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1、DISASTERS课堂作业 张涛 qq 329701791Part1 TSUNAMIWhat we need to know about tsunamiFirst:The tsunami formationSecond:The impact of the tsunamiThird:How to rescueFourth:How to warningThe tsunami formationOne:By undersea earthquake,volcanic eruption or a huge rock landslides caused the collapse of seawater a
2、nd etc,can cause long cycle sea inshore greatly fluctuation.Two:From Japanese,refers to the undersea earthquake or volcanic eruption caused by strong destructive wave.Three:Due to the undersea earthquake,volcanic eruption,crustal,landslides,sea ocean and the nuclear inshore waters huge fluctuation p
3、henomenon.The impact of the tsunamiShortly after the violent vibration waves roar,and how to cross over the shoreline,rapid,hit the city and village,instantaneous people disappeared in waves.All the facilities,port by the collapse of the building,in the raging sea,which was ransacked.Afterwards,beac
4、h,everywhere is a broken plate and the human body.Seismic tsunami disaster to human beings is very great.At present,humanity of earthquakes,volcanoes,tsunami,etc,and only by the sudden disaster forecasting and observation to prevent or reduce the loss caused by them,but also can control them.How to
5、rescueThe most obvious is the tsunami,earthquake precursor.If you feel strong vibration,do not come near the sea,rivers and the sea.If you hear about the report,near earthquake to prevent tsunami ready,television and radio news.Remember,the tsunami sometimes in a few hours after the earthquake from
6、the thousands of kilometers away.Second,the sea after the tsunami warning ships hear back bay,should be avoided in the harbor in the tsunami causing gap and turbulence is very dangerous.If have enough time,ship owners should come before the tsunami into open water.If there is no time to leave port,a
7、ll people should evacuate the ships anchor in the harbor.Third,when the tsunami waters tend to rise or fall obviously,if you see the sea back speed unusually quick,evacuate immediately to the inland higher places.Fourth,everyone should have an aid kit,there should be enough for 72 hours,drinking wat
8、er and other necessities.How to warningTsunami warning physical foundation of seismic wave propagation speed is faster than the tsunami.Seismic wave propagation speed of P wave is approximately 6-7 km/SEC,than the tsunami propagation speed faster than 20 30 times,so far,in the tsunami waves to arriv
9、e ten minutes earlier than even hours,concrete numerical depends on the epicenter and seismic velocity and tsunamis.For example,when the epicenter of 1,000 kilometers from the epicenter of a quake,around 2.5 minutes to reach,and are going about 1 tsunami hours,1960 the super earthquake in Chile,22 h
10、ours after the tsunami to Japans coast.Part 2The Other DisasterNatural Hazards/DisastersCause for natural Hazards/DisastersImpacts Prevention and PreparednessEarthquakeMudslides The typhoonThe recent freeze disasterEarthquakeIn the crust,under the forcing,sudden release,the tectonic stress produced
11、from the source,shaking elastic wave propagation of the ground to tremble.MudslidesMudslidesMudslides refers to the mountains,deep valleys or other steep topography,because blizzard or other natural disasters triggered landslides and carry a large stones and special stream sediment.Mudslides and fas
12、t speed,with sudden flow capacity and damaging substances,etc.Often occur mud-rock flow away highway and railway transportation facilities and even villages,caused heavy loss.The typhoonThe typhoonThe typhoon is a tropical cyclone.In meteorology,according to the world meteorological organization def
13、inition:a tropical cyclone center sustained winds reach 12(32.7 per second(or above)called hurricane)or local nearly righteousness synonym word(local),name of hurricanes in the north Atlantic and eastern Pacific,But the north Pacific(north of the equator,west of the international date line,east of 1
14、00E)of nearly righteousness is typhoon(typhoon).The recent freeze disasterThe recent freeze disasterSnow disaster caused by ice and snow,snow disaster caused by the snowstorm.Snow disaster for engineering facilities,transportation and peoples lives and property caused directly,it is serious natural
15、disasters.Snow disaster occurs in the mountains,and to the agricultural production directly.The biggest hazards is on the highway transportation,which caused a series of indirect losses.Worthy of our considerationNatural or mankindHumans should doThe future of humanityTogether with mankindWhat we need to doReduce emissions of carbon dioxideUsing the new energyProhibit disorderly cut casuallyMake habits and customs with good nurturance