Comparison of Kriging Interpolation Precisions in Different Topographical Units and Number of Samples: A Case Study of Spatial Distribution of Soil Total Nitrogen in the Shucheng County, Anhui Province

详细信息   

• 责任者：Lei Nengzhong （Department of Urban Construction and Environment Science ; Anhui University ; Lu’an 237012 ; China） ; Wang Xinyuan
• 刊名：Hydrogeology and Engineering Geology
• 出版年：2008
• 卷期：35(5)
• 关键词：土壤 ; soils ; 安徽 ; Anhui
• 页码：p.86-91
• 图表：3 illus., 3 tables, 25 refs.
• 分类号：1400
• issnNo：ISSN1000-3665
• isbnNo：CN11-2202/P

摘要

A total of 611 soil samples were taken from top soil (0～20 cm deep) for examining the concentration of soil total nitrogen in Shucheng County, Anhui Province. The objectives were to analyze the variation in the precision of Kriging interpolation in different topographical units and number of samples. An analysis of the value of average development of the NRMSE shows that the growth of precision of Kriging interpolation differed significantly among four topographical units, with the highest value in the mountain area and the lowest in the plain. It can be concluded that topography and sampling densities are important factors affecting the accuracy of Kriging interpolation in large land areas.