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Epikarst water detection using integrated geophysical methods.

Chengliang Du1, Yixiang Chen2,3, Hua Xie1

  • 1Guang Xi Polytechnic of Construction, Nanning, 530007 China.

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|August 4, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces differential filtering and an integrated geophysical method system to accurately locate epikarst water. The new approach overcomes interference from background fields, improving detection accuracy for groundwater exploration.

Keywords:
Differential filtering methodEpikarst waterGuangxiMethod systemSelf-potential method

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Area of Science:

  • Geophysics
  • Hydrogeology
  • Environmental Science

Background:

  • The self-potential (SP) method is valuable for detecting epikarst water.
  • Regional background fields (geological noise, electromagnetic interference) cause inaccurate anomaly localization in SP surveys.
  • Accurate localization of epikarst water is crucial for resource management and infrastructure development.

Purpose of the Study:

  • To develop a method for accurately locating epikarst water anomalies detected by the self-potential method.
  • To mitigate the effects of background field interference on anomaly center location.
  • To enhance the reliability of geophysical prospecting for subsurface water resources.

Main Methods:

  • Differential filtering was applied for data processing to achieve smoothing and low-pass filtering effects.
  • An integrated method system was proposed, combining differentially filtered horizontal SP gradient data, the composite profile method, and the high-density electrical method.
  • The integrated system leverages anomalous features of different physical parameters for improved localization.

Main Results:

  • Differential filtering effectively extracts meaningful anomalies by reducing noise.
  • The integrated method system demonstrated a significant improvement in the accuracy of anomaly localization.
  • Field application at the Xiaguantun test site confirmed the effectiveness and feasibility of the proposed system.

Conclusions:

  • The differential filtering method is effective in processing self-potential data for epikarst water detection.
  • The integrated geophysical method system provides a robust solution for accurate epikarst water localization.
  • This approach enhances the precision of geophysical prospecting, aiding in the effective management of groundwater resources.