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底泥中微量元素的含量水平,是衡量环境质量的一个重要指标。应用粉末发射光谱法测定,可以克服化学法、原子吸收法和溶液发射光谱等方法存在的溶样困难,操作步骤复杂,周期长,一些元素易被污染的缺点,分析成本低,简便、快速,能同时测定多种元素,是一种行之有 相似文献
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陕,甘,宁,青干旱序列年表及其气候特征 总被引:5,自引:0,他引:5
根据历史文献记载和气象观测资料,事理了近200年西北上省(区)旱涝连年表,并对近200年的旱涝进行了气候统计分析,结果表明:近200年以来出现过三个干旱时期,三个多雨时期,平均10.3年发生一次大旱,4.3年发生一次一般干旱,1991年开始可能进入一个新的干旱时期。 相似文献
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Participatory public engagement approaches such as Consensus Conferences, Deliberative Polling®, and Planning Cells have been used to try and resolve environmental disputes in Japan; however, the strengths and weaknesses of these approaches have not been analyzed adequately or comprehensively. This paper evaluates practical applications of each of the above participatory approaches and conducts a crosscutting analysis of these applications to evaluate how effectively each approach provides scientific information to participants and to consider how the quality of deliberations that occur during these processes affect their outputs. Based on existing classification of participatory processes, and methodology for public involvement in US environmental decision-making, this study compares and contrasts the processes and outcomes of 25 participatory planning case studies in Japan. After compiling a case inventory of participatory approaches, the features of one approach are documented using qualitative analysis, and the aspects of four other approaches are confirmed using crosscutting analysis. In so doing, the likely strengths and weaknesses of each approach are suggested as follows. When discussions require an understanding of scientific knowledge, the Consensus Conference tends to be more suitable than the DP approach. If the consensus of participants is expected, the Consensus Conference is also thought to be suitable. But through a DP process or Simplified Planning Cells approach, we can know the quantitative portion of each opinion through results of ballots. In sum, new participatory approach that incorporates strengths of the Consensus Conference and the Simplified Planning Cells into Local Environmental Planning is needed. Thus, the quality of consensus building could be improved. 相似文献
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我局以淮河流域污染整治为总方针,把污染综合防治作为企业的“生命工程”来抓,连环推出了五大举措,9月底已初见成效,与去年同期相比,采油污水回注率提高了3.5%,年底可实现采油污水全部回注及其它工业污水达标排放,部分污染防治工程已通过江苏省环保局的初验收... 相似文献
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利用曲线补偿,变时溶出示差技术提高了测定铜、铅、锌、镉的灵敏度、精密度和准确度,进一步改变了谱图的分辨率,避免了O2波的干扰。 相似文献
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随着世界人口的增加,陆地资源日趋减少.开发利用海洋,向海洋进军,已被很多国家和地区作为解决人口、资源和环境危机的重要之路。但是,迄今为止.人们对海洋的了解甚少,海洋生态意识淡薄,所以在开发利用海洋的过程中,违反海洋生态规律,污染海洋环境.破坏海洋资源的情况屡屡发生,并且随着对海洋开发强度的加大已导致海洋资源锐减,海洋生态环境污染和破坏口愈严重。因此,了解海洋,关心海洋,规范人们的海洋开发利用活动与行为,努力去保护海洋,应当是人类的共同使命。一、海洋在全球环境及人类生存发展中的地位和作用1、海洋是… 相似文献
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随着土地管理日趋严格、规范和经济的繁荣发展,我国中、小型公司、企业租用厂房、办公楼的状况日益增多,由此而产生了新的环境污染和生态破坏。本文对厂房、办公楼租赁类型、发生区域以及环境问题特点和防污对策,进行深入的剖析。在强化土地规划制度的基础上,严格控制和跟踪房屋租赁活动,使我国预防性环境制度进一步完善和成熟。一、我国预防性的环境保护制度已落后于市场经济的发展1、土地规划制度方面。由北京大学金瑞林主编的《中国环境法》增加了预防性环境保护制度,弥补预防性制度体系的缺陷,增设第一道防线———土地规划制度。这一… 相似文献
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