漩涡。在日本近海岸线上出现的巨大漩涡。在日本近海岸线上出现的巨大漩涡。在日本近海岸线上出现的巨大漩涡。The powerful vortices appeared yesterday morning when the The powerful vortices appeared yesterday morning when
6、the oceans,swollen by the vast surge of water,began to recede.oceans,swollen by the vast surge of water,began to recede.The powerful vortices appeared yesterday morning when the The powerful vortices appeared yesterday morning when the oceans,swollen by the vast surge of water,began to recede.oceans
7、,swollen by the vast surge of water,began to recede.在广大淹水地区出现在广大淹水地区出现在广大淹水地区出现在广大淹水地区出现“退水退水退水退水”的情况下,出现威力强劲的大漩涡。的情况下,出现威力强劲的大漩涡。的情况下,出现威力强劲的大漩涡。的情况下,出现威力强劲的大漩涡。As the water levels fell,whirlpools hundreds of yards As the water levels fell,whirlpools hundreds of yards wide appeared,sucking everythi
8、ng into the themselves wide appeared,sucking everything into the themselves and creating new danger for passing boats.and creating new danger for passing boats.随着水位的下降,漩涡的范围扩张到几十码的区域,它随着水位的下降,漩涡的范围扩张到几十码的区域,它毫不留情滴将周围的所有一切都吸入其内,这又给过往毫不留情滴将周围的所有一切都吸入其内,这又给过往的船只造成了新的危险。的船只造成了新的危险。Whirlpools are created
9、 by rising and falling water-and Whirlpools are created by rising and falling water-and are a common feature of tsunamis.But they are rarely as are a common feature of tsunamis.But they are rarely as spectacular-or as well photographed.spectacular-or as well photographed.漩涡是由于水涨水退的变化而引起的,是海啸所常常伴漩涡是由
10、于水涨水退的变化而引起的,是海啸所常常伴随的现象,但拍摄到如此大规模的海啸,的确实属少见随的现象,但拍摄到如此大规模的海啸,的确实属少见.Originally,the interior of the earth is filled Originally,the interior of the earth is filled with hot magma.Under tremendous with hot magma.Under tremendous pressure,the hot magma will break through pressure,the hot magma will bre
11、ak through the earths crust and spouts out,causing the the earths crust and spouts out,causing the volcano.volcano.原来,地球内部充满了热的岩浆。在巨大的压力下,滚烫的岩浆会冲破地壳,喷出,造成火山。The creation of volcanic eruptionThe creation of volcanic eruptionThe creation of volcanic eruptionThe creation of volcanic eruption The effect
12、s of volcanoesThe effects of volcanoesHarm1.Cause great bad impact on the global climate1.Cause great bad impact on the global climate2.Ash and rain mixed form mudslides2.Ash and rain mixed form mudslides(泥石流)(泥石流)(泥石流)(泥石流)3.Ash can cause respiratory diseases3.Ash can cause respiratory diseases(呼吸道
13、疾病)(呼吸道疾病)(呼吸道疾病)(呼吸道疾病)Benefits1.Many of the volcanic materials have 1.Many of the volcanic materials have important industrial and chemical uses.important industrial and chemical uses.2.Volcanic ash that has been weathered 2.Volcanic ash that has been weathered(风化风化风化风化)greatly improves soil ferti
14、lity.)greatly improves soil fertility.3.The amazing scenery 3.The amazing scenery The effects of volcanoesThe effects of volcanoesSalt and minerals after the eruption of a volcanoAsh as fertilizer(肥料)(肥料)(肥料)(肥料)Mount Fuji in JapanMost importantly:How to protect yourself in How to protect yourself i
15、n the volcano eruption?the volcano eruption?The only way:Go while the going is good!(三十六计,走为上策三十六计,走为上策 )Floods are among the most frequent and costly Floods are among the most frequent and costly natural disasters.natural disasters.洪水是最常见的、代价最高的自然灾害之一。洪水是最常见的、代价最高的自然灾害之一。Conditions that cause flood
16、s include heavy or Conditions that cause floods include heavy or steady rain for several hours or days that saturates steady rain for several hours or days that saturates the ground.the ground.浸透土地的持续几小时或几天的大量降水是导致浸透土地的持续几小时或几天的大量降水是导致洪水的主要原因。洪水的主要原因。Flash floods occur suddenly due to rapidly rising
17、 Flash floods occur suddenly due to rapidly rising water along a stream or lowlying area.water along a stream or lowlying area.山洪突然出现是由于迅速上涨的水沿着小溪或低山洪突然出现是由于迅速上涨的水沿着小溪或低洼地区奔流而下。洼地区奔流而下。How does a typhoon happen?How does a typhoon happen?When lots of sea water gets hot in the summer When lots of sea
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