FTA技术在中毒窒息中的应用

本文运用事故树分析方法对中毒窒息的原因进行了分析,通过计算事故树的最小割集、最小径集与基本事件的结构重要度,并给出了预防中毒窒息的措施.     

10万t锌系统电除尘器的设计与应用

对某厂采用普通型板式电除尘器处理l0万t锌沸腾焙烧烟气,在使用不到一年时间,造成设备腐蚀,甚至腐烂,严重影响了沸腾焙烧和制酸的正常生产,而被迫废弃的原因进行了较详细的叙述与剖析,并在此基础上重新设计研制了1台与实际生产相适应的GW1-55P-4 型电除尘器,于1998年9月建成并一次试车投产成功.     

Testing of the Storm Water Management Model Low Impact Development Modules

Stormwater infrastructure designers and operators rely heavily on the United States Environmental Protection Agency’s Storm Water Management Model (SWMM) to simulate stormwater and wastewater infrastructure performance. Since its inception in the late 1970s, improvements and extensions have been tested and evaluated rigorously to verify the accuracy of the model. As a continuation of this progress, the main objective of this study was to quantify how accurately SWMM simulates the hydrologic activity of low impact development (LID) storm control measures. Model performance was evaluated by quantitatively comparing empirical data to model results using a multievent, multiobjective calibration method. The calibration methodology utilized the PEST software, a Parameter ESTimation tool, to determine unmeasured hydrologic parameters for SWMM’s LID modules. The calibrated LID modules’ Nash–Sutcliffe efficiencies averaged 0.81; average percent bias (PBIAS) ?9%; average ratio of root mean square error to standard deviation of measured values 0.485; average index of agreement 0.94; and the average volume error, simulated vs. observed, was +9%. SWMM accurately predicted the timing of peak flows, but usually underestimated their magnitudes by 10%. The average volume reduction, measured outflow volume divided by inflow volume, was 48%. We had more difficulty in calibrating one study, an infiltration trench, which identified a significant limitation of the current version of the SWMM LID module; it cannot simulate lateral exfiltration of water out of the storage layers of a LID storm control measure. This limitation is especially severe for a deep LIDs, such as infiltration trenches. Nevertheless, SWMM satisfactorily simulated the hydrologic performance of eight of the nine LID practices.     

Understanding the Wicked Nature of “Unmanaged Recreation” in Colorado’s Front Range

Unmanaged recreation presents a challenge to both researchers and managers of outdoor recreation in the United States because it is shrouded in uncertainty resulting from disagreement over the definition of the problem, the strategies for resolving the problem, and the outcomes of management. Incomplete knowledge about recreation visitors’ values and relationships with one another, other stakeholders, and the land further complicate the problem. Uncertainty and social complexity make the unmanaged recreation issue a wicked problem. We describe the wickedness inherent in unmanaged recreation and some of the implications of wickedness for addressing the problem for the Front Range of the Rocky Mountains in Colorado. Conclusions about the nature of the problem are based on a problem appraisal that included a literature review and interviews of key informants. Addressing wickedness calls for institutional changes that allow for and reward the use of trust building, inclusive communication, and genuinely collaborative processes.     

项目竣工环境保护验收监测报告编制中若干问题的探讨

对项目竣工环境保护验收监测报告编制中常见的难点问题进行了剖析,并给出相应的解决办法。     

建设项目环境管理的思考

加强建设项目环境管理，是从源头上控制新污染源产生、防止破坏生态环境、做好环境保护工作的关键。多年来，建设项目环境管理工作从不完善逐步走向完善，对促进可持续发展起到了重要作用。但随着经济、社会的不断发展，面对新时期新任务，项目管理遇到了许多新的挑战，项目管理中也暴露出一些问题亟待解决和完善。本文从7个方面提出问题，同时给出相应的改善措施和建议。     

县级环境监测站建设的几点思考

县级环境监测站是环境保护工作中三支生力军之一，但其一直被机构残缺、经费紧张、管理体制不配套、职能未被确认、服务能力差等问题所困绕，本文对这些问题的成因进行了分析，并简要提出了解决的措施和对策。     

碘量法测定溶解氧的取样技巧及改进方法

本文通过周密的设计和反复实验,分别从取样时间、取样位置和取样体积三方面进行了分析,并且从去离子水、地表水和污水进行对比实验数据中得出一个取样的最佳方案,从而对现有碘量法测定溶解氧的分析提出了修改意见。     

重庆新型工业化的必由之路--生态工业园区

随着全球保护环境、实现可持续发展的呼声日益高涨,由此出现了一种新型的工业组织形态--生态工业园区,它通过一个区域内的物流和能源的正确设计模拟自然生态系统,形成企业间共生网络,达到减少废物,实现园区污染"零排放"的目标,从而成为各国可持续发展的主要模式之一.目前重庆地区已经规划建立了40多个特色工业园区,但没有一个是真正意义上的生态工业园区,因此结合相关构建理论,在重庆建立生态工业园区很有必要.     

油烟污染现状与治理措施研究

针对油烟污染的现状,剖析国内饮食业餐饮油烟治理情况;对存在的问题提出合理化建议。