钱塘江河口近年江道变化对浦阳江行洪影响

315201210JOURNALOFHYDROELECTRICENGINEERINGVol．31No．5Oct．20121221．3100182．310020。5～1000.22m～0.89m。1997、。3～4cm、4～5cm17～30cm、34～76cm。TV871AImpactonfloodlevelinPuyangrivercausedbyriverbedchangesofQiantangestuaryDINGTao1HUGuojian2YOUAiju21．ChinaJiliangUniversityEnvironmentalEngineeringInstituteHangzhou3100182．ZhejiangInstituteofHydraulics＆EstuaryHangzhou310020AbstractThePuyangriverlocatedinZhejiangprovinceisaprincipalriverforfloodcontrolbutitsfloodisdifficulttodischargeowingtothetidalbackwaterinQiantangestuary．Recentyearsclimatechangesandhumanactivitiescausedaconsiderablechangeintheriverbedandflowchannelsofthisestuaryandconsequentlyanobviousfloodlevelrisefrom0.22mto0.89mattheWenyanstation．Thesechangeshaveproducedsevereimpactonflood-dischargingcapacityofthisriver．Basedonanalysisonmulti-yearsriver-bedevolutionofQiantangthispaperadoptsatwo-dimensionalnumeralmodeltosimulatethefloodlevelinPuyangundertwobedconditionsriverbedaveragingupto1997andaveragingoverrecentyears．Resultsindicatethatunderafloodofreturnperiod100yearsintheestuaryfloodlevelrisesattheMeichiandLinpustationsofPuyangare3～4cmand4～5cmrespectivelyand17～30cmand34～76cmunderafloodof5years．Theseshedsomelightonthegreatimpactsbytheestuarychange．KeywordssedimentdynamicsQiantangestuaryPuyangriv[e-mail][e-mail]03431km2151km。130km。0.22m～0.89m。1。51491Fig．1LowerreachofthePuyangriverbasin2005480m778m20032～3。。4～5、。11997。、、。1～106m3Table1StoragevolumechangesofthereachfromFuchunhydropowerstationtoFuyangstation106m3----199717.4027.44121.0277.88200524.5047.50183.8899.70/%41%73%52%28%1。1997。199720055.17m1。141%73%52%28%。1997。199720050.82m3.0m3.7m2.7m。2。80°。－28m7.6～9.4m、3～4m1000。。。2005、20062480m778m61%。。3。20032004118m339%。200420085.17m3.8m3。199741～2m0.5～1.5m～20km。903m340%。1～1.5m2m。150201222.12004－20084.5m5%1988－2008204.5m3.7%。。ζt+px+qy=01pt+xp2()h+ypq()h+ghζx－Ωq+gpp2+q槡2C'2h2=1ρwxh!xx+yh!xy[]2qt+xpq()h+yq2()h+ghζy+Ωp+gqp2+q槡2C'2h2=1ρwxh!xy+yh!yy[]3ζp、qx、yhgΩρwC'!xx!xy!yyxytzxy|t=0=z0xypxy|t=0=p0xyqxy|t=0=q0xyzxyt=z*xytqxyt=q*xyt“*”Qn=0。2.22。、25m150m18030、336912a2b。2Fig．2Computationalgridsforthestudyarea2.31。19801980～5.17m。50%3.90m390%3.0m310%4.5m3。。20084。20082。2。2。5151、、。2.4200869～613、、、637m3/s9992m3/s。“”2002。、、31.2cm0.2cm2.8cm397m3/s3.98%。。3、、Fig．3VerificationofwaterlevelanddischargeatMeichiLinpuWenyanandZhijiangstations31997、23。21%、2%、5%、10%、20%11.21m、11.00m、10.49m、9.89m、9.48m9.85m、9.65m、9.07m、8.77m、8.42m。501%、2%、5%、10%、20%11.15m、10.84m、10.42m、9.80m、9.48m9.79m、9.60m、9.00m、8.74m、8.42m。23。1%3～4cm4～5cm2%9～20cm、24～30cm5%12～24m、19～33cm10%15～28cm、27～54cm20%17～30cm、34～76cm。。15220122mTable2CalculatedfloodlevelsatMeichistationm1%2%5%10%20%1%11．2111．0610．7510．3110．102%11．1511．0010．6810．2210．025%11．0110．8410．499．989．7310%10．9610．7810．429．899．6620%10．8910．7110．339．809．481%11．1811．0310．7210．2710．072%11．0610．9010．5610．029．8719975%10．8910．7210．349．779．4910%10．8110．6210．229．619．3320%10．7210．5210．119．509．181%0．030．030．030．040．032%0．090．100．120．200．15/m5%0．120．120．150．210．2410%0．150．160．200．280．2420%0．170．190．220．300．303mTable3CalculatedfloodlevelsatLinpustationm1%2%5%10%20%1%9．859．799．749．709．672%9．729．659．609．569．535%9．329．239．079．008．9710%9．209．128．928．778．7420%9．028．918．708．478．421%9．89．759．709．669．632%9．489．399．319．279．2319975%9．139．028．838．718．6410%8．938．808．578．278．2020%8．688．538．237．827．661%0．050．040．040．040．042%0．240．260．290．290．30/m5%0．190．210．240．290．3310%0．270．320．350．500．5420%0．340．380．470．650．7641997、。。1%3～4cm4～5cm20%17～30cm、34～76cm。51531．M．2003．HANZengcuiDAIZehengLIGuangbing．ThetraininganddevelopmentforQiangtangestuaryM．ChinaWaterResourcesandHydropowerPress2003．inChinese2．J．20104481584-1588．ZENGJianSUNZhilinPANCunhongetal．Long-periodicfeatureofrunoffanditseffectonriverbedinQiantangestuaryJ．JournalofZhejiangUniversityEngineeringScience20104481584-1588．inChinese3．J．200624228-38．YUJiongCAOYing．Long-termsedimenterosion/depositionanddeformationofriver-bedintheQiantangjiangriverestuaryJ．JournalOfMarineSciences200624228-38．inChinese4．J．200625546-50．HUANGSaihuaSUNZhilinZHULili．NumericalsimulationoffloodonmovablebedofatidalestuaryJ．JournalofHydroelectricEngineering200625546-50．inChinese5．J．2010293103-108．ZHUJunzhengGENGZhaoquan．CalculationofthetideandsedimenttransportinQiantangestuarybya2DnumericalmodelJ．JournalofHydroelectricEngineering2010293103-108．inChinese1406．J200821123-28．WENWeifaMALeiWANGMengnan．Influencingfactorsonpurificationefficiencybymeansofhybridconstructedwetlandssystemofvertical-flowandhorizontal-flowJ．JournalofZhongkaiAgrotechnicalCollege200821123-28．inChinese7．J．200872485-91．LUShaoyongZHANGPengyiYUGang．StudyoncontaminantsremovalandevapotranspirationfromconstructedwetlandJChinaWaterandWastewater200872485-91．inChinese8．D．201026-94．DUXiao．ThestudyonnitrogenphosphorusremovalcontrastinYunnanplateauwetlandD．KunmingUniversityofScienceandTechnology201026-94．inChinese