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291.
环评工作中引入政策环评的思考 总被引:1,自引:2,他引:1
从项目环评和环境规划两个层次,以实例阐述了环境影响评价制度在控制新污染、保护生态环境、实施可持续发展战略方面发挥的重要作用,提出政策环评对指导我国经济发展具有主要作用,应该早日纳入环评工作内容。 相似文献
292.
公路建设项目环境影响评价软件RoadEIA介绍 总被引:2,自引:0,他引:2
介绍了公路建设项目环境影响评价软件RoadEIA的框架及软件各部分的功能,举了一个用该软件进行评价的工程实例,最后分析总结了该软件的特点。 相似文献
293.
试论高等级公路的环境经济分析与实践 总被引:1,自引:0,他引:1
简要分析了公路工程环境经济分析的必要性,应用层次分析法(AHP)筛选出公路工程环境经济分析指标体系;应用环境经济学的方法初步探讨了公路工程建设的环境经济损失的价值评估方法和数学模型,以便在定量化评价中作指导和参考. 相似文献
294.
针对旧工业建筑再生利用项目施工过程中存在诸多安全隐患的问题,首先,结合此类项目遗留工业垃圾冗杂、施工场地狭窄、部分构件拆换、大型机械使用受限的施工特点从4MTE角度构建施工安全评价指标体系。然后,在考虑指标赋权的主客观综合性与评价工作的未确知性后,建立了基于结构熵权法与未确知测度理论的旧工业建筑再生利用项目施工安全评价模型,并通过工程实例验证该模型,得出的评价结果与实际情况相符。最后,结合未确知测度单因素指标测度函数的特点,提出了施工安全管理改进策略的制定方法。 相似文献
295.
Richao Wang Zibing Yuan Junyu Zheng Cheng Li Zhijiong Huang Wenshi Li Yan Xie Yiran Wang Kaiyang Yu Lejun Duan 《环境科学学报(英文版)》2020,32(10):138-150
Speciated characterization of Volatile Organic Compounds (VOCs), including oxygenated VOCs (OVOCs), from construction machinery and river ships in China is currently lacking. In this regard, we conducted field measurement on speciated VOC (including OVOC) emissions from six construction machinery and five river ships in the Pearl River Delta (PRD) region to identify VOC emission characteristics. We noticed that OVOC emissions from construction machinery and ships accounted for more than 50% of the total VOC emissions, followed by alkenes, aromatics and alkanes. Formaldehyde and acetaldehyde were the most emission species, accounting for 61.8%-83.2% of OVOCs. For construction machinery, the fuel-based emission factors of roller, grader and pile driver were 3.12, 3.12 and 7.36 g/kg, respectively. With the rigorous restraint by the national emission standards, VOC emissions of construction machinery had decreased considerably, especially during stage Ⅲ. Ozone formation potential was also significantly reduced due to the significant decrease in emissions of OVOCs and alkenes with higher reactivity. For river ships, the fuel-based emission factors of cargo ships and speedboat were 1.46 and 0.44 g/kg, respectively. VOC emissions from construction machinery and river ships in Guangdong Province in 2017 were 8851.0 and 4361.0 ton, respectively. This study filled the knowledge gaps of reactive gas emissions from different kinds of non-road mobile sources over the PRD, and more importantly, highlighted the necessity in adding OVOC measurement to give a complete and accurate depiction of reactive gas emissions from non-road mobile sources. 相似文献
296.
Jianwei Dong Xinghui Xi Zhining Zhang Zixuan Liu Xiaotian Zhang Husheng Li 《环境科学学报(英文版)》2018,30(12):79-87
Water regulation of the Xiaolangdi Reservoir of the Yellow River was chosen as a case to investigate variations in concentrations and bioavailability of heavy metals caused by water conservancy projects in rivers. Water and suspended sediment (SPS) samples were collected at downstream sampling sites along the river during this period. Concentrations and speciation of Zn, Cr, Cu, Ni, and Pb in water and SPS samples were analyzed, and their bioaccumulation was studied with Daphnia magna. This study indicated that the exchangeable and carbonate-bound fractions of heavy metals in SPS decreased along the studied stretch, and the dissolved heavy metal concentrations increased along the river with 1.6–15 folds. This is because sediment resuspension increased along the river during water regulation, giving rise to the increase of heavy metal release from SPS. The dissolved Zn, Cu, Ni, and Pb concentrations were significantly positively correlated with SPS concentrations, and their increase along the river was greater than Cr. The body burdens of heavy metals in D. magna exposed into samples collected from the reservoir outlet were 1.3–3.0 times lower than those from downstream stations, suggesting that the heavy metal bioavailability increased during water regulation. This should be considered in the reservoir operation. 相似文献
297.
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299.
论述了医药建设项目环境影响的特点及制定环境管理与监测计划的必要性,指出了在医药类建设项目制定环境管理与监测计划过程中应重视的问题,结合实例,介绍了环境管理与监测计划的框架,完善环境管理及监测机构设置、人员的职责、制定环境保护制度、企业正常生产运行排污和非正常工况及事故污染状况下的具体监测内容,使环境管理与监测计划具有较强可操作性,更好地服务于环保管理工作. 相似文献
300.