Geologic Coal Assessment: The Interface with Economics     

Attanasi  Emil D. 《Natural Resources Research》2001,10(3):189-195

Geologic resource assessments describe the location, general characteristics, and estimated volumes of resources, whether in situ or technically recoverable. Such compilations are only an initial step in economic resource evaluation. This paper identifies, by examples from the Illinois and Appalachian basins, the salient features of a geologic assessment that assure its usefulness to downstream economic analysis. Assessments should be in sufficient detail to allocate resources to production units (mines or wells). Coal assessments should include the spatial distribution of coal bed characteristics and the ability to allocate parts of the resource to specific mining technologies. For coal bed gas assessment, the production well recoveries and well deliverability characteristics must be preserved and the risk structure should be specified so dryholes and noncommercial well costs are recovered by commercially successful wells.  相似文献   

Assessment of coastal vulnerability to environmental change in Jiangsu coastal plain     

YANG Gui-shan  SHI Ya-feng  ZHANG Chen  LIANG Hai-tang 《地理学报(英文版)》2001,11(1):24-33

1 IntroductionCoastal areas, with dense population and high urbanization, are highly sensitive to global environmental change. The impacts of coastal environmental changes, such as sea level rise and related disasters exacerbation on socio-economic development of coastal areas, have become a matter of public concern. To study the vulnerable scope and degree of impacts of sea level rise and related exacerbating coastal hazards can provide a scientific basis for lessening the potential losses th…  相似文献   

Building Temporal Topology in a GIS Database to Study the Land‐Use Changes in a Rural‐Urban Environment     

Danielle J. Marceau  Luc Guindon  Mireille Bruel  Claude Marois 《The Professional geographer》2001,53(4):546-558

This article addresses the issue of linking temporal and spatial information into a GIS database structure to investigate the land‐use changes in a rural‐urban region over a thirty‐five‐year period. More specifically, it describes the application of a programming package developed to build temporal topology in an historical land‐use GIS database to efficiently perform spatiotemporal queries. The program was created within the MapInfo environment using MapBasic language. Different types of information, such as the rate of change, the relationship between the change of land use and zoning regulations, and land‐use succession were extracted from the database. A user‐friendly interface was also developed to easily address spatiotemporal queries to the database. This approach represents a flexible and performing tool for scientists and planners who need to efficiently capture essential spatiotemporal information required for geographical inquiry and decision‐making.  相似文献   

Manuscript Reviewers for Volume 53     

《The Professional geographer》2001,53(4):559-581

Books reviewed: Bassin, Mark, Imperial Visions: Nationalist Imagination and Geographical Expansion in the Russian Far East, 1840 – 1865 Shortridge, James R., Our Town on the Plains: J. J. Pennell's Photographs of Junction City, Kansas, 1893 – 1922 Jakle, John A. and Sculle, Keith A., Fast Food: Roadside Restaurants in the Automobile Age Boeschenstein, Walter, Historic American Towns along the Atlantic Coast McKee, Jesse O., Ethnicity in Contemporary America: A Geographical Appraisal Luciuk, Lubomyr Y., Searching for Place: Ukrainian Displaced Persons, Ottawa, and the Migration of Memory Hausladen, Gary, Places for Dead Bodies Phillips, Richard, Watt, Diane and Shuttleton, David, De‐Centering Sexualities: Politics and Representations beyond the Metropolis Goldin, Liliana R., Identities on the Move, Transnational Processes in North America and the Caribbean Basin McDonald, David A., On Borders: Perspectives on International Migration in Southern Africa Fox, Roddy and Rowntree, Kate, The Geography of South Africa in a Changing World Takeuchi, Keiichi, Modern Japanese Geography: An Intellectual History Amery, Hussein A., and Wolf, Aaron T., Water in the Middle East: A Geography of Peace Karl, Thomas R., Nicholls, Neville and Ghazi, Anver, Weather and Climate Extremes: Changes, Variations, and a Perspective from the Insurance Industry Pittman, Blair, Texas Caves  相似文献   

水环境污染的修复技术   总被引：8，自引：0，他引：8  

朱宛华 《地学前缘》2001,8(1):143-150

由于人口增加 ,经济建设发展 ,人民生活水平提高 ,需水量也日益增长。中国水资源紧缺 ,而水污染又加重了水资源危机。水资源及水污染的修复技术的探讨有利于改善人类的生存环境。文中叙述了中国水资源紧缺、地下水超采引起的环境地质灾害 ,提倡节约用水 ,降低万元产值耗水量 ,提高单位水资源的投入产出率 ,开发节水型农业体系。建议以流域为单位 ,实行统一管理调配 ,利用地下水开采所腾出库容 ,拦蓄洪水及将处理后的污水回灌地下 ,以减少灾害 ,增加水资源量。文中还综述了地面水污染、水质富营养化、海水古咸水入侵 ,酸雨影响地下水水质及垃圾堆放场下淋滤液对地下水的污染 ;探讨了用絮凝沉淀、好氧厌氧生物处理工艺、脱氮除磷工艺、膜分离技术及高浓度有机有毒废水等在水污染治理方面的修复技术 ;探讨了对地下水中病原微生物、重金属离子、溶解有机物、硬度、三氮的截、坝、投、抽、排等的修重技术。  相似文献   

西北地区地下水的地质生态环境调节作用研究   总被引：46，自引：0，他引：46  

崔亚莉  邵景力  韩双平 《地学前缘》2001,8(1):191-196

针对西北干旱区特定的生态环境条件 ,通过凝结水对沙生植物作用的分析以及地下水位埋深对植物生长和土壤盐渍化影响的分析 ,探讨了地下水对生态环境的控制作用 ,认为地下水埋深及包气带水分运动状况 ,是主要生态环境指标 ,保持合理的生态地下水位是防治植物死亡和土地荒漠化的关键 ;维持适度的地下水位埋深 ,可以控制土壤水盐运移和均衡 ,达到改良土壤和改善地质生态环境的目的。文中还探讨了塔里木河和玛纳斯河流域水资源开发利用对生态环境的影响。  相似文献   

陆地表层地质环境质量综合评价与地质灾害系统分析——以广东沿海地带为例   总被引：3，自引：0，他引：3  

朱照宇  文启忠  阎满存  李华梅  周厚云  刁桂仪  徐义芳  余素华  黄宁生  钟健强 《地学前缘》2001,8(2):267-272

将广东沿海陆地表层地质环境划分为构造稳定性、坡面稳定性和地基稳定性三个评价层面 ,其中包括由 9个指标构成的评价指标体系 ;确定了各指标的权重和五级分级标准和环境质量的五级标准 ;使用模糊数学综合评价模型将广东沿海 190个评价单元划分为 2 2个地质环境质量区。在灾害基本数据库和灾害时空分布分析的基础上 ,划分了 9个地质灾害一级分区及 32个二级分区 ,确定了地质环境、气候气象和人为活动因素三大类致灾主控因子 ;构造了三种地质灾害系统的概念模型和灾害预测指标体系框架 ,建立了地质灾害地理信息系统。  相似文献   

地质环境生态适宜性评价指标体系研究   总被引：10，自引：0，他引：10  

周爱国  孙自永  徐恒力  徐忠胜 《地质科技情报》2001,20(2):71-74

科学合理地进行地质环境生态适宜性评价是正确处理地质资源开发利用－生态环境保护之间关系、实施可持续发展的前提。在阐述了地质环境生态适宜性评价的内涵及其评价步骤的基础上，研究了地质环境的生态适宜性评价指标体系确定原理与方法，并以河西走廊地区为例进行了具体应用，提出了可供借鉴的地质环境生态适宜性评价指标体系，并探讨了有待研究的评价标准、现状评价和预测评价、评价方法等问题。  相似文献   

现代城市环境工程地质研究的关键与技术与问题探讨   总被引：5，自引：0，他引：5       下载免费PDF全文

李相然  陈永建等 《地质与勘探》2001,37(3):68-72

分析了我国城市建设的基本和由此引起的主要环境工程地质问题，研究了现代城市环境工程地质研究的关键技术，并提出了当前我国城市环境工程地质研究亟待解决的关键问题。  相似文献   

西北干旱区水资源开发与生态环境问题   总被引：4，自引：0，他引：4  

张志忠  武强  魏学勇 《地质灾害与环境保护》2001,12(3):12-14,28

概述了西北干旱区水资源的特点和水资源开发利用状况，阐述了水资源的开发方式对生态环境的影响和作用，强调应该加强水资源的统筹规划和科学管理，合理开发利用水资源以保护西北干旱区脆弱的生态环境。  相似文献