• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Symposium on the Application of Geophysics to Engineering and Environmental Problems >STATISTICAL COMPARISON OF METHODS FOR ESTIMATING SEDIMENT THICKNESS FROM HORIZONTAL-TO-VERTICAL SPECTRAL RATIO (HVSR) SEISMIC METHODS: AN EXAMPLE FROM TYLERVILLE, CONNECTICUT, USA
【24h】

STATISTICAL COMPARISON OF METHODS FOR ESTIMATING SEDIMENT THICKNESS FROM HORIZONTAL-TO-VERTICAL SPECTRAL RATIO (HVSR) SEISMIC METHODS: AN EXAMPLE FROM TYLERVILLE, CONNECTICUT, USA

机译：估计沉积物厚度与水平垂直光谱比（HVSR）地震方法的统计比较：来自美国康涅狄格州Tylerville的示例

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Determining sediment thickness and delineating bedrock topography are important for assessing groundwater availability and characterizing contamination sites. In recent years, the horizontal-to-vertical spectral ratio (HVSR) seismic method has emerged as a non-invasive, cost-effective approach for estimating the thickness of unconsolidated sediments above bedrock. Using a three-component seismometer, this method uses the ratio of the average horizontal- and vertical-component amplitude spectrums to produce a spectral ratio curve with a peak at the fundamental resonance frequency. The HVSR method produces clear and repeatable resonance frequency peaks when there is a sharp contrast (>2:1) in acoustic impedance at the sediment/bedrock boundary. Given the resonant frequency, sediment thickness can be determined either by (1) using an estimate of average local sediment shear-wave velocity or by (2) application of a power-law regression equation developed from resonance frequency observations at sites with a range of known depths to bedrock. Two frequently asked questions about the HVSR method are (1) how accurate are the sediment thickness estimates? and (2) how much do sediment thickness/bedrock depth estimates change when using different published regression equations? This paper compares and contrasts different approaches for generating HVSR depth estimates, through analysis of HVSR data acquired in the vicinity of Tylerville, Connecticut, USA.
机译：确定沉积物厚度和描绘基岩地形对于评估地下水可用性和表征污染部位是重要的。近年来，水平到垂直的光谱比（HVSR）地震方法被出现为估计基岩上下未溶解的沉积物厚度的非侵入性，经济有效的方法。使用三分震级计，该方法使用平均水平和垂直分量幅度的比率，以产生具有基本谐振频率的峰值的光谱比率。当沉积物/基岩边界处的声阻抗处于声阻抗的尖锐对比度（> 2：1）时，HVSR方法产生透明和可重复的共振频率峰值。给定谐振频率，使用平均局部沉积物剪切波速度的估计或通过（2）在具有各种范围内的站点的谐振频率观测中产生的幂律回归方程的估计，可以通过（1）来确定（1）的沉积物厚度。已知深入基岩。关于HVSR方法的两个常见问题是（1）沉积物厚度估计的准确程度如何？ （2）沉积物厚度/基岩深度估计在使用不同公开的回归方程时的变化是多少？本文通过分析美国康涅狄格州泰伦维尔附近获得的HVSR数据来比较和对比产生HVSR深度估计的不同方法。

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