Spatial variability of soil moisture in a mining subsidence area of northwest China
Lu Bai1
Yajing Wang2
Kai Zhang2
Yingming Yang3
Kaikai Bao2
Jiangang Zhao2
Xiaonan Li2
1.School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing 102211,China2.School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China3.State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing 102211,China
摘要：The current study investigated the impact of coal mining on deep soil moisture from the perspective of the absolute value of soil moisture.A combined classical statistics and multi-dimensional geo-statistics approach was employed to analyze the temporal and spatial changes in soil moisture from 0 to 10 m in the mining face of the Nalin River No.2 Mine in North-west China from the perspective of spatial variability.The results of the study show that compared with the control area,the average value of soil moisture in 1-and 2-year subsidence areas decreased by 1.18％and 0.96％,respectively,whereas the coefficient of variation increased by 17.92％and 3.63％,respectively.Interpolation of soil moisture spatial distribution results showed that the spatial variability of soil moisture in the control area was less than that in the subsidence areas,and the spatial variability of soil moisture in the 2-year subsidence area was less than that in the 1-year subsidence area,indicat-ing that mining increases the spatial variability of soil moisture and that the degree of spatial variability of soil moisture decreases as the subsidence enters the stable period.These results provide evidence for the mechanism by which coal mining subsidence affects soil moisture.Preferential flow caused by surface cracks,soil texture,the soil pore microstructure,and other factors in the coal mining subsidence area are the primary drivers of the increase in spatial variability of soil moisture.
机标关键词：variabilityspatialsoilchinaareaminingmoisturenorthwest
论文发表日期：2022-10-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：12( 160-171 )
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