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Map of the Garonne–Dordogne River basin in southwestern France, where most of our fieldwork is conducted. The map notably indicates (i) the two main rivers within the basin (the Garonne River and the Dordogne River), (ii) two rivers that we surveyed for up to 15 years (the Viaur River and the Célé River), and (iii) our two host institutions (the University of Toulouse and the SETE laboratory)
