一个进行标准化降水指数的Fortran程序，可利用一起可能的输入数据预测降雨可能性。-Standardized precipitation index a Fortran program, available with the input data may predict the possibility of rain.

干旱指数运算，程序是根据云南六个站逐月降水平均，求取干旱指数-Drought index operation, the program is based on monthly precipitation average of six stations in Yunnan, to strike a drought index