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以某新建石化项目作案例,介绍利用CALPUFF模型进行PM_(2.5)预测的一般方法,给出预测结果并对其合理性进行分析,说明该模型在预测PM_(2.5)方面具有能操作、预测结果相关性好的特点,同时也指出由于PM_(2.5)生成的复杂性和模型在模拟污染物化学转化方面的局限性,导致模型预测结果在完整性上存在一定的不足,这需要在下一步PM_(2.5)的预测评价工作中继续探索完善。 相似文献
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小型核设施气载放射性核素大气扩散计算模式 总被引:1,自引:0,他引:1
本文从小型核设施环评项目的特点出发,对高斯烟羽模式进行了简化,建立了正常工况下气载放射性核素偏保守的大气扩散简单模式,该模式包括高架源模式和低架源模式。将大气扩散简单模式与高斯烟羽模式进行实例计算比较。通过计算和分析,大气扩散简单模式计算所需参数少,计算结果偏保守,并与高斯烟羽模式计算结果相近,能够反映下风向各处地面空气核素浓度的分布情况。 相似文献
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以某地区焦化项目为研究对象,根据工程分析结果,利用HYDRUS-1D软件构建该项目酚氰废水处理站调节池渗漏液中典型的污染物挥发酚在包气带中的运移模型,预测挥发酚在包气带中的垂直迁移,计算出挥发酚通过包气带到达地下水面的时间和浓度值,为项目的地下水溶质运移的数值模拟预测提供起始时间和初始浓度值,同时为建设项目地下水污染源强和污染场地修复治理等环境保护工程提供有力的帮助。 相似文献
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松花江四方台段是哈尔滨市生活饮用水水源地取水段,属环境敏感区和重点保护水域。聚合物工程的建设对其水质影响如何?是人们十分关心的问题。本文依据拟建工程的排水特点及受纳水体的水文特征,分别采用非持久性污染物完全混合衰减模式、推流递减模式、完全稀释混合模式和紊流扩散模式,对大明泡、库里泡、西排干和松花江四方台江段进行了水质连续性预测,预测项目为COD_(Mn)、BOD_5和石油类,预测结果可供有关部门决策时参考。 相似文献
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水泥项目环境影响评价需注意的几个要点问题 总被引:1,自引:0,他引:1
唐晓先 《中国环境管理干部学院学报》2008,18(3)
新型干法水泥项目的环境影响评价必须正确把握建设项目是否符合国家的产业政策,考虑项目的选址选线是否合理,对项目的产污环节进行全面分析,选取准确的预测模式和方法对项目的环境影响进行预测,提出可靠的污染防治对策,采取措施保证公众参与的有效性。本文根据水泥项目的行业特点,结合笔者从事该类项目环境影响评价工作的实践,对上述问题进行了比较系统的分析和讨论。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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燃煤二氧化硫控制技术应用概况 总被引:1,自引:0,他引:1
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。为解决这个问题,我国结合国外的技术成果,进行了各种脱硫技术的研究。介绍了各种治理技术应用情况,并结合实际经验对其中应注意的问题给予评述。 相似文献