The present invention relates to a dam safety management system, and more specifically, to a digital twin-based intelligent dam safety management system that can significantly improve speed, accuracy, and efficiency through technological advancement of dam infrastructure safety inspection and facility management. will be. To this end, the present invention establishes a 3D dam modeling based on an image captured by at least one of a drone and a photographing means for a dam in which a measuring means is installed in a facility, and subdivides the 3D dam modeling for each management area unit, 3D a digital twin generation module for displaying at least one of facility information and measurement information of a measurement means on the dam modeling; The flight path information is stored for each management area unit and the image taken by a drone equipped with a thermal imaging camera is mapped to 3D dam modeling, and the 3D dam modeling before and after mapping is compared and expressed while leaking or leaking the dam through the thermal image orthographic image. a 3D modeling mapping module that enables confirmation of white changes; and a concrete crack identification module for determining concrete cracks by analyzing the dam concrete structure image taken by the drone in a deep learning method.
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