...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geoderma: An International Journal of Soil Science >A direct comparison of EMI data and borehole data on a 1000 ha data set
【24h】

A direct comparison of EMI data and borehole data on a 1000 ha data set

机译：直接比较1000公顷数据集上的EMI数据和钻孔数据

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Increasingly, the frequency domain electromagnetic induction (EMI) method is used to study soil properties and hydrological properties on different scales. Yet, EMI data are most often used as they are or with the low induction number approximation. Moreover, reported studies have been fairly small ( 100 ha) and to our best knowledge quantitative comparisons with boreholes have not been reported. In the present study we collect, process and invert a 1000 ha EMI data set, and we directly compare the EMI data with borehole data. EMI data were collected with a line spacing of 20 m, resulting in approximately 110,000 processed soundings, which were inverted with a full non-linear algorithm. The EMI results were then evaluated against lithological information from 125 boreholes. The results show that with an EMI instrument we can map the shallow ( 6 m) architecture on small-catchment scale (1000s ha) in a complicated glacial sedimentary environment. The mapping of the geological units was evaluated by a quantitative analysis in which we developed a general methodology for directly comparing EMI results and borehole data. After linking geological units to measured resistivities, we found that 103 out of 125 boreholes were reproduced by the EMI results. We attributed the few non-reproducible boreholes to be caused by local scale geological units, abrupt lateral variations in either geology or resistivity, and inaccurate borehole coordinates. We conclude that EMI can provide the architectural input with the necessary detail and quality to characterize areas of up to 1000s ha.
机译：越来越多地，频域电磁感应（EMI）方法用于研究不同尺度的土壤性质和水文特性。然而，最常使用的EMI数据，因为它们是或具有低感应数字近似。此外，报告的研究已经相当小（＆ 100公顷）并且尚未报告与钻孔的最佳知识定量比较。在本研究中，我们收集，处理和反转1000个HA EMI数据集，我们直接将EMI数据与钻孔数据进行比较。收集EMI数据的线间距为20米，导致大约110,000个加工探测，用全非线性算法反转。然后将EMI结果从125个钻孔的岩性信息评估。结果表明，通过EMI仪器，我们可以在复杂的冰川沉积环境中映射小集距量表（1000s HA）上的浅（＆ 6米）架构。通过定量分析评估地质单位的映射，其中我们开发了一种直接比较EMI结果和钻孔数据的一般方法。在将地质单位连接到测量的电阻之后，我们发现125个钻孔中的103个由EMI结果再现。我们将少数不可重复的钻孔归因于局部尺度地质单位引起的，地质或电阻率的突然变化，并且不准确的钻孔坐标。我们得出结论，EMI可以提供具有必要细节和质量的架构输入，以表征高达1000s HA的区域。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号