Temporal and Spatial Distribution Characteristics of Rainfall in Shandong Province

Using 22 meteorological stations in Shandong Province and 4 meteorological stations in Henan Province during 1961—2011 annual rainfall datas to create voronoi diagram rainfall distribution model,and with the help of a polynomial fitting curve method and inverse distance weighted interpolation analysis methods,such as to conduct the thorough research to the rainfall temporal and spatial distribution characteristics in Shandong Province.Results showed that in the recent 50 years,rainfall in Shandong Province were significant on the space change of gradient,from southeast to northwest gradually decreased;and had a certain age,interannual variability,the overall showed an increasing trend decreased first then increased.