FN Archimer Export Format PT J TI La modélisation des " marées vertes " littorales et ses applications TI Modelling Ulva coastal mass blooms with applications BT AF Menesguen, Alain AS 1:1; FF 1:; C1 IFREMER, Centre de Brest, BP 70, 29280 Plouzané , France C2 IFREMER, FRANCE IF 0.043 TC 0 UR https://archimer.ifremer.fr/doc/00480/59125/61753.pdf LA French English DT Article AB Excessive proliferation of UIva sp. (Chlorophyta) during spring and summer was responsible for increasing injuries to recreational use of several beaches of Britanny (France) during the last decade. These worldwide mass blooms are well known in eutrophicated lagoons (Venice, Tunis... ), but look paradoxical along open beaches with large tidal range and weak terrestrial nutrients inputs. Numerical modelling of the coupled physical and biological aspects clearly explains the Ulva mass blooms by the dynamical trapping of water masses in bays where tidal residual drift vanishes, and shows the main responsability of the increase of nitrogen inputs (of agricultural sources) in triggering the recent magnification of a natural phenomenon. PY 1990 PD JUL SO La Houille Blanche SN 0018-6368 PU EDP Sciences IS 3-4 BP 237 EP 242 DI 10.1051/lhb/1990017 ID 59125 ER EF