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[1]LIU Peng,ZHANG Wan-chang.The Month Precipitation in Jinghe River Basin Considering Data-transformation[J].Research of Soil and Water Conservation,2008,15(04):1-4.

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The Month Precipitation in Jinghe River Basin Considering Data-transformation

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 04 Page number: 1-4 Column: Public date: 2008-08-20

Title:: The Month Precipitation in Jinghe River Basin Considering Data-transformation

Author(s):: LIU Peng¹, ZHANG Wan-chang²; 1. International Institute for Earth System Science, Nanjing University, Nanjing 210093, China;
2. START Regional Center for Temperate East Asia, Institute of Atmospheric Physics, CAS, Beijing 100029, China

Keywords:: skewness analysis; data transformation; Ordinary Kriging; Gradient-plus-reverse-distance-squared (GRDS)

CLC:: P426.614

DOI:: -

Abstract:: The skewness, square-root-transformation, cube-root-transformation and logarithm transformation of the monthly precipitation which was from the stations throughout Jinghe river basin from 1951 to 2005 was analyzed fistly. Then, the spatial interpolation of monthly precipitation before and after data transformation was calculated by Ordinary Kriging and Gradient-plus-reverse-distance-squared which were chosen according to the geographical characteristics of the Jinghe River Basin. The cross validation shows that the skewness was not meaningful for spatial interpolation. The logarithm transformation had the best results whether the spatial interpolation was calculated by Ordinary Kriging or Gradient-plus-reverse-distance-squared. The results of Ordinary Kriging were better than that of Gradient-plus-reverse-distance-squared whether the monthly precipitation was tranformated or not. The Ordinary Kriging with logarithm transformation got the best results for daily precipitation spatial interpolation.

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