Formation and evolution of secondary particulate matter during heavy haze pollution episodes in winter in a severe cold climate region of Northeast China

Environmental Science and Pollution Research - The formation and evolution of sulfate (SO42?) and nitrate (NO3?) secondary contaminants under different stages of pollution episodes and...     

Release behavior and mechanism of uranium and thorium from Ta-Nb tailings under simulated rainfall in Jiangxi Province,China

Environmental Science and Pollution Research - Tantalum–niobium ore belongs to associated radioactive ore, which is accompanied by a certain amount of radioactive uranium and thorium. The...     

Electric vehicle routing models and solution algorithms in logistics distribution: A systematic review

Environmental Science and Pollution Research - With the development of green logistics and the promotion of new energy vehicle development policies domestically and abroad, electric vehicles have...     

Delineation of basic farmland based on the quality and spatial stability: a case study of Yingtan City,China

Environmental Science and Pollution Research - Delimiting basic farmland is essential to ensure food security and maintain social stability. Determining the quantity and spatial layout of the basic...     

大学"绿色文明"的荣誉和形象

创建“绿色大学”的迫切性 　　全球生态危机引发的地球上“绿色”的加速失落,已经促使人类文化的“绿色”转向。在工业领域人们提倡“清洁生产”,实行 ISO14000认证制度;在消费领域,社会鼓励“绿色消费”;在教育领域,国家支持创建“绿色学校”。相比之下,绿色大学的开展则显得非常薄弱。然而高校学生是国家未来的管理者、工程师、决策者和科学家,他们的生态意识和可持续发展观念的强弱将直接影响他们未来工作时的决策。所以,加强“绿色大学”建设,培养具有较高环境意识的各类人才,是这个时代赋予我们的历史任务。 “绿色教育…     

良好环境权视角下的环境标准制度

环境标准是环境科学中经常出现的一个概念，它对环境法的制定和实施都发挥着十分重要的作用。选取了良好环境权这一视角，对环境标准制度展开论述。在分别介绍了环境标准和良好环境权的基本内容之后，对两者的互动关系进行了分析；在此基础上，文章对有关环境标准的两个难题作了深入的探讨，希望对这方面的研究有所助益。     

2D numerical analysis of the influence of near-bank vegetation patches on the bed morphological adjustment

This paper investigates the influence of near-bank vegetation patches on the bed morphological adjustment in open channel flow systems. The 2D depth-averaged hydro-morphological model is adopted for this investigation, which is first validated by laboratory experimental data measured in an open channel with a single near-bank vegetation patch. The validated model is then applied for extensive numerical simulations, with the aim of conducting a systematic analysis of the influence of different geometric controlling parameters on the bed morphological evolution. The controlling parameters taken into account for numerical analysis include the angle of repose value (RAV) of sediment, vegetation density (VD), patch length (PL) and patch width (PW). The numerical results and analysis show that: (1) the RAV of sediment with slope-failure parametrization only influences the shape of the transverse bed topography in the junction region; (2) increase in VD, PL and PW that substantially enhances flow blockage effect encourages the growth of the pool adjacent to the patch in three dimensions; (3) increase in VD, PL and PW produces analogous retrogressive erosion (erosion toward the upstream) in the pool region, presumably due to the increase in flow resistance. Additional numerical experiments suggest that the staggered-order distribution of multiple patches might be an optimal choice for channel restoration and conservation since pools and riffles with larger scales can be produced.

     

油气钻井节能减排及清洁生产措施实践

从钻井作业各环节进一步采取节能减排措施,对企业环境保护极为重要。结合四川油气田钻井作业实际,从生产过程中的八个环节较详细地分析论述了节能减排清洁生产的主要措施,以龙岗10井为清洁生产示范工程,介绍了其清洁生产与节能减排所取得的绩效,处理后水质达到《污水综合排放标准》(GB8978-1996)一级标准,清洁生产主要指标达到中国石油天然气集团公司规定的钻井清洁生产指标的二级指标要求。     

浅论环境监测数据的综合分析方法

准确、可靠、可比的环境监测数据是环境科学研究工作的基础,是环境管理的依据。在第一时间判断出监测分析数据是否合理的基础上,再对监测分析的数据作进一步的分析评价,是整个数据综合分析的基础,为进一步综合分析数据提供了依据。本文通过分析几种常用的监测数据的分析方法,说明对监测数据进行综合分析是至关重要的。