“…However, such methods have limitations regarding safety and access to the sites. Current trends to estimate these volumes use remote sensing tools such as airborne lidar scanners (Zhao, 2016), stereo-photogrammetry from planes and UAVs (He et al, 2019, Fawzy, 2015, Uysal et al, 2015, Raeva et al, 2016, Tucci et al, 2019, Salim et al, 2017, and even photogrammetry from satellite imagery (Schmidt et al, 2015, Demirel et al, 2011, Ge et al, 2007, Salim et al, 2017.…”