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[1]YIN Hui,LI Hui,JIANG Zhong-cheng,et al.Study on Spatial Pattern of Soil Thickness in Typical Karst Area in Guangxi Based on ‘3S’ Technology[J].Research of Soil and Water Conservation,2014,21(06):25-29.

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Study on Spatial Pattern of Soil Thickness in Typical Karst Area in Guangxi Based on ‘3S’ Technology

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 25-29 Column: Public date: 2014-12-28

Title:: Study on Spatial Pattern of Soil Thickness in Typical Karst Area in Guangxi Based on ‘3S’ Technology

Author(s):: YIN Hui¹, LI Hui^2,3, JIANG Zhong-cheng³, YANG Qi-yong³; 1. Tourism Department, Huizhou University, Huizhou, Guangdong 516007, China;
2. College of Environment & Resources, Guangxi Normal University, Guilin, Guangxi 541004, China;
3. Institute of Karst Geology, CAGS, Guilin, Guangxi 541004, China

Keywords:: soil; thickness; spatial autocorrelation; spatial variability; typical karst area

CLC:: S159

DOI:: -

Abstract:: By using geo-statistics and GIS, combining indoor sampling point distribution and field monitoring of soil thickness in typical karst area of Guohua demonstration zone in Guangxi, the spatial pattern characteristics of soil thickness were studied. The results showed that the spatial distribution of soil thickness showed obviously positive global spatial autocorrelation. The spatial autocorrelation distance of soil thickness was 2 200 m. The ‘low-low’ spatial agglomeration was the main spatial distribution type, showing two types of spatial structures: the one was spatial agglomeration between 1 m to 2 200 m in spatial distances, the other was spatial isolation between 2 200 m to 2 800 m in spatial distances. Soil thickness of the semivariance function models was well in accord with spherical model. The minimum spatial variable scale of soil thickness was nearly 500.0 m, which could be served as the best interval of soil thickness for sampling point distribution in Guohua demonstration zone. The soil thickness showed uneven banded, arc-shaped and small amounts of porphyritic distribution, and the gradient distribution was obvious. This paper is of great theory and reference significance to guide agricultural production, to manage desertification, and to reconstruct the ecology in typical karst peak cluster-depressions of Guohua demonstration zone and other similar karst areas.

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