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During a period of heavy ranfall in Essex, Connecticut, on 4th and 5th June 1982, dams in the town along the Fall River were monitored for signs of braks. The observation of water spilling over one of teh dams at 10 p.m. in 5th June ld to the decision to evacuate community rsidents. The notification and avacuation process was conducted by the cvolunteer fire department over a two-hour periopd. At 12.30 a.m 6th June, the upper dam on the Fall River gave way, rsulting in a rapidly moving floodwave which sequentially destroyed four additional dams along the river. Although there was extensive property damage, gthere were no serious injuries and no deaths. The responsible actons of the town officials in monitoring the dams during the period of heavy rainfall permitted the evacuation order to be given in sufficient time to evacuate the residnts. The success of the evacuation was the result of good communication, trust, and co-operation between town officials and the community. 相似文献
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风电项目环境监理过程中需重点关注风机环境防护距离内有无环境敏感点。介绍了几种适用于风电项目环境监理测量距离的方法,并且对每种方法的适用范围及操作做了详细阐述。 相似文献
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内阻是表征反应器内部状态的重要参数.传统的极化曲线法存在耗时长、对系统日常运行干扰严重等问题.本研究尝试通过减小可变外阻的调节范围,使系统内阻的测定可以在非常接近于系统日常运行状态的有限外阻变化范围内完成,在实现内阻快速测定的同时,有效控制了测定过程对系统运行状态的干扰.在外阻调节步长为10Ω,电压稳定时间1 min条件下,单次测定用时缩短到10 min,测定前后系统电流的变化1.5%.不同稳定时间对内阻测定结果的影响不大.减小外阻调节步长虽然有助于降低测量过程对系统运行的干扰,但在相同万用表精度下,测量误差有增大的趋势.本研究所提出的方法能够比较实时地反映系统内阻的变化情况. 相似文献
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In 1999, the entire population of tourism-dependent Baños, Ecuador, some 16,000 people, was evacuated in anticipation of a violent eruption of Mount Tungurahua. Subsequently, many areas in the risk zone experienced heavy ash falls, lahars, and landslides, although no cataclysmic events occurred. Many small rural communities were also evacuated. While these communities became impacted by the hazard, Baños avoided most direct effects. Conditions for all evacuees were grim, and their conditions compounded because Ecuador was simultaneously undergoing profound economic and political crises. Absent livelihood alternatives, community leaders from Baños organized a return to their town even though it remained under an evacuation order. An aggressive campaign brought tourists and more residents back and Baños revived economically; however, this was achieved at the cost of hazard awareness among both groups, tourists and residents, and public safety became compromised. 相似文献
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《Environmental Hazards》2013,12(4):143-155
Abstract This paper examines the relationship between household evacuation decisions and official emergency management practices in light of recent increases in the availability and diversity of hurricane-related information. While we focus on Hurricane Floyd in South Carolina, we incorporate findings of our longitudinal research effort covering the last four years and six post-1995 hurricane threats to the state. While only 64% of residents in the mandatory evacuation zone complied with the Hurricane Floyd evacuation order, over 80% agreed that calling an evacuation was an appropriate precautionary response given the uncertainties of the storm. Longitudinal surveys indicate that Horry County residents have developed a fairly robust strategy in making evacuation decisions. This “hurricane savvy” population depends more heavily on individuals' assessments of risks than on official orders. Individual assessment practices differ from official orders in that greater weight is given to household circumstances and preferences, the diligent monitoring of a variety of information sources, and the incorporation of past experiences into the decision-making process. Surveys indicate differences between the general public and officials in terms of priorities and preferences about hurricane evacuations. The public demands more information about the hurricane threat. Officials place more emphasis on planning evacuation routes and public safety measures. 相似文献
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选取南京市部分主干路道路绿地的7种阔叶植物群落,通过沿道路纵向每间隔5m以及不定距移动测量,结果表明:测量时间段内路缘处噪声的等效连续A声级平均值都超出GB3096-2008中相应规定的限制,其中最高的超出6dB,最低的超出1.3dB;同一阔叶植物群落,随着离开路缘的距离增加,降噪效果更加明显;不同的阔叶植物群落在同一距离处的降噪效果不同,这与植物群落的组成和内部结构特征有密切关系;植物群落的降噪效果与林带宽度并非都呈线性关系;7种阔叶植物群落达到声环境功能区环境噪声限值的临界宽度值集中在5~15m范围内;达到一定宽度的阔叶植物群落可以基本满足城市主干路的降噪要求,在道路绿化中可以广泛应用。 相似文献
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针对大流量高位巷瓦斯抽采可能诱发采空区自燃问题,以南山矿18层5分段综放面为研究背景,构建采空区气体渗流分析模型。利用变渗透系数和Forchheimer方程,求解非线性流与层流并存下采空区三维氧气分布。结果表明:高位巷瓦斯抽采使工作面氧气更易沿漏风方向采空区纵深发展,氧化带总体宽度会随抽放流量的提高而增加。在进风侧氧气分布后移程度较小,而回风侧受抽放负压显著影响,出现明显氧气富集区。上下隅角封堵配合注氮,会降低抽放对氧气渗入的诱导影响。依据研究结论,利用综合防火措施消除了高位巷附近潜在的自燃危险。 相似文献
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