Accurate identification technology for leakage channels in earth-rock dams through three-dimensional reconstruction and inversion
High-density electrical method is the main technology for detecting leakage in earth-rock dams,but it often lacks precision in identifying the edges of the leakage area and discerning the causes of low resistivity identification.To address this limitation,a precise identification method for leakage channels through three-dimensional reconstruction and inversion is proposed:Multiple 2D parallel survey lines are laid out orthogonal to potential leakage channels,and high-density electrical method inversions are performed.The simplified inversion results are then placed within a three-dimensional model cross-section.Subsequently,the infiltration lines are deduced from the elevation data obtained from multiple survey lines,and a comprehensive analysis is conducted to determine the leakage position.Results demonstrate that this method accurately detects leakage positions,identifies the reasons for low resistivity identification during inversion,provides a more intuitive observation of the direction of leakage channels,and effectively reduces low resistivity identification errors caused by normal seepage.
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