Abstract: Based on the data of daily precipitation,daily mean temperature and the data of rice growth stages of 159 sites in Sichuan province from 1960 to 2010,taking the precipitation anomaly percentage and the relative moisture index as drought index respectively,the probability of each climatic drought level during the rice tillering stage,jointing booting stage and headingflowering stage in Sichuan province was analyzed.The rice climatic drought disaster risk model was constructed with two indexes and assessed the climatic drought risk during whole growth season in Sichuan province.The results showed that the high risk growth stages of rice climatic drought was at rice jointing booting stage and heading flowering stage,there was some differences in the risk zoning between the results of precipitation anomaly percentage and relative humidity index,but the risk distribution trends were similar.From whole rice growth stage,higher risk areas were mainly concentrated in Sichuan basin and northwestern of Sichuan,and the risk of drought in southern was smaller.The research results could help to reduce the losses caused by the drought on rice production,to provide a scientific basis for the rice drought assessment and the development of disaster prevention and mitigation measures.

Key words: Precipitation anomaly percentage, Relative moisture index, Rice, Climatic drought, Risk assessment