杭州城市水灾与城市发展关系分析

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1、However,socialdevelopmentalsogivesarisetoavarietyofhiddenperils，ofwhichurbanflooddisasteristhemostserious．Ontheotherhand，duetoglobalwarming，extremeclimateeventshaveoccurredfrequentlysothaturbanflooddisasterswhicharedeeplyaffectedbyclimatechangeareevenworsethanbefore．Withtheincreaseofurbanpopulati

2、onandexpansionofurbanscale，thedirectandindirecteconomiclossescausedbyurbanfloodsarerisingexponentiallyTherefore，theresearchintourbanflooddisastersbecomesmoreandmoreimportant．Firstly,throughcollectingmaterialsOllflooddisasterssince1990’SinHangzhou,thispaperanalyzesthemajorcausesandtheformationmech

3、anism，aswellastherelationshipbetweenrainfallandflood，andtherelationshipbetweenurbandevelopmentandflood，etc．Frommacroscopicpointofview,globalchangehasmadeachangeindisaster-formingenvironmentandworsenstheformationofdisasters；frommicroscopicpointofview,urbanizationdevelopmentchangestheconditionsofhy

4、drologicalunderlyingsurface，thuschangeshydrologicalfactorsincludingrunoffcoefficient，peakdischarge，convergencetime，floodhydrograph，etc．，andmakesurbanfloodproblemworse．Then，thispapersimulatesurbanfloodsinHangzhoubymodels．Byselectingtypicaldrainageareas，itsimulatesdifferentcombinationsoffloodlevels

5、inrivernetworks，includingdifferentrainfalllevels，canalinitialwaterlevels，andbotmdarywaterlevels，etc．Basedonmodelingresults，possiblesubmergingsituationsinresearchareasareanalyzedunderdifferentsituations，andfloodsubmergenceriskmapsoftypicalareasaredrawninthepaper．Keywords：Urbanflooddisaster；rainfal

6、l；urbandevelopment；Hangzhou浙江大学硕士学位论文致谢⋯⋯⋯⋯⋯⋯⋯．摘要⋯⋯⋯⋯⋯⋯⋯．Abstract．．．．．．．．．．．．．．．．．．．．．目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．41绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1问题的提出⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1I．2城市水灾研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．2I．3本文研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯32杭州城市水灾成因⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．52．1杭州市水灾状况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、。52．2水灾形成机理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．82．3形成水灾的主要因素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一113杭州城市发展对水灾影响⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯173．1杭州城市发展概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一173．2城市发展对大气降水的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．183．3城市发展对地表径流的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。213．4城市发展