Année,Périmètre de protection d’une réserve naturelle nationale,Réserve biologique intégrale,Réserve biologique dirigée,Zone humide protégée par la convention de Ramsar,Arrêté de protection de biotope,Terrain acquis par le Conservatoire du Littoral,Réserve naturelle nationale,Réserve nationale de chasse et de faune sauvage              
            1955,,,,,,,,1.11
            1956,,,,,,,,1.11
            1957,,,,,,,,1.11
            1958,,,,,,,,1.11
            1959,,,,,,,,1.11
            1960,,,,,,,,1.11
            1961,,,,,,,,1.11
            1962,,,,,,,,1.11
            1963,,,,,,,,1.11
            1964,,,,,,,,1.11
            1965,,,,,,,,1.11
            1966,,,,,,,,1.11
            1967,,,,,,,,1.11
            1968,,,,,,,,1.11
            1969,,,,,,,,1.11
            1970,,,,,,,,1.11
            1971,,,,,,,,1.11
            1972,,,,,,,,1.11
            1973,,,,,,,,1.11
            1974,,,,,,,0.74,1.11
            1975,,,,,,,0.74,1.11
            1976,,,,,,,0.74,1.11
            1977,,,,,,0.02,2.80,1.11
            1978,,,,,,0.02,2.80,1.11
            1979,,,,,,0.02,4.01,1.11
            1980,,,,,,0.02,4.41,1.11
            1981,,,,,,0.02,4.41,1.11
            1982,,,,,,0.02,4.41,1.11
            1983,,,,,0.11,0.02,4.41,1.11
            1984,,,,,0.77,0.02,4.41,1.11
            1985,,,,,0.77,0.02,4.41,1.11
            1986,,,,,0.81,0.02,4.41,1.11
            1987,,,,,1.02,0.02,4.41,1.11
            1988,,,,,1.08,0.02,4.41,1.11
            1989,,,,,1.09,0.02,4.41,1.11
            1990,,,,,1.12,0.02,4.41,1.11
            1991,,,,0.42,1.13,0.02,4.54,1.11
            1992,,,,0.42,1.13,0.04,4.65,1.11
            1993,,,,0.42,1.13,0.04,4.65,1.11
            1994,,,,0.42,1.27,0.04,4.65,1.11
            1995,,,0.05,0.42,1.27,0.04,4.65,1.11
            1996,,,0.05,0.42,1.27,0.04,4.65,1.11
            1997,,,0.05,0.42,1.29,0.04,4.65,1.11
            1998,,0.02,0.06,0.42,1.33,0.04,4.65,1.11
            1999,,0.02,0.06,0.42,1.33,0.04,4.65,1.11
            2000,,0.02,0.06,0.42,1.33,0.04,4.65,1.11
            2001,,0.02,0.06,0.42,1.33,0.04,4.65,1.11
            2002,,0.02,0.06,0.42,1.34,0.05,4.65,1.11
            2003,,0.02,0.06,0.42,1.34,0.05,4.65,1.11
            2004,,0.02,0.06,0.42,1.34,0.05,4.65,1.11
            2005,,0.02,0.06,0.42,1.43,0.06,4.65,1.11
            2006,,0.02,0.06,0.42,1.43,0.06,4.65,1.11
            2007,,0.02,0.06,0.42,1.43,0.06,4.65,1.11
            2008,,0.02,0.06,1.12,1.43,0.06,4.65,1.11
            2009,,0.02,0.06,1.12,1.43,0.06,4.65,1.11
            2010,,0.02,0.06,1.12,1.43,0.06,4.65,1.11
            2011,,0.02,0.06,1.12,1.43,0.06,4.65,1.11
            2012,,0.02,0.06,1.12,1.45,0.06,4.65,1.11
            2013,,0.02,0.06,1.12,1.45,0.06,4.65,1.11
            2014,,0.02,0.06,1.12,1.46,0.06,4.65,1.11
            2015,0.00,0.02,0.06,1.12,1.47,0.06,4.65,1.11
            2016,0.00,0.02,0.06,1.12,1.58,0.06,4.65,1.11
            2017,0.00,0.02,0.06,1.12,1.58,0.06,4.65,1.11
            2018,0.00,0.02,0.06,1.12,1.68,0.06,4.65,1.11