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1、第22卷第5期四川理工学院学报(自然科学版)Vol122No152009年10月JournalofSichuanUniversityofScience&Engineering(NaturalScienceEdition)Oct12009文章编号:167321549(2009)0520004204NaturalHazardsandMitigationMeasuresinUSAWUJia2er(URSCorporation,CaliforniaUSA)Abstract:NaturaldisastersfrequentlyhappersinU.S.A
2、.,frequentearthquakesinthewholewestern,centralandeasternpant,hurricanesinthecostalareainthesouth,andseriousdroughtandfloods.Becausepublicsecuritywaspaidgreatattentionto,manytonaturaldisastersdiditcausehearycasualties.Forexam2ple,61diedinthenortherncaliforiaearthquakein1994wh
3、ichatlackedpopulousLosAngeles.ThispaperdiscussesthepresenceofnaturalhazardsintheUSandtheresponsemeasuresthattheauthorbelievesarekeystothelong-termhazardmitigation.Keywords:naturalhazards;earthquake;hazardmitigation中图分类号:X4文献标识码:AFrancisco,whichwasthelargestUScityonthewestcoa
4、stIntroductionatthetime,inanearlywintermorning.Theseveresha2TheUnitedStates(US)isanaturaldisasterprone2kingandthefollowingfiresreducedalmosttheentirecitycountry.Theentirewesternandalargepartofthecentraltothegroundandkilledthreethousandpeople(USGS,andeasternUSareseismicallyac
5、tiveregions;thesouthern2009).Morerecently,anotherCaliforniacity,LosAngel2coastalregionisvulnerabletoviciousannualhurricaneat2es,wasbadlyshakenbythe1994Northridgeearthquaketacks;andharshsnowstormsarecommonwintereventsinoccurredonabranchofSanAndreasFault.Althoughthethenorthern
6、andcentralregions.Droughtandfloodcanal2numberofcasualtieswasrelativelysmall,theeconomicsobefrequentandsevereinUS.Thankstothetraditionallossof＄80billionswasstaggering.Itisbelievedthat,inemphasisonthepublicsafety,theUSpopulationingener2thenotdistantfuture,theSanAndreasFaultcou
7、ldstrikealisrelativelywellprotectedagainstmanynaturalhazards.theCityofSeattleinWashingtonStatewithevengreaterin2Forexample,the1994Northridge,Californiaearthquaketensity.Earthquakesalsooccurinotherpartofthecountry.struckthedenselypopulatedLosAngelesareaandresultedInfact,among
8、theearliestanddeadliesteventsarethe1811in61casualties,whichismuchsmaller,co
