Grey Correlation Analysis of Tropical Cyclone Landing Time

The ratio of natural disaster and tropical cyclone economic loss is above 85% in Zhejiang recently. It has a realistic meaning that studying development situation of tropical cyclone in order to analyze factor's relevance and find main factor. According to the grey correlation analysis work principle, studying tropical cyclone landing time distribution is put forwards into application in this paper. This paper choose the sum of tropical cyclone in Zhejiang as study object, calculate correlation coefficient and correlation degree of the tropical cyclone sum and appeared time, determine disaster main period so as to provide a timely solution.