Photogrammetry for morphometric analysis of anhydrite-gypsum weathering zones

In anhydrite-gypsum weathering zones, two distinct types of dome-shaped landforms, anhydrite hydration features and gypsum tumuli undergo dynamic morphological changes driven by probable volumetric expansion processes. To capture and quantify these changes, we applied a combined UAV-based and terrestrial photogrammetry approach at sites in Canada and Spain (Fig. 1). High-resolution 3D models and digital datasets allowed us to extract key morphometric parameters, such as landform dimensions, cavity volumes, and fracture patterns. Our results highlight photogrammetry as an effective and precise method for monitoring and analyzing the evolution of landforms in evaporite environments.