长江科学院院报 ›› 2010, Vol. 27 ›› Issue (5): 13-18.

• 水土保持与生态建设 • 上一篇    下一篇

江西省土壤抗侵蚀性空间变异表述方法研究

钟壬琳1 ,肖 潇1,2 ,张平仓1 ,岑 奕1   

  1. 1. 长江科学院 水土保持研究所,武汉 430010 ; 2. 华中科技大学 软件学院,武汉 430074
  • 出版日期:2010-05-01 发布日期:2012-07-26

Research on Spatial Variability Statement Methods of Soil Anti-erodibility in Jiangxi Province

ZHONG Ren-lin1 , XIAO Xiao 1 , 2 , ZHANG Ping-cang1 , CEN Yi1   

  1. 1.Yangtze River Scientific Research Institute , Wuhan 430010 , China ; 2.Huazhong University of Science and Technology, Wuhan 430074, China
  • Online:2010-05-01 Published:2012-07-26

摘要: 依据江西省第二次土壤普查资料,以侵蚀 - 生产力评价模型( EPIC )中的 K 值作为土壤抗侵蚀性的衡量指标,通过 ArcGIS9.2 和 GS+9.0 软件,分析比较了反距离权重插值法、径向基函数插值法和普通克里格插值法。对江西省土壤抗侵蚀性空间插值的精度。结果表明:研究区域土壤抗侵蚀性的变化范围为 0.149 2 ~ 0.415 7 ,均值为 0.283 9 ,变异系数为 18.06% ,存在中等程度的空间变异性,块金系数为 11.09% ,具有强烈的空间相关性;综合考虑各种插值方法的交叉验证结果和插值效果,认为普通克里格插值法最佳;研究区域土壤抗侵蚀性的空间分布有从东、南、西向中部、北部和东北部不断减小的趋势,且与各土壤亚类抗侵蚀性均值的空间分布规律趋于一致。

关键词: 土壤抗侵蚀性, 空间插值方法, 空间变异特征

Abstract:  On the basis of the second soil survey data of Jiangxi Province, this paper took K values of EPIC model as measuring indicators of soil anti-erodibility, compared the accuracy of different interpolation methods , including IDW(inverse distance weighted) , Spline and Ordinary Kriging, by the software of ArcGIS9.2 and GS+9.0 for the spatial interpolation of soil anti-erodibility in Jiangxi Province. The results show as follows: The spatial variability of soil anti-erodibility at the study area is moderate difference, with the range from 0.149 2 to 0.415 7, mean of 0.283 9, and variance coefficient of 18.06%. The nugget-to-sill ratio is 11.09%  , which indicates that the soil anti-erodibility has strongly spatial relativity in the study area. Taking account of cross-validation and interpolation results comprehensively, Ordinary Kriging interpolation is the best of three methods. Spatial distribution of soil anti  erodibility appears with the decreasing trend from the east, south, west to the central, north and northeast in the study area; in comparison with the mean of each soil sub-class anti-erodibility, both of them have the same law of spatial distribution.

Key words: soil anti-erodibility , spatial interpolation , spatial variation characteristics

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