《表层底泥翻耕对太湖藻源性湖泛的预控作用》.pdf

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1、Sci．(湖泊科学)，2015，27(4)：607-615D0I10．18307／2015．O407⑥2015byJournalofkSciences表层底泥翻耕对太湖藻源性湖泛的预控作用何伟，陈煜权，顾春新，范成新。，蔡丽婧(1：上海勘测设计研究院有限公司，上海200434)(2：无锡市锡山区水利局，无锡214101)(3：中国科学院南京地理与湖泊研究所，南京21oo08)摘要：表层底泥已被证实是引发或诱发太湖湖泛发生的主要因素，但能否通过像控制湖泊内源污染的翻耕方式对湖泛形成预控，则有待与过程有关的实验研究．模拟研究太湖

2、易发湖泛区底泥翻耕对藻源性湖泛的控制作用，跟踪监测不同翻耕深度和翻耕后时长，对照和处理组上覆水的视觉、嗅觉、营养盐和挥发性硫化物浓度，以及表层底泥理化性质的变化．结果表明，未翻耕的对照组在模拟实验中发生了湖泛，翻耕10am和翻耕20cm差异不大，但翻耕后时长对湖泛发生影响较大．刚翻耕后(1d)即进行藻源性湖泛模拟的处理组发生了湖泛，但在程度和持续时间上均低于对照组；翻耕180d和540d的处理组，10cm和20am翻耕深度均未发生湖泛．合理选择翻耕的施工时间，可以有效预防和控制湖泛的发生．关键词：表层底泥；翻耕模拟；湖泛；理

3、化性质；挥发性硫化物Efectsofplow-tillageonthepreventionandcontrolofalgae-causedblackbloomHEWei，CHENYuquan。，GUChunxin，FANChengxin&CAILijing(1：Shanghailnvestigation，Design&ResearchInstituteCo．，Ltd．，Shanghai200434，P．R．China)(2：WuxiXishanDistrictWaterResourcesBureau，Wuxi214101，P

4、．R．China)(3：NanjingInstituteofGeographyandLimnology，ChineseAcademyofSciences，Nanjing210008，P．R．China)Abstract：Black—bloomwasanenvironmentissuethatoftenoccuredrecentlyandthepollutedsurfacesedimentWasknownasthemostimportantreasonforitsoccurrence．How—tillagewa$acost-e

5、ffectiveandpracticableengineeringmeasurewhichwasdesignedforinternalloadingcontro1．Basedonthesimulatedexperimentinlaboratory，efectsofplow—tillageonthepreventionandcontrolofalgae-causedblackbloomwasstudied．Thecolorandodor，nutrientconcentrationofoverlayingwater，thecon

6、centrationsofvolatilesulfurcompoundsandphysicochemicalcharacteristicofsedimentweremeasumd．Theresultswe~eshowedasfollows：blackbloomoccurredinbothcontrolchecksetandtreatmentsets1dayafterplow·tillageforthetwodiffirentplow-tilagedepths，butitsdurationanddegreeincontrolc

7、hecksetweremoreseriousthanthoseintreatmentsets1dayafterplow—tinage．Thetreatmentsetsof180and540daysafterplow—tillageofbothdepthsdidn'texperiencedblackbloomduringthewholesimulatedexperiment．Overall，the印一propriateprojecttimeofplow—tillageCanpreventtheoccu／Tenceandcont

8、rolthedegreeofalgae-causedblackbloom．Keywords：Surfacesediment；plow—tillage；blackbloom；physieohemicalproperties；volatilesulfurcompounds湖泛(blackblo