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ID:33082053
大小:5.15 MB
页数:102页
时间:2019-02-20
《杭州城市水灾与城市发展关系分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
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