高空气象探测数据评定方法研究     

Zhang Yongliang 《河南气象》2007,(Z1)

介绍了高空气象探测中数据不确定度的分析方法,并提出优化测量方案。  相似文献   

Analysis of karst hydrodynamics through comparison of dissolved and suspended solids' transport     

Danièle Valdes  Jean-Paul Dupont  Nicolas Massei  Benoît Laignel  Joël Rodet 《Comptes Rendus Geoscience》2005,337(15):1365-1374

In karst systems, rain events often result in a decrease of the conductivity (a tracer of dissolved phase transport) and an increase in turbidity (a tracer of suspended solids transport) at wells and springs. This study shows that the comparison of suspended solids and solute transport by the coupled approach of $T\text{–}C$ curves (Turbidity–Conductivity) and autocorrelations gives evidence of the transport processes in the karst network and allows understanding the karst hydrodynamics. To cite this article: D. Valdes et al., C. R. Geoscience 337 (2005).  相似文献   

Detection of a collision zone in south Indian shield region from magnetotelluric studies     

T. Harinarayana  K. Naganjaneyulu  B.P.K. Patro 《Gondwana Research》2006,10(1-2):48

Magnetotelluric (MT) investigations were carried out along a profile in the greenschist–granulite transition zone within the south Indian shield region (SISR). The profile runs over a length of 110 km from Kuppam in the north to Bommidi in the south. It covers the transition zone with 12 MT stations using a wide-band (1 kHz–1 ks) data acquisition system. The Mettur shear zone (MTSZ) forms the NE extension of Moyar–Bhavani shear zone that traverses along the transition zone. The regional geoelectric strike direction of N40°E identified from the present study is consistent with the strike direction of the MTSZ in the center of the profile. The 2-D conductivity model derived from the data display distinct high electrical resistivity character (10,000 Ω m) below the Archaean Dharwar craton and less resistive (< 3000 Ω m) under the southern granulite terrain located south of the MTSZ. The MTSZ separating the two regions is characterized by steep anomalous high conductive feature at lower crustal depths. The deep seismic sounding (DSS) study carried out along the profile shows dipping signatures on either side of the shear zone. The variation of deep electrical resistivity together with the dipping signature of reflectors indicate two distinct terrains, namely, the Archaean Dharwar Craton in the north and the Proterozoic granulite terrain towards south. They got accreted along the MTSZ, which could represent a possible collision boundary.  相似文献   

二维中值滤波在电磁测深曲线去噪中的应用   总被引：4，自引：2，他引：2  

邵敏  何展翔  张立恩 《物探化探计算技术》2001,23(3):226-231

作者针对目前点距较密的电磁测深（如CEMP）数据处理问题,提出并应用二维中值滤波方法进行数据处理,通过与传统去噪方法相比较,该方法对于压制或消除实测数据中的随机干扰以及强工业电磁干扰的效果更好,同时对于压制静态位移也有明显的作用。  相似文献   

三维地电模型数值模拟中视电阻率真假异常特征分析   总被引：2，自引：0，他引：2  

强建科  阮百尧  熊彬 《CT理论与应用研究》2002,11(1):6-9

本文概要介绍了三维数值模拟中双网格系统的剖分方法,并通过几种典型模型的有限单元法三维数值模拟计算（网格单元电导率分块均匀、电位三线性变化）,充分揭示了对称四极电阻率测深法三维地电模型视电阻率真假异常的分布规律,分析了产生真假异常的原因,并研究了真异常的形态与引起真异常的地质体位置的关系。  相似文献   

Geophysical Investigations Of Seismically Induced Surface Effects: Case Study Of A Landslide In The Suusamyr Valley, Kyrgyzstan     

H.-B. Havevith  D. Jongmans  K. Abdrakhmatov  P. Trefois  D. Delvaux  I.A. Torgoev 《Surveys in Geophysics》2000,21(4):351-370

In summer 1998, a geophysical survey including seismic profilesand electrical tomography has been carried out in the Suusamyr valley, Kyrgyzstan. The scope wasto investigate surface effects induced by the Ms = 7.3 Suusamyr earthquake, the 19th of August, 1992. Inthis paper, special attention is paid to the case study of a debris slide triggered by the earthquake.Seismic data are analysed by P-wave refraction technique and by surface wave inversion. Electrical tomographicprofiles are processed by 2D-inversion.Using geotechnical and geological information, P-velocity modelsand resistivity sections are interpreted in terms of geological materials, in order to build a geological3D model. On the basis of the latter, we carried out static finite element computations as well as staticand pseudo-static calculations with Janbus method. Newmark displacement was computed, considering or notthe influence of the shallow soft deposits. The results are compared to the real displacementobserved in the field and conclusions are drawn about the mechanism of the landslide.  相似文献   

计算部分熔融岩石电导率方法的综述   总被引：1，自引：3，他引：1       下载免费PDF全文

黄晓葛  白武明  兰从欣 《地球物理学进展》2005,20(3):635-639

部分熔融岩石的电导率是由固体岩石的低电导率和硅酸盐熔体的高电导率组成，因此熔体的几何形态和空间分布对部分熔融岩石的电导率将产生重大影响.本文介绍了熔体在岩石中的分布特征和它们的几何分布形态，同时，评述了各种数学模型在模拟计算部分熔融岩石电导率中的优缺点.  相似文献   

八家子铅锌矿电阻率异常特征及深部和外围找矿   总被引：6，自引：1，他引：6  

黄力军  陆桂福  张强  梅岩辉  张光弟 《物探与化探》2005,29(2):119-121

以可控源音频大地电磁测深方法应用为例,讨论辽宁省八家子铅锌矿深部及外围电阻率测深找矿问题。  相似文献   

应用可控源音频大地电磁测深于北京水文地质勘查   总被引：7，自引：1，他引：7  

徐光辉  黄力军  刘瑞德 《物探与化探》2005,29(6):523-525

北京市周边地区利用的深部地下水资源大多采自断裂构造破碎带或岩溶裂隙, 地热资源主要开发蓟县系白云岩岩溶裂隙水, 断裂构造型地下热水开发的相对较少。通过实例, 论述可控源音频大地电磁测深法在断裂构造型地热资源、岩溶破碎和断裂构造型地下水资源方面的作用和应用效果。  相似文献   

淮北煤田松散层电性特征及富水性评价   总被引：1，自引：0，他引：1  

潘启章吴有信  于联盟王玉珏 马克娜 《中国煤田地质》2005,17(5):107-110,130

根据淮北平原电测深资料结合钻探工作,评述了第四系松散层中砂质类和粘土类的电性特征及分布规律,对松散层中含水层各岩性的电性影响因素进行了分析,认为视电阻率与含砂量和颗粒度与正比,与矿化度成反比;介绍了含水层富水性特征参数的提取方法及电性参数与水文地质参数相关关系,认为视电阻率与含水层的渗透系数成正比.通过对电性资料的认识和区域水质资料的分析,获得了该区面积性水文地质参数.该区富水性评价成果已被实际水文地质资料验证.  相似文献