秦皇岛市主要环境问题及控制对策

本文以详实的数据阐明了秦皇岛市气、水、声、生态环境质量方面存在的问题。进一步从生产力空间布局、产业结构、能源结构、城市环境基础设施、可持续发展观念五个方面分析了环境问题的成因。最后提出了调整产业结构、加强环境基础设施建设、加大环境综合整治力度、加强生态保护四项措施来解决存在的环境问题,对秦皇岛市的环境发展有一定的指导意义。     

减缓贫水化过程的途径再议

根据贫水化的严重形势，应用水循环的原理，提出了减缓贫水化的几个主要途径，对解决城市淡水短缺有参考意义。     

从泗州城的湮灭看防灾

介绍了古代泗州城的沿革，分析了它被淹没的原因，并提出了该事件对今后防灾的启示。     

关于发展通化市环保产业的几点思考

在深入调查的基础上本文分析了通化市环保产业的现状和存在的问题,并提出了相应的对策和建议。     

沈阳市屠宰及肉类加工废水处理现状及技术对策

针对屠宰及肉类加工废水的水质水量特性,在调查沈阳市屠宰及肉类加工企业废水处理现状的基础上,指出目前,一些企业缺少污水处理设施、现有设施不能正常运转及运行费用高等问题,提出技术对策:对小规模的该类企业根据实际情况,建议采用污水外运,沉积物做农肥;或人工格栅-隔油沉淀-强化气浮的一级强化工艺;或人工格栅-隔油调节池-水解酸化池-生物接触氧化池的二级工艺。对大规模的企业根据实际情况,建议采用粗、细格栅-刮渣撇油平流沉淀池-高效气浮-水解酸化-SBR/A2 O/生物接触氧化-氧化塘/人工湿地/BAF工艺。     

齐齐哈尔市建华区餐饮业噪声污染特点及防治对策

近年来城区餐饮业发展迅速,引发了一系列的环境问题。阐述了餐饮业噪声污染现状,产生污染的原因,并就如何解决这些问题提出了意见。     

乐山市茫溪河流域水环境污染及防治对策

介绍了四川省乐山市茫溪河流域的概况,对该流域水环境污染现状进行分析和评价,同时在对流域污染源调查的基础上得出流域的主要污染为城镇生活污染源.计算了茫溪河的水环境容量,并据此提出水污染总量控制方案.并根据茫溪河流域污染源的实际情况,针对城镇生活污染源、面源和工业污染源的不同特点提出具体的防治对策.     

Fatal pedestrian crashes on interstates and other freeways in the United States

Introduction: More than 800 pedestrians die annually in crashes on interstates and other freeways in the United States, but few studies have examined their characteristics. Method: Data from the Fatality Analysis Reporting System on pedestrians fatally injured during 2015–2017 were analyzed. Chi-square tests compared characteristics of pedestrians killed on interstates and other freeways with those that died on other roads, and across crash types among freeway deaths. Land use characteristics of locations where pedestrians were killed while crossing freeways in a large state (California) were identified using Google Earth. Results: A larger proportion of pedestrians killed on freeways died on dark and unlit roads (48% vs. 32%), were male (78% vs. 68%), or were ages 20–44 (55% vs. 32%) compared with pedestrians killed on other roads. Crossing (42%) was the most common crash type among pedestrian deaths on freeways, followed by disabled-vehicle-related crashes (18%). Pedestrians who died while crossing more often had blood alcohol concentrations ≥ 0.08 g/dL (40%) than those in disabled-vehicle-related (22%) or other crashes (34%). Deaths in crossing crashes were more likely than other freeway deaths to occur on urban roads (81%), at speed limits ≤50 mph (13%), or between 18:00 and 23:59 (49%), and 58% of crossing crashes analyzed for land use were located between residential and other (e.g., commercial, recreational) uses. Over a third (37%) of deaths in disabled-vehicle-related crashes occurred at speed limits ≥70 mph. Conclusions: A surprising proportion of pedestrian deaths occur on controlled-access roads not designed for walking. Countermeasures for these crashes need to be implemented to see meaningful reductions in pedestrian fatalities overall. Practical applications: Improving roadway and vehicle lighting, requiring reflective warning devices for marking disabled vehicles, constructing pedestrian overpasses and underpasses in areas frequently crossed, and promoting alternative means of traveling between residential and commercial areas could help.     

长江洪涝灾害的可持续发展综合防御对策体系

洪涝灾害严重制约了长江流域可持续发展, 本文分析了洪涝灾害的主要成因, 从合理协调人口——资源环境——社会经济三者之间深层次关系出发, 建立了长江洪涝灾害的可持续发展综合防御对策体系     

中国水电施工行业伤亡事故的特点及宏观对策

通过对水电施工行业中近１５ 年来的重大伤亡事故资料的整理与分析，归纳出水电施工行业伤亡事故的特点，并对影响伤亡事故率的综合因素进行了分析，提出了具有一定针对性的预防对策。为认识我国水电施工行业的特征、事故特点及寻找预防措施提供了一定的依据