RETURN Winterschool 2026 (April 7–9) The central Altiplano: The challenge of water in an agro-mining landscape 4 days of field excursions (base camp in Oruro) + 1 day restitution: Day 1 (Monday, June 29): > Trip to Oruro (morning) Archeology: Visit to the Palaspata site (C. Delaere & Capriles) Day 2 (Tuesday, June 30): Water geochemistry (As & others): Visit of Oruro mine & Vinto Smelter (Resongles, & Ormachea) Day 3 (Wednesday, July 1): Morning: River éco-hydrology & ecology of Bofedales @ Cala-cala (Molina, Meneses & Zeballos) Afternoon: Bofedale as paleo-environmental archives (Domic, Guiter, Guédron & Brousset) Day 4 (Thursday, July 2): Morning: Visit of an agricultural land (plastics & salinization – Satge) Afternoon: Exchange with local communities @ Machacamarca (Satge, Le Gouill, N. Laborie) Day 5 (Friday, July 3): Morning: Synthesis & restitutions > Trip to La Paz (afternoon)