Rainfall Characteristic in the East Region of the Yellow River of Gansu Province

Applying the automatical recording rainfall data of recently 15 year on 19 meteorology stations in the east region of the Yellow River of Gansu Province,the paper analyzes the scattering characteristic and occring number of rainfall under different rainfall-duration and-intensity between June and September. It is also made preliminary analysis about the comprehensive effect of rainfall-duration and-intensity on the rainfall.