《Table 3 Statistical characteristics of horizontal soil moisture in dunes of non-subsidence area (co

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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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The spatial distribution characteristics of the horizontal soil moisture in the dunes of nonsubsidence area（control）are shown in Table 3.The horizontal（0-100 cm）soil moisture from the top of the dune to the interdune gradually increased on the whole，the maximum and minimum soil moisture on the top of the dune was 4.94%and 3.54%，respectively，while the maximum and minimum soil moisture in the interdune was 5.88%and 4.40%，respectively.The average soil moisture increased by 13.73%from the top of the dune to the interdune in the whole horizontal soil layer.But from the overall horizontal variation，the variation degree of soil moisture in each layer was slightly different，and its probability curve distribution was normal distribution.The variation of standard deviation was from0.34 to 0.57，the degree of positive and negative deviation was not more than 1，and the coefficient of variation was from 0.07 to0.11，which was consistent with the temporal and spatial variation of soil moisture in Mu Us sandy land[8-14].