The results showed that S drought index accorded with drought condition in Altay.
Finally, assessment the model of area covered by drought, the area affected by drought and the economic losses of agriculture by drought is established according the drought index.
Thus the drought area in different regions could be determined and regression equations to estimate surface drought index by vegetation supply water index were established.
A quantitative drought index is necessary for soil water management and crop yield evaluation.
Study on integrated meteorological drought index based on PDSI and SPI
Model for evaluating the regional drought index with the weighted Markov chain and its application
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area appears opposite variation tendency.
There are a few quantitative ones among multitudinous drought indexes and the quantification index based on the soil moisture is less.
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area present opposite variation tendency of phase.
The forecast model of Mean Generation Function (MGF) based on spring drought indexes was able to predict the drought occurrence for the East Gansu Province.
