水土保持学报2017，Vol.31Issue(6)：90-93,219,5.DOI:10.13870/j.cnki.stbcxb.2017.06.015
毛乌素沙地采煤塌陷区土壤水分空间变异研究
Spatial Variability of Soil Moisture in Coal Mining Subsidence Area in Mu Us Sandy Land
摘要
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 law of soil water in the typical 0 to 100 cm dune area in the subsidence and the non-collapse (control) were studied.The results showed that in the typical sand dune location of non-collapse (control),the probability distribution curves of soil water 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.In contrast,two years after the coal mine collapsed,the variations of soil water in different layers along vertical and horizontal directions were different,and soil water 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-collapse area (control).After collapsing,the average level of soil water,standard deviation,variance and variation coefficient had great changed,and influence of coal mining subsidence on soil moisture was the most in the middle layer (30-70cm),and was not obvious in the surface (0-20 cm) and lower (80-100 cm).In coal mining subsidence area,the dispersion degree of soil water in different layers along the vertical and horizontal direction was greatly improved,which enhanced spatial variation of soil water.关键词
采煤塌陷/土壤水分/空间变异/毛乌素沙地Key words
coal mining subsidence/soil moisture/spatial variation/Mu Us sandy land分类
农业科技引用本文复制引用
赵国平,史社强,李军保,董敏..毛乌素沙地采煤塌陷区土壤水分空间变异研究[J].水土保持学报,2017,31(6):90-93,219,5.基金项目
国家自然科学基金项目(41661062) （41661062）
陕西省科学技术研究发展计划项目(2014KJXX-21) （2014KJXX-21）
陕西省自然科学基金项目(2014jm5126) （2014jm5126）
