基于区域气象干旱指数的基本概念和构建方法，计算了中国11个一级气象地理区划的逐日标准化区域气象旱涝强度指数（Regional meteorological Drought Intensity Index，RDI）及标准化区域气象旱涝空间分布差异指数（Regional meteorological Drought variance Index，RDVI），并给出各区域的逐日标准化RDI的旱涝等级划分规则，进一步将区域逐日的RDI和RDVI指数综合使用，对区域气象干旱过程进行较好的分析和判断。通过分析区域RDI和RDVI指数逐日演变，将干旱预警分为三个等级，即红色预警（一级）、黄色预警（二级）和橙色预警（三级），对应于当前时刻的区域RDI指数达到“特别干”、“严重干”和“中等干”等级且未来一周气象干旱等级不会下降，给出了相应的RDVI指数的识别依据，研究了各级区域干旱预警标准，从气象干旱角度进行研究得到的气象干旱预警标准可以为干旱的监测、预警提供科学依据。
Based on the conceptions and methods about regional meteorological drought intensity index, the standardized Regional meteorological Drought Intensity Index (RDI) and Regional meteorological Drought variance Index(RDVI) of eleven first-level divisions of meteorology and geography over China were compuled. When we divide the RDI series by a set of critical points and the mutual information between RDI series and its rank order series reach its maximum, this set of critical points is optimal. By which, we can definite the rank of dry and wet by this set of critical points on RDI series of all Region and get the standards of different rank of drought and flood for each Region. When employing the RDI and RDVI synthetically, we can judge and analysis the process of regional meteorological Drought events. By analysising the daily changes of RDI and RDVI, we research the criterion of regional drought forecast, then divide the regional drought alert into three grade, the No. 1, No. 2 and No. 3 grade corresponding to red, orange and yellow respectively, and also provide the foundation to distinguish three regional drought forecast alert.
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