This research aims to develop an effective workflow for detecting concealed shallow karst in pipeline corridors, addressing environmental and structural risks.
Conducted integrated electrical resistivity tomography (ERT) and ambient-noise microtremor (SPAC) surveys in the Huyuanxi area.
Deployed ERT lines with 10 m spacing and inverted resistivity data using Res2Dinv v3.65 software.
Acquired and processed microtremor profiles to analyze subsurface structures and verify drilling accuracy.
Detected low-resistivity anomalies indicating karst features at depths of 10–25 m.
Achieved an accuracy of approximately 81.7% for drilling verifications with an F1-score of 81.1%.
Microtremor-derived depths were consistent with ERT findings, demonstrating effective monitoring strategies.