169915 20260306154908.0 doi 10.1016/j.geomorph.2026.110228 sideral 148436 ART-2026-148436 eng Pérez-Villar, Guillermo Universidad de Zaragoza (orcid)0000-0002-6607-2395 Erosion rates in rock salt exposures with diverse karren monitored by erosion pins, close-range photogrammetry and terrestrial laser scanner 2026 Published data on solutional erosion in rock salt exposures are scarce, hindering our ability to understand the evolution of emergent salt diapirs with a number of practical implications (e.g. long-term geostorage). The Bofia Gran karst depression at the actively rising Cardona salt diapir (NE Spain) has been used as a test site to assess chemical erosion on a salt outcrop with a wide diversity of karren. Denudation measurements obtained by using erosion pins, terrestrial laser scanner (TLS) and ground-based photogrammetry consistently indicate a robust relationship between rainfall and slope-normal erosion, with an average value of around 10 mm per 100 mm rainfall. The significant variability observed in the surface-normal erosion is mainly controlled by slope gradient and karren micro-topography. Surface-normal erosion increases linearly as the slope declines and the surface area that interacts with rainfall decreases. The comparison of high-resolution point clouds shows that the range of erosion values across specific karren increases with their complexity, with extreme situations found in planar solution bevels and rugged solution flutes. The empirical relationships between slope-normal erosion and both rainfall and slope can be used to model geomorphic evolution in rock salt exposures, as illustrated with the case of the Bofia Gran, where diapiric uplift overwhelms chemical erosion. The experience gained in this investigation suggests that photogrammetry using a conventional camera can be more effective than TLS for assessing erosion in areas on the order of square meters. It also illustrates the benefits of using erosion values normalized to precipitation to enable worldwide comparisons. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/PID2021-123189NB-I00 info:eu-repo/grantAgreement/ES/MICINN PRE2022-101600 info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Gutiérrez, Francisco Universidad de Zaragoza (orcid)0000-0002-5407-940X Benito-Calvo, Alfonso Roqué, Carles 2000 427 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Externa 500 (2026), 110228 [14 pp.] Geomorphology GEOMORPHOLOGY 0169-555X 18519638 http://zaguan.unizar.es/record/169915/files/texto_completo.pdf Versión publicada 2576874 http://zaguan.unizar.es/record/169915/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:169915 articulos driver 2026-03-06-14:50:24 ARTICLE