科学分析降雨分布及合理划分干旱等级，是进行区域水资源优化配置，灌好关键水，减少旱情危害的关键。本文对江西省赣抚平原灌区1978年～2012年气象数据进行分析，研究赣抚平原灌区降雨分布及不同干旱等级分布特征。结果表明，赣抚平原灌区降雨在年内分布不均匀，年总降水量偏度系数偏小，6月～9月份降水量年际偏度系数偏大，年总降水量值、7月、8月和9月降水量值没有明显的趋势性变化；近30多年来受旱年份占比29%，正常年份占比71%；7月份受旱年份较少，以轻旱为主；8月份和9月份受旱年份占比均为34.3%，比较容易受旱。

Scientific analysis of the rainfall distribution and reasonable division of drought grade were the key to optimize the allocation of regional water resources, ensure the most emergent irrigation case, and reduce the harm of drought. Meteorological data of the Ganfu plain irrigation area from the year of 1978 to 2012 was analyzed to research the distribution characteristics of rainfall and different drought grade. The results showed that rainfall distribution during a year was nonuniform, skewness coefficient of annual total rainfall tend to smaller than normal value, annual skewness coefficient of the time interval from June to September tend to more large than normal value. The results showed that there was no significant tendency change in the rainfall data of the annual value, the value of July, August and September. The results which was also derived from the data analysis were that drought year occupied 29% of the latest 30 years, the normal year occupied 71%, and the drought case happened in July was the lowest, most with the light drought, and the percentage of drought condition happened in August and September were both 34.3%, easy to drought.