Spatial Variability Of Reconstructed Soil Properties In Opencast Coal Mine Dump In Loess Area Based On Multi-fractal Theory

Reconstruction of a soil suitable for vegetation growth is the core mining land reclamation work. Surface mine dump, influenced rehearsal, compaction and other activities to make significant changes in the original soil characteristics. Effective understanding dump field spatial variability of soil characteristics condition for selecting appropriate land reclamation measures have an important role. In this paper, within Antaibao Dumping Site for the study area, through the introduction of multi-fractal theory and joint multi-fractal theory, combining traditional geostatistical methods for spatial variability of soil properties reconstruct its different characteristic parameters of space autocorrelation analyzes. Study results obtained are as follows:(1)Soil properties determined in study area showed: soil particles multifractal parameters,soil texture, organic matter, total coefficient of variation is between 10%-90%, showed moderate variation.(2)Soil particles in the study area exhibit distinct multifractal characteristics, capacity dimension D(0), entropy dimension D(1), D(1)/D(0), multifractal spectrum spectral width Δα and symmetry Δf(α) can reflect the heterogeneity characteristics of soil particle size distribution from different angles.(3)The structure of space Semivariance resulting analysis, D(0) in the 0-20 cm soil layer, D(1) in the space 20-40 cm soil layer of strong autocorrelation, D(0) in the 20-40 cm soil layer, D(1) in the 0-20 cm soil layer, D(1)/D(0) in the 0-20 cm and 20-40 cm soil layer of soil, Δα at 0-20 cm soil and 20-40 cm soil layer, Δf(α) in 20-40 cm soil layer with moderate spatial correlation, Δf(α) in the space of 0-20 cm soil layer of relevance weakest.(4)Soil particles in the study area multifractal parameters showed significant spatial distribution pattern, in addition to the parameter Δα, the parameter D(0), D(1), D(1)/D(0), Δf(α) variability increased with depth decreases.(5)Joint multifractal Results Show: the content of sand and clay content spatial variability strong, silt, organic matter and nitrogen content of the spatial variability of weaker; in 0-20 cm, 20-40 this cm two soil, organic matter content, total nitrogen content, soil particle size distribution fractal dimension of the relationship between form spatial variability between more closely.(6)With respect to the previous research this paper, multifractal theory can better complexity, the degree of irregularity and uneven degree of soil structure analysis; joint multi-fractal theory analysis of the relationship between the spatial variability of soil properties of soil, more accurately reflect the relationship between the variables corresponding to the spatial variability on multiple scales.