Analysis and Study on Space Variation Laws of Rainfall of Yuanyang Hani Terrace

In order to analyze and research the space variation laws of rainfall of Yuanyang Hani terrace, monthly average rainfall in this area which was actually measured from 2001 to 2010 of the four typical meteorological sites, Kakou, Xiaoshuijing, Xinjie and 073, was spatial interpolated and its space mutation law was analyzed by using inverse distance weighted method, ordinary Kriging method, the most neighboring method, radial basis function method, and analyzed results of different interpolation methods through cross validation, drawn rainfall isoline maps by utilizing surfer software, spatial distribution of all kinds of interpolation and the actual observation data were compared. The results show that among several interpolation methods, results of Kriging interpolation method was close to variation laws of actual measured data mostly, and its interpolation effect was the best. Meanwhile, through the interpolation analysis, it showed that rainfall of Hani terrace took on strong spatial variability.