relation to the different modalities of water logging and nitrate inputs. Non‐submerged,
temporarily submerged, and always submerged, sites are considered in both winter and
summer. It is shown that capacities for epuration are elevated for nitrate loads from the
alluvial aquifer during the lateral transfer of water from agricultural land to the river through
the riparian zone. About 30 m of groundwater flow under the riparian wood studied is …