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13420047ResourcesandEnvironmentintheYangtzeBasinVol.13No.4July2004:100428227(2004)04203752051,1,2,1(1.,,100871;2.,100871)::,,,1996200113,:,V,,,:;;;:A,,,,,,,,1,1200712107,27002736,,,,,80km,51km,168.8km,1261.08km22016,122.30(2001),18.84%,49.3%,,,,,,,,,,,22.1:,,13(1),4,24,319962001(:2003203220;:2003204208:(40041002)(40024101):(1975),,,,.©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1Fig.1ControlSectionSettinginSurfaceWaterofCangnanCounty4712),200222.2,(1)1Tab.1FunctionZoningandControlSectionSettinginSurfaceWaterofCangnanCounty332.31996200162.3.1GB3838-2002(2)2Tab.2CriterionValueofSurfaceWaterEnvironmentQualityCriterionIIIIIIIVVpH69(N)0.060.10.151.01.0(P)0.020.10.20.30.4246101590%6532(CODcr)1515203040(BOD5)3346100.000050.000050.00010.0010.0010.0020.0020.0050.010.1Cd0.0010.0050.0050.0050.01Cr6+0.010.050.050.050.10.150.50.51.520.20.51.01.52.01010202025(GB383822002);:mg/L,pH2.3.2,,,6,(CODmn)(CODcr)(BOD5)(TP)(NH3N)(TN)2.3.3::Pij=CijCio:Pj=ni=1Pij:Pj=1nPj:Ki=PijPj100%:PjjPijjiPjPijjiCijjiCioi67313©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.npH,,3,123Tab.3PollutionIndexofMainRiverControlSectionsinCangnanCountyCODmnBOD5CODCrNH3-NTNTP0.3090.4000.3170.1330.9132.2400.7191.2341.0960.8332.0255.6303.7602.4300.5450.5030.3480.3061.7550.9350.7320.8750.5490.6001.6203.3453.5111.7500.6131.4130.6322.9415.3784.8142.6320.5540.8700.5962.6203.2443.6361.9200.7510.7260.7984.2604.9155.8382.8811.0203.0281.1995.1295.9644.4503.4650.6840.6710.7271.1811.6962.8761.3060.7150.5810.7091.6901.7232.2591.2790.1500.0350.1690.3710.9420.2990.3280.0980.0490.1090.8691.1410.3180.4310.2540.0820.1130.5030.6960.2810.32221996-2001Fig.2ChangeofWaterQualityDuringthePeriodfrom1996to20013,,,,,,2.6122.911,,5.633.76,,,,,,CODmnBOD5CODcr0.41.1,0.60.8,CODcr,22.586,,CODcrBOD5,,,,3.354.3114.225,3.7255.3784.814,,,CODmnBOD5CODcr0.51.5,0.51.2,CODmn,2,1.979,2,4V,V,V,V,V,V,,3.5233.5743.856,5.9645.9645.838,,7734:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,CODmnBOD5CODCr0.53.1,0.81.3,CODmn,V,2,3V,V,,,,,,0.9260.738,1.1411.031,,0.318,0.300CODmnCOD2crBOD50.040.26,0.040.17,CODmn,22.746,,39.5%,2,510,5,20016,5,,,3,3.1,,4,3.1.1,,,,,3.1.2,:,,,,,,,3.1.3,,,,,,(),,,,,,,;(),,,;,,,3.1.4,,,,,;(),,;,,;,3.2,87313©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,3.2.1:(),,,3.2.2:,,,3.2.3:,,,,,,,:[1],,.[J].,2001,10(6):530536.[2],,.[J].,200,15(6):2427.[3],,.[J\.,2001,15(3):2325.WATERENVIRONMENTASSESSMENTANDWATERPROTECTIONINCANGNANCOUNTYVALLEYCHENJing1,WANGXue2jun1,MUQuan2jun2,HUANGYing2na1(1.DepartmentofUrbanandEnvironmentSciences;KeyLaboratoryforSurfaceProcesses,MinistryofEducation,PekingUniversity,Beijing100871,China;2.BeijingTsinghuaNovelE&EEnvironmentalProtectionCompany,Beijing100871,China)Abstract:JiangnanriverweblocatedinCangnanCounty,ZhejiangProviceiswelldevelopedinindustrialanda2griculturalproduction,andisdenselypopulated,Theriverpollutionismoreandmoresevere,Thewaterenvi2ronmentsafetyoftheriverhasbeenthechiefquestionforindustrialdevelopmentandthepeople.Basedonenvi2ronmentalmonitoringdatain13controlsectionsfrom1996to2001onthesurfacewaterqualityoftheriverinCangnanCounty,thestatusquoanddiversificationtrendofriverpollutionwasanalyzedandassessed.Themajorpointsourcesandnon2pointsourceswereidentified.WaterqualityofthemajormonitoringsectionsinHeyangbranchisbetweenordersandorder,whichcanbasicallyprovidedrinkingwater.WaterqualityinJiangnanriverweb,XiaojiangtangRiverandGansongxiRiverwereallorderV,whileJiangnanriverwebpollutionwasdeterioratedyearbyyear.Waterenvironmentprotectionmeasuresandpollutioncontrolplanningwasproposedbasedonwaterenvironmentfeaturesandtheexistingissues.Keywords:CangnanCounty;waterenvironmentsafety;surfacewaterquality;protectionmeasures9734:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.