滇池二维分层水质模拟研究

:025322468(2000)20520533204:X524:A1,2(1.,730070;2.,610065):,.,,.:;;;;Studyonthree2dimensionalandfractionalwaterqualitysimulationofDianchiLakeYANGJurui1,FANGDuo2(1.GansuAgriculturalUniversity,Lanzhou730070;2.SichuanUniversity,Chengdu610065)Abstract:Thetwo2dimensionalfractionalhybridmethodissimulatedtothecalculationofthree2dimensionalwaterqualitymodelofDi2anchiLake.Thenatwodimensionalqualitymodelisbuilt.TheTNconcentrationandthedistributionofflowvelocityarecalculated.Theresultsarewellagreedwithmonitorresults.Keywords:waterquality;DianchiLake;two2dimensional;simulatiopn:1999208205;:2000202201:(49371016):(1964),,,.310km2.,,,,,,.,9.2107kg4.7107kg;1.5106kg1.3105kg;3.2104kg2.3103kg[1].,[24].,[5],.19887.1,,,,..:99+99x(u1H1+u2H2)+99y(v1H1+v2H2)+s=0(1)99t+99x(u2H2)+99y(v2H2)=0(2)20520009ACTASCIENTIAECIRCUMSTANTIAEVol.20,No.5Sep.,20009u19t+u19u19x+v19u19y=fv1-g99y+92u19x2+92u19y2+sxpH1-2(u1-u2)(u1-u2)2+(v1-v2)2/H1(3)9v19t+u19v19x+v19v19y=-fu1-g99x+92v19x2+92v19y2+sypH1-2(v1-v2)(u1-u2)2+(v1-v2)2/H1(4)9c19t+u19c19x+v19c19y=Dx92c19x2+Dy92c19y2+f1(5)9u29t+u29u29x+v29u29y=fv2-g99y+92u29x2+92u29y2+2(u1-u2)(u1-u2)2+(v1-v2)2/H1-gC2u2u22+v22/H2(6)9v29t+u29v29x+v29v29y=-fu2-g99x+92v29x2+92v29y2+2(v1-v2)(u1-u2)2+(v1-v2)2/H2-gC2v2u22+v22/H2(7)9c29x+u29c29x+v29c29y=Dx92c29x2+Dy92c29y2+f2(8),uivixy(m/s);hi(m);2(N/m2);(m);(m);s(m3/s);ci(mg/L);f(rad/s);(m2/s);CChenzy(m1/2/s);sx,syxy(N/m2);DxDyxy(m2/s);fi;i=1,2.:(x,y,0)=0(x,y)ui(x,y,0)=u0i(x,y)vi(x,y,0)=v0i(x,y)ci(x,y,0)=c0i(x,y)(x,y,0)=0(x,y)()0,.i=1,2.::ˆviˆn=0()Dx9ci9xnx+Dy9ci9yny=0:ˆviˆnHi=“Qi;:ˆviˆnHi=-“Qi;ci=„ci,:Qij=“Qij;cij=„cij()9ci9n=0()i=1,2,j,;ˆviHi;ˆn;“Qi,“Qi(m3/(sm));“Qij43520(m3/s);cij(mg/L).2,.,f1f2:f1=SN1/H1-rNc1f2=(SN2-SN1)/H2-rNc2,SN1,SN2,rN,c1c2.319887110,780,1360.1/2500m,90.:t=20s,=10m2/s,c=30m1/2/s,Dx=Dy=1.0m2/s,n=0.03,f=10-4rad/s..,,,.:(1)(8)ntt(n+1/2)t(n+1/2)tt(n+1)t.t(nt,(n+1/2)t),uivi,.,.t((n+1/2)t,(n+1)t),,,,[6].:[6],,td2/3(t,d,),L,.9c9t=0,9v9t=0.,.,71.9m/s,,,25%.0.5m,0.5m.1.,.[2]..2,2,.,,,.,...,,5355:1(19971)Fig.1FlowfieldoflakeDianchi2(19971)Fig.2TNconcentrationfieldoflakeDianchi,..,,,.,,..,0.5m,.,NP,.41.,.,,,.2.,,TN.,,.,,.:[1].[M].:.1992.42101[2],.[R],:(852908202202).1995.225235[3],.[J].,1999,19(1):3741[4],.[J].,1999,19(1):811[5].[A].1992[C].:.1992.402407[6].L[J].,1985,2(2):20521363520