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Study on Spatial Variation of Soil Moisture in Coal Mining Subsidence Area in Mu Us Sandy Land

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  • ZHAO,Guoping
  • WANG,Haiyan
  • LI,Junbao
  • GUO,Hui

Abstract

In order to explore the spatial distribution and variation characteristics of soil moisture in coal mining subsidence area in Mu Us sandy Land, and provide theoretical basis for the restoration of the mining area, experiments based on a linear sampling and classic statistical and geostatistical methods were conducted. Spatial distribution characteristics and variation of soil moisture in the typical 0 to 100 cm dune area in the subsidence area and the non-subsidence area (control) were studied. The results showed that in the typical sand dune location of non-subsidence area (control), the probability distribution curves of soil moisture changes in all layers along vertical and horizontal directions were all normal distribution, and it was consistent with the temporal and spatial variation characteristics of soil moisture in conventional dunes in Mu Us sandy land. By contrast, two years after the coal mine collapsed, the variations of soil moisture in different layers along vertical and horizontal directions were different, and soil moisture loss was more serious than that of control dune by nearly 10% to 30%, and the standard deviation varied from 0.54 to 1.05, increasing by 52.08% compared with the non-subsidence area (control). The probability of positive and negative deviation greater than 1 was over 50%, and the coefficient of variation varied from 0.14 to 0.28, which was 80% higher than that of non-subsidence area (control). After collapsing, the average level of soil moisture, standard deviation, variance and variation coefficient had greatly changed, and influence of coal mining subsidence on soil moisture was the most in the middle layer (30—70 cm), and was not obvious in the surface (0—20 cm) and lower layer (80—100 cm). In coal mining subsidence area, the dispersion degree of soil moisture in different layers along the vertical and horizontal direction was greatly improved, which increased spatial variation of soil moisture.

Suggested Citation

  • ZHAO,Guoping & WANG,Haiyan & LI,Junbao & GUO,Hui, 2018. "Study on Spatial Variation of Soil Moisture in Coal Mining Subsidence Area in Mu Us Sandy Land," Asian Agricultural Research, USA-China Science and Culture Media Corporation, vol. 10(03), March.
    • Handle: RePEc:ags:asagre:275811
    DOI: 10.22004/ag.econ.275811
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    Cited by:

    1. Jing Jiang & Qian Wang & Jinmei Zhao & Jun Zhang & Bo Dong & Xin Huang, 2023. "Construction and Application of Ecological Remediation Technology for Sandy Soils in Northwest China," Sustainability, MDPI, vol. 15(20), pages 1-17, October.

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    Keywords

    Agribusiness;

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