Geo-hazards risk zonation and warning system based on GIS in Anshan City of Liaoning

Debris flow and Karst collapse are the main parts of geological disasters in Anshan,which have affected on the construction and development of the social economy of Anshan.In order to enhance the studies of rules of disaster and give scientific estimation and alarm ahead of schedule warning,we established the warning system of Anshan and investigated the corresponding software,which are based on the deep discussions about the crisis estimation and methods of prediction of disasters.In this paper,the foundation of model used in estimating the alarm ahead of schedule for disaster and the methods of appraisal for the alarm ahead of schedule are discussed.This system for warning and evaluating is the combination of the models of warning and GIS flat roof,with so many virtues,such as complete functions,convenience,applicability,which has considered the output of data,analyses of space,chooses of model,output of production,report of information for warning and the statements and help of system.     

看不见的危险——气体水合物

它们是以固体形式藏匿深海,储量惊人,是未来最有开发价值的清洁能源。但是,它们还可能危害地球,毁灭人类。     

高分遥感技术助力森林火灾应急扑救及隐患预判—以冕宁“4·20”森林火灾为例

高分遥感具有“易得性高”、“流程简便”、“空间分辨率高”、“星多幅宽”、“获取信息丰富”及“长时序观测能力强”等优点,对实现森林火灾“打早、打小、打了”防控目标提供了重要技术手段。本文将高分遥感技术利用于四川冕宁“4·20”林火灾害应急扑救,通过高分遥感纹理特征快速提取林火要素,获得火场附近水源位置、救援力量及扑救路线等信息;利用其波谱特征感知区域的亮温异常,以发现火点、监测火场态势演变及火情发展;基于光谱特征开展动态监测过火区范围及迁移变化,预判火情发展趋势,实时提出扑救应急部署建议,支撑救灾;选用归一化植被指数（NDVI）,完成过火区、过火烈度信息提取及初步灾损评估。针对火后次生隐患,结合过火区分布及地形因素,圈定了28条火后潜在泥石流沟,提出基于泥石流沟内高烈度面积占比、主沟长度、沟床纵比降、流域面积及沟内过火区平均坡度等影响因子,对潜在泥石流沟易发性进行评价,预判其中4条为高易发、11条为中易发、13条为低易发。研究结果为林火扑救应急决策者有效部署扑灭力量、科学决策及火后预判次生隐患、灾后重建等防灾减灾活动提供重要决策支撑依据。     

大型危险化工项目雷电灾害风险区域评估

采用宏观与微观相结合的方法,对大型危险化工项目雷电灾害风险评估进行探索。以中煤榆林甲醇醋酸系列深加工及综合利用项目一期I工程为例,根据雷闪次数、地理环境、建筑物的特性及雷电灾害防护能力和需求、人员密集情况、雷电灾害影响程度等因素将其划分为17个区域进行分析,分别计算各区域气象指标、地理环境指标、承灾体的风险指标等数据,得出17个区域雷电灾害风险等级。     

Development of dangerous geological processes in the Hankaisky Region of Primorskiy Krai （Russian Far East）

Hankaisky Region is the most densely populated and economic developed part of the Primorskiy Krai.It is promoting development of dangerous geological processes there.In the article the reasons of formation and intensive development in Hankaisky Region of the following dangerous geological processes lateral,winder and ground erosive,sill,floods,taluses,bogging,slope wash,karts,rebound of ground are considered.     

Close Approaches of Potentially Hazardous Asteroids during Two Centuries

1 INTRODUCTIONNearearth asteroid8 (NEAs) can move very near the earth or iatrude into the eath orbit,hence they are of particular concern to the wor1d. Even more so are the so-called Poten-tially Hazardous Asteroids (PHAs). PHAs (JPL, http://neo.jpl.nasa.gov/neo/pha arecurrently defined by paramters that measure the asteroid's potential of making threateningly close aPproaChes to the earth. Specilically all asteroids with an eaxth Minbo OrbitIlltersection Distance (MOID) of 0.05…     

海上危险化学物质扩散模拟研究的进展

一、前言海洋环境是人类赖以生存的一个重要领域。近年来,海洋石油的开发与运输,对海洋生态及自然环境造成了严重危害。为此,许多国家发展了模拟海上溢油扩散技术,并制定了模拟溢油扩散过程的计算机规范。关于这方面的基础研究工作,我国也属开始较早的国家之一。与此相比,海上危险化学物质扩散模拟的研究开展较少,这一方面是由于海上运输     

对渤海油气田危险冰情的监测与预警研究

一、前言渤海是一个半封闭的内海,蕴藏着丰富的油气资源,已获石油储量约１１５亿吨,其中探明石油储量约５１５亿吨,已获天然气储量约７４７亿ｍ３,其中探明天然气储量约３９３亿ｍ３。从１９６７年试采至１９９７年,已开发了８个油气田,目前有５个油气田正在生...     

“邪恶巫师”威德尔海

大西洋上的百慕大"魔鬼三角区",是很多人都知道的魔海,这片区域在漫长的岁月里,不知道吞噬了多少船只和飞机。为什么会有这么可怕的魔力,科学家们众说纷纭,却没有一个准确的答案。相比"百慕大三角",南极洲的另一个"魔海"——威德尔海就显得没那么引人瞩目了。由于它地理位置偏远,威德尔海可能并不为人熟知,但它的"魔力"却丝毫不逊于"百慕大三角"。