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引用本文:何伟,陈煜权,顾春新,范成新,蔡丽婧.表层底泥翻耕对太湖藻源性湖泛的预控作用.湖泊科学,2015,27(4):607-615. DOI:10.18307/2015.0407
HE Wei,CHEN Yuquan,GU Chunxin,FAN Chengxin,CAI Lijing.Effects of plow-tillage on the prevention and control of algae-caused black bloom. J. Lake Sci.2015,27(4):607-615. DOI:10.18307/2015.0407
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表层底泥翻耕对太湖藻源性湖泛的预控作用
何伟1, 陈煜权1, 顾春新2, 范成新3, 蔡丽婧1
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 210008
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10cm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20cm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  理化性质  挥发性硫化物
DOI:10.18307/2015.0407
分类号:
基金项目:江苏省太湖水污染治理专项(TH2013214)、中国科学院南京地理与湖泊研究所“一三五”战略发展规划项目(NIGLAS2012135008)和国家自然科学基金项目(41103033)联合资助.
Effects of plow-tillage on the prevention and control of algae-caused black bloom
HE Wei1, CHEN Yuquan1, GU Chunxin2, FAN Chengxin3, CAI Lijing1
1.Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200434, P.R.China;2.Wuxi Xishan District Water Resources Bureau, Wuxi 214101, P.R.China;3.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China
Abstract:
Black-bloom was an environment issue that often occurred recently and the polluted surface sediment was known as the most important reason for its occurrence. Plow-tillage was a cost-effective and practicable engineering measure which was designed for internal loading control. Based on the simulated experiment in laboratory, effects of plow-tillage on the prevention and control of algae-caused black bloom was studied. The color and odor, nutrient concentration of overlaying water, the concentrations of volatile sulfur compounds and physicochemical characteristic of sediment were measured. The results were showed as follows: black bloom occurred in both control check set and treatment sets l day after plow-tillage for the two diffirent plow-tillage depths, but its duration and degree in control check set were more serious than those in treatment sets l day after plow-tillage. The treatment sets of 180 and 540 days after plow-tillage of both depths didn't experienced black bloom during the whole simulated experiment. Overall, the appropriate project time of plow-tillage can prevent the occurrence and control the degree of algae-caused black bloom.
Key words:  Surface sediment  plow-tillage  black bloom  physicochemical properties  volatile sulfur compounds
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