During the wet season the rivers from Queensland flow towards the lake through the Channel Country. These rivers drain about one sixth of Australia, an area the size of Spain. How much water reaches the lake depends on how rain falls in Queensland. Since 1885 the lake has filled in 1886/1887, 1889/1890, 1916/1917, 1950, 1955 and 1974-1976. In 1974 Lake Eyre was deep. Local rain filled Lake Eyre to in 1984 and 1989. Very heavy rain in January 2007 took about six weeks to reach the lake but put only a small amount of water into it. In February 2009, water from flooding rains in Queensland were flowing along the creeks to the lake covering about 40 km per day. The lake fills to about every three years, to , every ten years, and fills up about four times every 100 years.