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[1]HU Zhi-rui,YANG Qin-ke,LIU Jian-fei,et al.Study on the Spatial Interpolation Uncertainty of Soil Steady Water Infiltration Rates[J].Research of Soil and Water Conservation,2009,16(03):48-51,56.

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Study on the Spatial Interpolation Uncertainty of Soil Steady Water Infiltration Rates

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 03 Page number: 48-51,56 Column: Public date: 2009-06-20

Title:: Study on the Spatial Interpolation Uncertainty of Soil Steady Water Infiltration Rates

Author(s):: HU Zhi-rui^1,2, YANG Qin-ke^1,2, LIU Jian-fei^1,2, REN Zong-ping^1,2, WANG Qi^2,3, YAO Zhi-hong^2,3; 1. College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shaanxi 712100, China;
3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Keywords:: spatial interpolation; steady water infiltration rates; uncertainty; Ji river basin

CLC:: S152.7

DOI:: -

Abstract:: This study mainly discuss the spatial interpolation uncertainty of soil steady water infiltration rates in Ji river basin which located in the third vice-area of loess hilly and gully region. Based on the 65 actual measurement points data, the spatial interpolation methods of inverse distance weighted, ordinary kriging and spline are utilized to analyze the impact of sample numbers, cell size of interpolation grid and different interpolation methods on the results of spatial interpolation of steady water infiltration rates. The results are as follows:(1)The more samples in the interpolation, the lower uncertainty reflected by MAE; (2)The variations of cell size from 25 m, 50 m, 100 m, 200 m, 400 m, 800 m does not affect the accuracy remarkably; (3)Different interpolation methods affect the accuracy remarkably, and bring different levels of uncertainty.

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