Future management of aquifer recharge   总被引：1，自引：3，他引：1  

Peter Dillon 《Hydrogeology Journal》2005,13(1):313-316

  相似文献   

地下圆形衬砌隧道对沿线地震动的影响(I):级数解     

梁建文  纪晓东  Vincent W Lee 《岩土力学》2005,(4)

利用波函数展开法,给出了地下圆形衬砌隧道对入射平面P波和SV波散射问题的一个级数解答,当衬砌与半空间介质相同时,该解答退化为文献中的无衬砌隧道的解答。级数解答为进一步定量研究隧道对入射平面P波和SV波的放大作用以及入射波长、入射角度、隧道直径和衬砌刚度等参数对隧道沿线地震动的影响奠定了理论基础。  相似文献   

广州市地铁沿线地下商业空间的利用对比分析   总被引：4，自引：0，他引：4  

黄莹莹  陈忠暖  陈渠 《云南地理环境研究》2006,18(4):84-89

选取广州市与地铁站出口相连的天浚和流行前线地下商业街为研究对象，运用市场研究中消费者行为分析和实地考察的方法，分别对二者的特征、消费者属性进行比较并对地下商业街与消费者属性之间的关系进行分析，得出4点结论：（1）区位条件是影响零售业布局的关键因素；（2）历史悠久、建筑风格独特、服务功能多样、基础设施完备、环境舒适、管理有序的商业街更易受顾客青睐；（3）不同的消费群体在对商业街的选择上表现出不同的偏好；（4）地铁将带动快速、简易的消费模式。  相似文献   

综合电法在祁连山山前缺水区寻找地下水的应用   总被引：1，自引：3，他引：1  

刘得福  吕旭红  任多魁 《物探与化探》2006,30(1):41-44

应用电测深、激电测深和瞬变电磁测深方法,结合区域水文地质条件,在被前人判定为贫水或无水区的河西走廊祁连山山前缺水区开展了综合电法勘查找水工作,分别发现了分布面积广的第四系大厚度粘土层深部和第三系泥岩深部存在高阻含水体。经20余眼水文地质勘探孔验证,单井涌水量大于2000m³/d,矿化度小于1.0g/L,布井成功率达95%以上。不但彻底解决了这一地区人饮水源的问题,而且为今后类似地区的找水工作积累了经验,具有显著的社会效益。  相似文献   

陈仓区地下水源地扩大开采可行性研究     

李泉  屈卉 《陕西地质》2006,24(2):50-56

本文在分析陈仓区地下水开采现状和水文地质条件的基础上,建立了水文地质概念模型,选用了承压水二维非稳定流数学模型进行描述,采用无越流的无界承压含水层干扰井群法求解该数学模型。  相似文献   

全站仪垂直角一测回标准偏差检定方法的研究     

潘建祖  王剑 《现代测绘》2006,29(1):31-32

摘要通过对全站仪测角部分编码技术分析,按照检定规程中关于测角部分中对于一测回垂直角标准偏差检定,得出在计算一测回竖直角标准偏差上进行改动即可检定方法。  相似文献   

风云三号气象卫星数据传输体制分析   总被引：6，自引：1，他引：6       下载免费PDF全文

朱爱军 《应用气象学报》2006,17(4):494-501

风云三号气象卫星 (FY-3) 是我国的新一代太阳同步轨道气象卫星, 其星-地数据传输体制采用了国际空间数据系统咨询委员会 (CCSDS) 推荐使用的先进在轨系统 (AOS) 规约和数据结构, 采用R-S编码和卷积编码级联的编码方式, 使用了L波段和X波段同时广播的方式。该文分析了FY-3星地数据传输体制, 将FY-3的传输体制与国外同类卫星传输体制进行了比较分析, 给出了FY-3的传输体制与风云一号 (FY-1) 的差别, 在此基础上提出了我国下一代气象卫星地面站建设的基本策略。  相似文献   

Assessment of environmental and engineering geological problems for the possible re-use of an abandoned rock-hewn settlement in Urgüp (Cappadocia), Turkey     

Resat Ulusay  Candan Gokceoglu  Tamer Topal  Harun Sonmez  Ergün Tuncay  Zeynal Abiddin Erguler  Ozgu Kasmer 《Environmental Geology》2006,50(4):473-494

The Cappadocia Region of Central Anatolia having a very distinct culture is one of the attractive touristic sites of Turkey due to its spectacular and unique landforms and historical heritages. In this region, the structures carved into thick to massive tuffs survived and kept their original integrity for a number of centuries. Environmental and anthropological factors at the Cappadocia Region have been the main reasons for extensive subsurface and multi-purpose use in the past and present. In addition, thermal insulation properties of the tuffs make these rocks suitable for use in underground openings. The Kayakapi Neighborhood, located in the town of Urgüp, is one of the famous historical sites. This site is situated within the “Göreme National Park and the Rock Sites of Cappadocia” which was inscribed on the World Heritage List in 1985. In order to develop the tourism potential of this abandoned site while preserving its cultural and natural values, a natural environmental conservation and revitalization project was initiated. As an integral part of this project, in this study, environmental and engineering geological problems, including rock fall potential and stability of about 1,200 rock-hewn structures, were investigated and an inventory was prepared for the possible re-use of the underground openings and other structures at the site, and remedial measures were recommended. The assessments based on observations and experimental studies indicated that the tuffs do not show significant changes both perpendicular and parallel to layering, and discontinuities and rock weathering seem to be more important factors controlling the stability of rock-hewn structures. The major stability problems threatening the re-use of the openings are structurally-controlled block instabilities, overbreaks, and erosion and shearing of the pillars made of tuff. On the other hand, the area at the entrance of the site requires some protection measures such as the construction of a retaining wall, systematic bolting of rock slabs and removal of some blocks having rock fall potential. The inventory for the openings suggests that there are a number of openings that can be re-used after necessary remedial measures.  相似文献   

东莞市连续运行卫星定位系统的构成及测试     

林剑  王新洲  刘文建  黎克敏 《测绘信息与工程》2006,31(3):4-5

介绍了连续运行卫星定位系统的组成及工作原理,通过连续运行24小时的稳定性测试和利用静态点的内、外符合精度测试,得出了该系统数据丢失率和内、外符合精度。  相似文献   

地下开采对电厂烟囱的影响预测分析     

王伟  姜岩  丁建全 《测绘信息与工程》2006,31(6):34-35

结合具体工程项目,分析了各种因素对大型高耸烟囱的影响,介绍了烟囱允许倾斜值的理论和经验计算方法,为评价和预测烟囱的稳定性提供了理论依据和实用的计算方法。  相似文献