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Chinese Journal of Applied Ecology ›› 2005, Vol. 16 ›› Issue (7): 1285-1289.

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Spatial variability of slope land soil solute transport parameters

ZHENG Jiyong1, SHAO Mingan1,2, ZHANG Xingchang1, LI Shiqing 1   

  1. 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Northwestern Sci-Tech University of Agriculture and Forestry, Yangling 712100, China;
    2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy Sciences, Beijing 100101, China
  • Received:2004-06-28 Revised:2004-10-18 Online:2005-07-15 Published:2005-07-15

Abstract: In this paper,the transport parameters of chlorine in a slope land soil were determined in situ by fitting breaking-though curve,and the spatial variability of the parameters in a 41 m×5 m runoff plot was analyzed by using traditional and geo-statistics.The results showed that the average pore-water velocity increased gradually from the top to the bottom of the slope,and the diffusive-dispersive coefficient (D) had no remarkable variation within 20m away from the top but gradually increased with the distance beyond 20m.The dispersivity (α) had the same characteristics as D.The pore-water velocity (v) had a floating feature on the slope,while parameters D and α showed obvious spatial correlation characteristics,the range of the spatial correlation being 21m and 10m,respectively.

Key words: Runoff plot, Transport parameters, Spatial variability

CLC Number: