Original: In dry years, the Lachlan can have periods of zero flow of over a year (for example from April 1944 to April 1945), which is a complete contrast to the Murray and Murrumbidgee which have not been known to cease to flow since European settlement.
Simplified: In dry years, for example April 1944 to April 1945, the Lachlan may have no water flowing in it at all.