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1、农业环境科学学报2006,25(增刊):158-162JournalofAgro-EnvironmentScience温州三垟湿地底泥疏浚对水体总磷浓度影响的生态模型研究张修峰1,2,陆健健2(1.暨南大学水生生物研究所,广东广州510632;2.华东师范大学河口海岸国家重点实验室,上海200062)摘要:为研究三垟湿地不同底泥疏浚量对水体的影响,采用STELLA软件,构建了三垟湿地水体TP变化的生态模型并进行了模拟。结果表明:若不疏浚,水体TP会进一步增加;若将1/4的底泥清除,可维持现有水质不再恶化;若清除3/4的底泥,会对水质起到改善作用,第13个月TP浓度可接近Ⅴ类水标准
2、,3年后达Ⅳ类水标准。模拟注入Ⅳ类水,不进行底泥疏浚,TP浓度会迅速增加,1个月后增加到407.09mg·m-3,超过Ⅴ类水标准;若清除底泥的1/4,水质也迅速恶化,2个月后为433.50mg·m-3;若清除底泥的1/2,TP浓度会缓慢上升,3个月后仍好于Ⅴ类水,但水质仍缓慢趋于恶化;若清除3/4的底泥,则TP浓度缓慢下降,具有维持和净化水质的效果。关键词:湿地;水体污染;营养盐;富营养化;生态模型中图分类号:X522文献标识码:A文章编号:1672-2043(2006)增刊-0158-05AEcologicalModelofInfluencesonConcentrationso
3、fTotalPhosphorusinWaterAfterDredgingofBottomMudinSanyangWetlandofWenzhouZHANGXiu-feng1,2,LUJian-jian2(1.InstituteofHydrobiology,JinanUniversity,Guangzhou510632,`China;2.StateKeyLaboratoryofEstuarineandCoastalResearch,EastChinaNormalUniversity,Shanghai200062,China)Abstract:Inordertostudytheinf
4、luencesofdifferentamountsofbottommuddredgedinWenzhouSanyangwetlandonwaterquality,thispa-peremployedSTELLAsoftwaretoconstructamodeloftheconcentrationofTPinwaterovertime,then,accordingtothemodel,calculatedouttheeffectsonwaterqualitybydifferentamountsofbottommuddredged.Theresultsofthemodelshowed
5、that:simulationvalueswereclosetotheobserveddata,reachingveryhighprecision.Thesimulationofdifferentamountsofbottommuddredgedindicatedthat:ifnobot-tommudwascarriedout,andbecauseofthebottommud,theconcentrationofTPinwaterwouldincreasefurther;andifnoeffectonoriginalwaterqualityduringdredging,when1
6、/4ofthemudwasdisposed,itcouldpreventtheexitingwaterqualityfromworsening;andif3/4ofthemudweredisposed,itcouldimprovethewaterqualityandTPwouldbeclosetotheStandardofⅤwaterinthe13thmonthwith402.67mg·m-3;andTPwouldreachtheStandardofⅣwaterinthreeyearslater,with299.52mg-3·m.AndifⅣwaterwaspouredintoa
7、fterdredging,namely,TPconcentrationof300mg-3-3·m,whennobottommuddredged,theTPconcentrationinwaterwouldriseupto407.09mg·minamonth,quicklyexceedingtheStandardofⅤwater;if1/4ofthemudwereremoved,thewaterqualitywouldworsenrapidly,TPwouldbe433.50mg-
