Method for monitoring deformation of earth-rock dam based on GNSS and unmanned aerial vehicle oblique photogrammetry

Abstract

The application discloses a method for earth-rock dam deformation monitoring based on GNSS and unmanned aerial vehicle oblique photogrammetry, which comprises earth-rock dam Beidou GNSS monitoring data and unmanned aerial vehicle oblique photogrammetry data, and is characterized in that: a plurality of reference monitoring points and a plurality of unmanned aerial vehicle detection points are arranged in the earth-rock dam; dam body deformation monitoring values obtained by Beidou GNSS and dam body deformation measurement values obtained by unmanned aerial vehicle oblique photogrammetry are obtained at the reference monitoring points; only dam body deformation measurement values obtained by unmanned aerial vehicle oblique photogrammetry are obtained at the unmanned aerial vehicle detection points; a reference point correction coefficient is calculated at each reference monitoring point; a detection point correction coefficient is calculated at each unmanned aerial vehicle detection point; and a dam body deformation correction value of each unmanned aerial vehicle detection point is calculated according to the detection point correction coefficient. The method utilizes the high precision of GNSS monitoring data and the large-range data of unmanned aerial vehicle oblique photogrammetry, realizes the complementary advantages, and obtains wide-range, multi-point and high-precision earth-rock dam deformation monitoring of the dam.