钻孔资料管理和自动成图技术研究   总被引：12，自引：1，他引：12  

黄树桃  王树红  韩绍阳  蔡煜琦  郑恩久 《铀矿地质》2004,20(1):51-55

本文系统介绍了根据铀矿勘查生产和科研需求建立钻孔数据库的方法 ,对钻孔数据库的结构和功能进行了详细描述 ,同时也介绍了通过数据库接口对钻孔数据库进行自动成图的技术方法 ,并且在GIS平台中成功地实现了柱状图的全自动绘制和剖面图半自动绘制。该系统的建立极大地提高了生产和科研效率。  相似文献   

河南平顶山地区第四纪地层序列划分     

杨长秀  刘振宏  武太安  崔霄峰  李春艳  杨长青 《华北地质》2004,27(1):52-57

根据岩石地层学、地貌学、孢粉学特征,将河南平顶山地区的第四系划分为4个岩石地层单位,由老到新分别为鲁山组、下汤组、社旗组和马塘组。鲁山组分布于前隆起岗地,为冲洪积成因,形成于225×104aB.P.。下汤组具二元结构,组成河流Ⅳ级阶地,属河流冲积成因,形成于64×104aB.P.。社旗组具二元结构特征,组成河流Ⅲ级阶地,属河流冲积成因,形成年代大于5.42×104aB.P.。马塘组也具二元结构特征,组成河流Ⅱ级阶地,属河流冲积成因,形成于2×104aB.P.。岩石地层单位的划分为探讨黄河—淮河冲积平原及南阳盆地的形成与演化提供了基础性资料。  相似文献   

SH波对无限介质土中衬砌结构的动应力集中     

周香莲  周光明 《岩土力学》2004,25(Z2):366-368

运用复变函数法和保角映射法对无限介质土中的衬砌结构进行分析.通过引入两个势函数将弹性介质的控制方程解耦成两个Helmholtz方程.利用所得势函数的通解,得到无限土介质和衬砌结构的位移和应力的表达式,利用无限介质与衬砌结构之间的连续性条件和衬砌结构内边界上的边界条件,可确定波函数展开式中的末知系数,并给出动应力集中系数的数值结果.  相似文献   

大兴安岭地区浅覆盖层对地面伽马能谱测量的影响   总被引：1，自引：2，他引：1  

刘菁华  王祝文  郝立波  田钢 《物探与化探》2004,28(2):111-113

讨论在大兴安岭地区进行地质填图中浅覆盖层对伽马能谱测量的影响问题。通过放射性元素的取样分析、岩石—土壤的矿物分析以及实测剖面分析,得知了伽马能谱测量的影响因素,从而为应用伽马能谱测量解决地质填图中的问题提供了依据。  相似文献   

Application of Remote Sensing in Flood Management with Special Reference to Monsoon Asia: A Review   总被引：4，自引：1，他引：4  

Sanyal  Joy  Lu  X. X. 《Natural Hazards》2004,33(2):283-301

The conventional means to record hydrological parameters of aflood often fail to record an extreme event. Remote sensingtechnology along with geographic information system (GIS)has become the key tool for flood monitoring in recent years.Development in this field has evolved from optical to radarremote sensing, which has provided all weather capabilitycompared to the optical sensors for the purpose of flood mapping.The central focus in this field revolves around delineation of floodzones and preparation of flood hazard maps for the vulnerable areas.In this exercise flood depth is considered crucial for flood hazardmapping and a digital elevation model (DEM) is considered to bethe most effective means to estimate flood depth from remotelysensed or hydrological data. In a flat terrain accuracy of floodestimation depends primarily on the resolution of the DEM. Riverflooding in the developing countries of monsoon Asia is very acutebecause of their heavy dependence on agriculture but any floodestimation or hazard mapping attempt in this region is handicappedby poor availability of high resolution DEMs. This paper presents areview of application of remote sensing and GIS in flood managementwith particular focus on the developing countries of Asia.  相似文献   

Data driven bivariate landslide susceptibility assessment using geographical information systems: a method and application to Asarsuyu catchment, Turkey   总被引：27，自引：0，他引：27  

Mehmet Lütfi Süzen  Vedat Doyuran 《Engineering Geology》2004,71(3-4):303-321

In the last decades, landslide hazard assessment has attracted many researchers' attention. A number of parameters are suggested to be responsible to quantitatively explain the mechanism of landslides; many of these parameters are very important and factual. However, some data types and models are site-specific and could not be applied to different locations. Furthermore, the data stored in continuous parameter maps are divided into a number of classes arbitrarily, depending on the vision of the expert. Basically, this division controls the result of bivariate analysis. Besides, the responsible portion of the parameter map controlling the mechanism is also weighted arbitrarily. Based on these two facts, the class boundaries put a prejudice on the produced susceptibility/hazard maps, which result in dependence on the knowledge of the user rather than being dependent on the data and the fact itself. The aim of this study is to refine the previously defined methods in a more data-dependent trend. To achieve this goal, two new concepts: seed cells and percentile maps are introduced. Seed cells are the zones that are considered to represent the best undisturbed morphological decision rules (conditions before landslide occurs) and would be achieved by adding a buffer zone to the crown and flank areas of the landslide. To quantitatively classify the input parameter maps, the data distributions of seed cells in the parameter maps are divided into a number of classes on the basis of their distribution's percentile break-points upon which the parameter maps are directly dependent on the seed cell distributions, hence to the data itself.  相似文献   

InSAR用于南极测图的可行性研究   总被引：10，自引：1，他引：10  

周春霞  鄂栋臣  廖明生 《武汉大学学报(信息科学版)》2004,29(7):619-623

利用1996年ERS-1／2tandem方式的雷达影像数据进行了生成Grove山数字高程模型的试验研究，并与实测的DEM进行比较分析，论证了利用InSAR技术进行南极测图的可行性。试验证明，在南极研究中，InSAR是一种非常有效的手段，不仅可用于地图制图，而且在冰川动力学、冰貌环境变化等研究领域也有巨大的潜力。  相似文献   

起伏地形下我国太阳直接辐射空间制图   总被引：2，自引：0，他引：2  

王潇宇  邱新法  曾燕  刘绍民  刘昌明 《现代测绘》2004,27(5):15-17,20

建立了起伏地形下太阳直接辐射分布式计算模型 ;成功地解决了起伏地形中地形相互遮蔽对太阳直接辐射影响的难题 ;采用数据集群技术 ,探讨了不同数据集情况下太阳直接辐射计算模式的时空有效性 ;以 1km× 1km分辨率的DEM数据作为地形的综合反映 ,完成了我国 1km× 1km分辨率各月气候平均太阳直接辐射空间分布制图  相似文献   

Methods for the visualization of digital elevation models for landform mapping     

Mike J. Smith  Chris D. Clark 《地球表面变化过程与地形》2005,30(7):885-900

Digital elevation models (DEMs) are increasingly used for landform mapping, particularly with the growing availability of national and global datasets. In this paper we describe a variety of techniques that can visualize a DEM. We then compare five techniques to ascertain which performs the most complete and unbiased visualization. We assess the visualization techniques by comparing landforms mapped from them against a detailed morphological map (derived from mapping of multi‐azimuth relief‐shaded DEMs cross‐checked with stereo aerial photographs). Results show that no single visualization method provides complete and unbiased mapping. The relief‐shaded visualizations are particularly prone to azimuth biasing, although they can highlight subtle landforms. We recommend curvature visualization for initial mapping as this provides a non‐illuminated (and therefore unbiased) image. Initial mapping can then be supplemented with data from relief‐shaded visualizations. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

合肥盆地钻井地层的同位素测年与地层划分   总被引：3，自引：0，他引：3  

徐春华  朱光  刘国生  谢成龙  王勇生  李长城 《安徽地质》2005,15(4):251-255

合肥盆地内部中、新界地层大面积被第四系覆盖，其地层的时代与划分主要依赖已有的6口深井地层资料。由于缺乏可靠的化石记录，这6口深井地层时代与划分一直存在着很大的分歧，制约了对该盆地的油气勘探与远景评价。本文利用这6口深井泥岩类岩屑中自生伊利石，在其结晶度分析基础上，进行了K-Ar同位素测年，成功地获得了不同深度上的地层形成时代。据此地层年龄，文中对这6口深井所钻遇的地层进行了重新的划分。  相似文献