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为了解泰东河疏浚工程对通榆河水质的影响,于2012年6月8日、9月12日、12月6日,对泰东河沿线以及通榆河东台段进行调查取样,分析施工期间河体水质变化。结果表明,施工期间水质参数基本保持在Ⅱ~Ⅲ类。根据江苏省水环境监测中心盐城分中心2011年、2013年监测资料评价分析,泰东河河道疏浚后,清理了河床淤泥,提高了泰东河的行洪、抗洪以及通航能力,其水质的好转有效地改善了下游通榆河的水质,确保了饮水安全。 相似文献
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随着人类活动的加剧,赤水河生态状况受到越来越多的关注,全面了解赤水河的生态状况,识别影响生态状况的主要环境胁迫因子对于赤水河的管理十分重要。笔者分别于2016年春季(4月)和秋季(9月)对赤水河干流着生硅藻及主要环境指标展开系统调查,春季以曲壳藻属相对丰度、高需氧物种、高磷物种、Shannon-Wiener多样性指数为核心参数,秋季以低需氧物种、物种丰富度、高营养物种为核心参数,构建了着生硅藻多参数指标(D-MMIs)。对赤水河干流生态状况进行评估。结果表明:调查期间,赤水河干流中上游样点水体状况优于下游样点,并且春、秋季赤水河生态状况存在差异。D-MMIs与环境因子的回归分析结果显示:影响春季赤水河生态状况的环境因子为COD,影响秋季赤水河生态状况的环境因子为NH4_+~-N。构建的赤水河D-MMIs,能够较好地指示环境胁迫因子对赤水河生态状况的影响,对于指导赤水河的管理实践具有参考价值。 相似文献
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通过长丰河沿岸主要污染源和长丰河水质污染现状的调查,基本查清了长丰河水质污染现状、造成污染的主要原因和重点原,提出了防治对策。 相似文献
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调查了2009年枯水期和丰水期胶州湾河流入海口和污水处理厂排污口壬基酚污染状况,并初步估算了胶州湾陆源壬基酚的入海通量。结果显示,入胶州湾各河流水体中壬基酚浓度差异较大,枯水期和丰水期分别为0.11~3.17 μg/L和0.09~10.8 μg/L,其中墨水河污染最为严重,其次为娄山河、海泊河、跃进河、李村河、大沽河、镰湾河和白沙河,而洋河污染则相对较轻;各污水处理厂出水口壬基酚浓度相对稳定,枯水期和丰水期为0.11~0.17 μg/L和0.15~0.29 μg/L。枯水期和丰水期胶州湾壬基酚入海通量分别为6.5 kg/d和11.8 kg/d。 相似文献
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采用河流生态健康评价体系中的水量、水质、生物、水体连通性4个指标,运用综合健康指数法分别对忻州市滹沱河4条支流进行生态健康评价。结果表明:阳武河总指标数值为34.1,呈病态状态;牧马河总指标数值为47.1,呈亚健康状态;云中河总指标数值为15.7,呈濒于崩溃状态;清水河总指标数值为75.0,呈基本健康状态。可见,该区域河流生态健康水平整体不容乐观,同时各河流具有差异性,尤其是云中河、阳武河生态修复非常迫切。 相似文献
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南通市区河流底泥营养物质污染特征及环境风险分析 总被引:1,自引:0,他引:1
以南通市区的学田河、南川河、法伦寺河、城山河及西山河为研究对象,测定了河流表层底泥中的有机质、总氮、氨氮、硝氮、总磷、无机磷及活性有机磷等营养物质指标,分析了污染最重的监测点的污染原因。此外,采用有机指数法、营养物质比值法进行了环境风险评价。得出各条河流底泥均为肥污染级,尤其污染最重的是西山河;各研究河流底泥的碳氮比都很高,说明其营养物质主要来源于周围环境;学田河和西山河底泥的氮磷比较高,说明它们的富营养化程度相对较高。通过回归分析,得出学田河、南川河、法伦寺河及城山河底泥中有机质与总氮及南川河有机质与总磷之间具有良好的线性相关性。 相似文献
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浑太河流域水质达标控制方法研究 总被引:3,自引:1,他引:2
结合浑太河流域水资源网络节点图,根据污染物来源、种类及其产生机理,针对计算单元水资源供需平衡预测数据、降雨径流值,分点源、非点源进行规划水平年污染物入河量的预测。根据浑太河流域地形特征、入河污染物降解特性,以水功能区水体纳污能力为计算单元污染物排放总量控制条件,给出基于规划水平年入河污染物变动特性的水质达标控制方法。运用该方法进行浑太河流域水质达标控制:2030年,流域总需水7.4亿立方米,缺水深度在1%以下,COD、NH3-N、TP、TN的入河量分别为28.5×104、2.8×104、3.1×104、4.6×104t,对应的入河控制量分别为9.3×104、0.6×104、0.8×104、0.9×104t,经控制后水功能区目标水质达标率100%。证实了该水质达标控制方法有效、可行。 相似文献
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针对目前室内环境监测工作出现的种种问题,就如何规范的开展室内环境监测工作,更好地为社会提供真实、准确、有效的监测数据,本文提出相关的探讨。 相似文献
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Peter Timmerman 《Environmental monitoring and assessment》1998,49(2-3):111-122
The social and economic implications of atmospheric change on biodiversity need to be seen in a global context of major shifts in the conceptualization and management of our relationship with nature. Traditionally, we have conceptualized the atmosphere and the other creatures of the biosphere as separate from the human, but their quasi-autonomy is now becoming subject to more and more human management. This raises not only economic issues, but social, political, and ethical concerns that will have substantial influence on public policy. Among these are the commodification of genetic material; the privatization of traditional knowledge; and the management of information. In this broader context, the paper examines an array of current and proposed strategies of response to changes in biodiversity as a result of climatic and other stresses. 相似文献
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Canada responded to the Global Biodiversity Convention by completing the Canadian Biodiversity Strategy in 1995. At the same time, Environment Canada also completed a national Science Assessment on Biodiversity. During this period, the Smithsonian Institution, in partnership with Parks and Environment Canada, initiated the implementation of a global biodiversity monitoring program in Canada. Under the auspices of the United Nations Man and the Biosphere Program, the SI/MAB monitoring protocols and plots have spread across Canada at an unprecedented rate. National champions in the science and educational sectors, working within an inter-disciplinary ecological framework, have guided the development, education, quality control and sharing of atmosphere-biodiversity observations electronically.Atmospheric-Biodiversity Networks and Networking have traditionally operated within separate mandates with little degree of integration. Air-Bio Networks were designed within an integrated framework to better understand the atmospheric stress on biodiversity and the adaptation actions, nationally and regionally. Detailed examples of the cumulative effects of climate change, stratospheric ozone depletion, acid deposition, ground-level ozone, suspended particulate matter and hazardous air pollutants on biodiversity will be discussed using a Southern Ontario case study. In addition, recommendations will be presented for future paired SI/MAB plots, linked networks and networking for adaptation within the context of climate, chemical and ecological gradients. 相似文献
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Xiangyun Liu Yan Yang Ying Cui Huijun Zhu Xiong Li Zhining Li Kankan Zhang Deyu Hu 《Environmental monitoring and assessment》2014,186(8):5307-5313
A simple and accurate method of determining metalaxyl and cymoxanil in pepper and soil was developed by ultra-performance liquid chromatography–photodiode array detection. The limits of detection were 0.015 mg/kg for metalaxyl and 0.003 mg/kg for cymoxanil. The limits of quantification were 0.05 mg/kg for metalaxyl in pepper and soil as well as 0.01 mg/kg for cymoxanil in pepper and soil. Recoveries of pepper and soil were investigated at three spiking levels and ranged within 77.52 to 102.05 % for metalaxyl and 87.15 to 103.21 % for cymoxanil, with relative standard deviations below 9.30 %. For field experiments, the half-lives of metalaxyl were 3.2 to 3.9 days in pepper and 4.4 to 9.5 days in soil at the three experimental locations in China. At harvest, pepper samples were found to contain metalaxyl and cymoxanil well below the maximum residue limit MRLs of the European Union (EU) following the recommended dosage and the interval of 21 days after last application. 相似文献
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Junxue Wu Hongyan Zhang Kai Wang Chengju Wang 《Environmental monitoring and assessment》2014,186(2):1195-1202
A simple and accurate method for the determination of bismerthiazol and its metabolite 2-amino-5-mercapto-1,3,4-thiadiazole was developed in Chinese cabbage and soil by high-performance liquid chromatography-diode array detection in this study. The limits of detection were 0.06 mg/kg for bismerthiazol and 0.03 mg/kg for 2-amino-5-mercapto-1,3,4-thiadiazole, respectively. Recoveries of cabbage and soil were investigated at three spiking levels and were in the range of 84.0–96.0 % for bismerthiazol and 71.0–74.6 % for 2-amino-5-mercapto-1,3,4-thiadiazole, with relative standard deviations below 7.0 %. For field experiments, the half-life of bismerthiazol was 2.4–2.5 days in Chinese cabbage and 2.5–4.8 days in soil at the two experimental locations in China. Dissipation residues of 2-amino-5-mercapto-1,3,4-thiadiazole were lower than 0.72 mg/kg. Terminal residues of bismerthiazol and its metabolite were less than 3.0 and 0.3 mg/kg in Chinese cabbage, respectively. No bismerthiazol or metabolite residues were detected in soil on days 5, 7, 10, and 14 after the last spraying at the two dosage levels. 相似文献
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Lin Wang Wenming Li Puyu Li Minghui Li Shuo Chen Lijun Han 《Environmental monitoring and assessment》2014,186(11):7793-7799
A simple residue analytical method using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) procedure for the determination of trifloxystrobin and its metabolite trifloxystrobin acid (CGA321113) in tomato and soil was developed using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The limits of detection were 0.0005 mg/kg for trifloxystrobin and 0.001 mg/kg for trifloxystrobin acid, respectively. The average recoveries in tomato and soil ranged from 73–99 % for trifloxystrobin and 75–109 % for trifloxystrobin acid, with relative standard deviations below 15 %. The method was then used to study the dissipation and residues in tomato and soil. The dissipation half-lives of trifloxystrobin in tomato were 2.9 days (Beijing) and 5.4 days (Shandong), while in soil were 1.9 days (Beijing) and 3.0 days (Shandong), respectively. The final results showed that the major residue compound was trifloxystrobin in tomato whereas it was its metabolite, trifloxystrobin acid, in soil. The final residues of total trifloxystrobin (including trifloxystrobin acid) were below the EU maximum residue limit of 0.5 mg kg?1 in tomato 3 days after the treatment. 相似文献
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