precipitation index
2.8 降水量指标 （precipitation index） 根据前5天累计降水和当日日降水量划分的降水条件的指标。
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类似于降水量Z指标法对旱情的监测，进行了云参数监测旱情的研究，建立了云量监测的Z指标法。
Similar to the method of Z index of precipitation, a trial research is made on monitoring drought by the amount of cloud, and the method of Z index of cloud amount is established.
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