Engineer at CNRS, geographer, Jean Nabucet, 38, is preparing to share his passions. On October 6, on the occasion of the second edition of the CNRS Unusual Tours (from October 1 to 11, 2021), he will take visitors drawn by lot to his favorite playground: the Saint-Martin meadows of Rennes. A former industrial wasteland of 30 hectares, converted into a natural park.
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This area of high plant density, framed by a canal, a natural arm of the Ille (tributary of the Vilaine), a lock and an interior boulevard, has aroused the interest of Jean Nabucet and other researchers in the laboratory for several years. coastline, environment, remote sensing, geomatics ”(LETG), a joint research unit on interactions between nature and society.
Invite visitors to take a fresh look at the city
“The CNRS has mobilized us in this area, which it has labeled“ workshop zone ”, in order to focus, in particular, on the explosion in the consumption of agricultural land by cities, explains this geographer. The Saint-Martin meadows are an emblematic site, which has kept pace with the major trends in land consumption since the beginning of the 20th century. After having housed industrial activities, they hosted allotments in the interwar period, then were surrounded after the Second World War by the construction of numerous housing units. “
But at the end of the 1990s, significant floods from the Ille flooded the town. We then realize that these floodplain meadows can serve as protection in the city center. “For us, that was the trigger,” recalls Jean Nabucet. Thanks to this “workshop area”, we started to think about the possible instrumentation of the site. We sensed major changes. “
The involvement of several disciplines (art, climatology, ecology, geography) makes it possible to collect very diverse data: uses by humans, species present, changes in the seasons, etc. The crossing of these data reveals rhythms of social and ecological uses, which question the notions of resilience and recovery of an ecosystem subjected to strong anthropogenic constraints. Jean Nabucet is therefore delighted to invite his visitors to take a new look at the city.