Abstract: Based on the statistical data of rice planting area and flooding damaged area during the period of 1987-2006 in Hunan Province,the probability of flooding risk of rice production was calculated by using the theory of the fuzzy Mathematics and information diffusion. The flooding risk assessment of rice production and its regionalization were obtained based on GIS. The results showed that the probability of flooding risk of rice production decreased at the different risk grades from the North to the South of Hunan Province. Therefore,the conclusion would give direction in enhancing the awareness of the public to prevent and mitigate disasters,and adjusting the agricultural production structure.

Key words: Information Diffusion, Information Diffusion, Rice production, Flooding, Risk assessment