“…The internal structure of loess landslides has been investigated and validated using a variety of methods. These include porosity analysis [34][35][36][37], fracture structure assessment [8,15,[38][39][40], landslide geometry evaluation [4,8,36], and investigation of subsurface geological conditions [8,15,17,22,23]. The techniques used include electrical testing [8,20,23,30,34,36], seismic testing [35,[41][42][43][44][45][46][47][48][49][50][51][52][53], mechanical testing [13][14][15]18,19,22,37,38], and borehole data analysis [9,31,43,47...…”