Chakra C. A. auteur aut IRD Gascoin S. auteur aut IRD Somma J. auteur aut IRD Fanise Pascal auteur aut IRD Drapeau Laurent auteur aut IRD text journalArticle eng text/pdf reformatted digital access Lebanon has experienced serious water scarcity issues recently, despite being one of the wealthiest countries in the Middle East for water resources. A large fraction of the water resources originates from the melting of the seasonal snow on Mount Lebanon. Therefore, continuous and systematic monitoring of the Lebanese snowpack is becoming crucial. The top of Mount Lebanon is punctuated by karstic hollows named sinkholes, which play a key role in the hydrological regime as natural snow reservoirs. However, monitoring these natural snow reservoirs remains challenging using traditional in situ and remote sensing techniques. Here, we present a new system in monitoring the evolution of the snowpack volume in a pilot sinkhole located in Mount Lebanon. The system uses three compact time-lapse cameras and photogrammetric software to reconstruct the elevation of the snow surface within the sinkhole. The approach is validated by standard topographic surveys. The results indicate that the snow height can be retrieved with an accuracy between 20 and 60 cm (residuals standard deviation) and a low bias of 50 cm after co-registration of the digital elevation models. This system can be used to derive the snowpack volume in the sinkhole on a daily basis at low cost. specialized snow time-lapse camera photogrammetry structure-from-motion water resource LIBAN 062 126 19 18 art. 3890 [16 ] 2019 https://www.documentation.ird.fr/hor/fdi:010077105 10.3390/s19183890 [F B010077105] https://www.documentation.ird.fr/hor/fdi:010077105 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers19-10/010077105.pdf IRD - Base Horizon / Pleins textes 2019-11-05 2025-02-24 fdi:010077105 fre