世界滑坡目录工作组建议的滑坡术语   总被引：1，自引：0，他引：1  

张倬元  董孝璧 《地质灾害与环境保护》1995,6(1):1-6

本文介绍了联合国教科文组织世界滑坡目录工作组建议的描述滑坡特征，量度、活动状态，活动型式和类型等的基本滑坡术语。  相似文献   

两广大陆地区酸雨的时空分布规律和化学特点   总被引：3，自引：0，他引：3  

齐立文 《气象》1993,19(11):8-12

自１９８８年１月至１９８９年１２月，建立了一个包括７０个监测点的酸沉降测网，进行了常规的干，湿沉降同步观测，获得了大量的监测数据，结果表明：两广地区大面积出现酸雨，酸雨污染较严重地区是广东省粤北和珠江三角洲及广西的“汀桂走廊”。这些地区经济发展迅速，又是ＳＯ２，ＮＯｘ排放量较多的地区。降水酸度季节分布明显，即：春季＞冬季＞秋季＞夏季。降水中主要离子是Ｃａ＾２＋，ＮＨ＾＋４和ＳＯ＾２－４，化学组成以  相似文献   

随机条件下的水环境总量控制研究   总被引：5，自引：0，他引：5       下载免费PDF全文

曾维华  王华东 《水科学进展》1992,3(2):120-127

提出风险水环境容量概念,并在此基础上建立了风险水环境容量计算与容量资源分配模式,从而拓展了水环境总量控制的内涵,为水环境总量控制开辟了新的途径——随机条件下的水环境总量控制.  相似文献   

Systematic GIS-based landslide inventory as the first step for effective landslide-hazard management   总被引：1，自引：1，他引：1  

A. Colombo  L. Lanteri  M. Ramasco  C. Troisi 《Landslides》2005,2(4):291-301

The purpose of the so-called IFFI project (Inventario dei Fenomeni Franosi in Italia—Inventory of Landslides in Italy) and of many other related activities carried out by the Centro Regionale per le Ricerche Territoriali e Geologiche of ARPA Piemonte (Agenzia Regionale per la Protezione Ambientale—Regional Agency for Environmental Protection), is to map all the existing landslides in Piemonte (including both results of monitoring data and available historical data). ARPA carried out new systematic surveys using airphoto interpretation and created a specific alphanumeric geological information systems (GIS)-based database to store and process all the collected data. In order to obtain proper landslide-hazard zoning, it is necessary to provide a landslide inventory and to define the relationship between landslides and geological setting. A landslide inventory represents a fundamental base of knowledge, is a very basic tool for land planning, and strongly helps the local authorities in their decision making.  相似文献   

Gas Chromatographic Determination of Extractable Compounds Composition and Emission Rate of Volatile Terpenes from Larch Needle Litter     

Valery?IsidorovEmail author  Vera?Vinogorova  Krzysztof?Rafa?owski 《Journal of Atmospheric Chemistry》2005,50(3):263-278

A combination of solid-phase microextraction (SPME) and gas chromatography can be successfully used both for establishing the qualitative composition of volatile organic compounds (VOC) emitted by leaf litter and for determining their emission rates. Taking as an example European larch litter, it is shown that dead plant material contains considerable amounts of volatile components as well as non-volatile compounds that can be VOC precursors formed as a result of enzymatic reactions. It is proposed to include the determination of extractable compounds into the methodology of studying litter as a source of atmospheric VOC. Some data on litter mass are reported and it is concluded that this data may be included into special models for emission evaluation. In this work the distribution coefficients of monoterpene hydrocarbons between the gas phase and polydimethylsiloxane fiber coating necessary for quantitative determinations in SPME were estimated.  相似文献   

电感耦合等离子体发射光谱法间接测定煤中氯   总被引：5，自引：4，他引：5       下载免费PDF全文

岳春雷  刘稚 《岩矿测试》2003,22(1):64-66

拟定了高压氧弹燃烧处理煤样品，电感耦合等离子体发射光谱法间接测定煤中氯含量的方法。方法经国家一级煤标准物质分析验证，结果与标准值相符，11次测定的相对标准偏差＜5％。  相似文献   

火山喷出气体的环境、灾害效应及对火山未来喷发的指示意义   总被引：5，自引：1，他引：5       下载免费PDF全文

郭正府  刘嘉麒  贺怀宇  隋淑珍  孙会国  代国良  陈贺海 《地震地质》2003,25(Z1):88-98

简要综述了火山喷发过程中喷入大气圈内不同成分的火山气体含量及其气候、环境效应和造成的火山灾害 ,并介绍了利用火山喷出气体成分和含量的变异特征进行长尺度火山喷发预测的原理与方法。认为当前在中国开展长白山天池火山活动喷出气体成分和含量的系统研究十分必要 ,并具有一定的现实意义  相似文献   

若尔盖高原与三江平原沼泽湿地CH4排放差异的主要环境影响因素   总被引：22，自引：1，他引：22  

王德宣  丁维新  王毅勇 《湿地科学》2003,1(1):63-67

若尔盖高原沼泽湿地和三江平原沼泽湿地分别是我国面积最大的高原和平原淡水沼泽湿地.通过对二者常年积水的沼泽湿地CH4排放进行的同步观测,表明三江平原沼泽湿地CH4排放通量平均值是若尔盖高原的4.7倍.其中,若尔盖高原木里苔草沼泽的CH4排放通量范围是0.51～8.20 mg/(m2·h),平均值为2.87 mg/(m2·h);乌拉苔草沼泽CH4排放通量范围是0.36～10.04 mg/(m2·h),平均值为4.51 mg/(m2·h).三江平原毛果苔草沼泽湿地的CH4排放通量范围是1.32～46.38 mg/(m2·h),平均值为17.29 mg/(m2·h).水分条件和温度条件的不同是导致两地CH4排放产生差异的主要原因.在相同的温度条件下,土壤氧化还原状况对CH4排放有重要的影响.沼泽植物的种类和数量也对沼泽湿地CH4排放具有重要的作用.  相似文献   

气候变化与湿地   总被引：15，自引：7，他引：15  

陈克林  张小红  吕咏 《湿地科学》2003,1(1):73-77

概括介绍了湿地的重要性,详细论述气候变化对不同类型湿地的影响,以及湿地作为温室气体的库、汇和源在缓解气候变化方面所起的作用,并从湿地保护和合理利用的角度,提出缓解气候变化影响的对策,包括:开展湿地资源清查,收集全球各种类型湿地的数据和信息,建立更加完善的气候变化模型,以便将气候变化纳入保护和管理活动;保护、维持或恢复湿地生态系统是减缓全球气候变化的重要措施。  相似文献   

Mathematical Geology in Perspective: Has Objective Hypothesis Testing Become Overlooked?     

E. H. Timothy Whitten 《Mathematical Geology》2003,35(1):1-8

The meaning of the term Mathematical Geology was contentious at the founding meeting of IAMG in 1968 and has remained so ever since. In North American usage, it has primarily meant statistical applications in geology, and thus is an extension of inventory that has been traditional in geology. To the Leningrad school (originally led by A. B. Vistelius), it is the discipline of testing geological hypotheses mathematically. Although mathematical hypothesis testing has considerable potential for the earth sciences, unfortunately, by comparison with inventory-type studies, it has received very little attention. Reference is drawn to recent papers in which geological hypotheses have been tested mathematically.  相似文献