The Correlation Analysis between 5mm and over Precipitation Days and Drought/flood in Lhasa
The severity of drought/flood is divided by Z index in flood season in Lhasa,Tibet. Then the correlation between 5mm and over precipitation equivalent days and the drought/flood severity was studied. Results show that the severity which determined by Z index tally with the facts. The 5mm and over precipitation equivalent days not only indicate the precipitatiion in flood season but also express high correlation with drought/flood severity.