El Niño  driven Drought.

Annual Rainfall deviations from Average for Romsey Australia.

Note the 12 year interval between major droughts as mentioned by   Charles Sturt in 1826

Secondary Droughts

El Niño Years
1902-1903	1905-1906	1911-1912	1914-1915
1918-1919	1923-1924	1925-1926	1930-1931
1932-1933	1939-1940	1941-1942	1951-1952
1953-1954	1957-1958	1965-1966	1969-1970
1972-1973	1976-1977	1982-1983	1986-1987
1991-1992	1994-1995	1997-1998	2002-2003
2006-2007

12 year interval between Major Drought cycle for Romsey Australia highlighted in red.