The anomalisticyear is the time between successive transits of the Earth through the perihelion.
近点年是地球连续两次通过近日点之间的时间。
At the same time, by comparing with the circulation of the historical anomalistic serious drought year (1973) and heavy flood year (1954, l930), the author points cut the difference between them and suggests some cruses of the anomalistic heavy flood in 1991.