共查询到20条相似文献,搜索用时 78 毫秒
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在对区域地形地貌、地层岩性、地质构造、水文地质条件等因素调查和综合分析的基础上,针对油气终端登陆管线发生泄漏的情况,开展了地下水环境影响评价。根据滨海地区海陆相交的环境特点,重点分析石油类在地下水中运移至海洋岸线的时间。通过分析工程概况确定管道相关参数,建立预测模型,预测在非正常状况情景下,登陆管线泄漏原油在地下水中不同时间运移预测结果。结果表明:第2944d地下水中石油类 污染物扩散至海岸线,出现检出浓度;第3291d海岸线污染物出现超标现象。为此类项目的地下水环境影响评价和环境风险防范重点提供可参考的实践经验。 相似文献
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随着社会经济的快速发展和城市化进程的加快,地下水环境问题日益严重,全面、准确地评价建设项目对地下水环境影响的意义重大。以秦皇岛新兴产业园规划环评为例,在分析项目概况和水文地质条件的基础上,建立了水文地质概念模型,利用Visual Modflow软件对模型进行求解,用地下水位的长期动态观测资料对模型进行识别和验证。运用识别后的模型预测了评价区不同时期的地下水流场和溶质运移范围,为评价区地下水资源的合理开发利用提供了科学依据。 相似文献
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HJ 2.2—2018《环境影响评价技术导则大气环境》是HJ 2.2—2008的修订版本。文章依据HJ 2.2—2018,从评价等级判定、评价范围确定、环境空气质量现状调查、污染源调查、大气环境影响预测、污染物排放量核算等评价步骤入手,对比分析新旧导则下天然气长输管道项目大气环境影响评价工作的差异。对导则在实际使用中存在的问题提出建议:长距离线性工程可按省市行政区域或其他方法分段进行达标区判定;对于二、三级评价等评价等级不高的项目,可简化等级判定对基础资料的要求。 相似文献
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矿区地下水环境影响评价的关键问题探讨 总被引:1,自引:0,他引:1
随着人类社会经济的快速发展,地下水环境问题日益严重,由于地下水环境影响具有隐蔽性和滞后性,在矿区建设生产前必须对地下水环境影响进行评价。结合某拟建整合灰岩矿的地下水环境影响评价,进行了实例分析,确定了保护目标、地下水环境影响识别、矿坑涌水量的计算、预测评价方法的选取等关键技术,以期为相似矿区地下水环境影响评价提供参考。 相似文献
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脆弱的地下水环境若遭到了矿山开采废石淋滤液污染,难以治理到恢复原状。以西南地区某铁矿废石场为研究对象,基于研究区水文地质概念模型,采用地下水MGWT软件(Matlab Groundwater Tools)模拟研究区地下水稳定流场及污染物(Fe、Pb、Cd)在地下水中的迁移。数值模拟结果表明,废石场底部防渗层出现10%破损的工况条件下,污染物的运移方向与地下水流方向基本一致,Fe、Pb、Cd 3种污染物都出现不同程度的超标,并在地下水下游方向形成污染晕;在废石场防渗层破损10年后,因地下水运动缓慢,Fe、Pb、Cd的污染晕依然存在,除Pb离子超标外,Fe、Cd离子浓度可满足《地下水质量标准》(GB14848-2017)中Ⅲ类标准限制要求。 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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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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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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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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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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