本文選題：土地復(fù)墾 + CT掃描��； 參考：《土壤通報(bào)》2017年04期

【摘要】：土壤孔隙對(duì)水分、養(yǎng)分的運(yùn)移起著重要作用,重構(gòu)土壤孔隙狀況反映著復(fù)墾土壤質(zhì)量的高低。本研究基于Math Works Matlab(2009a)平臺(tái),在對(duì)土壤孔隙CT掃描圖片三維重建的基礎(chǔ)上,運(yùn)用多重分形理論對(duì)安太堡露天煤礦不同復(fù)墾年限排土場(chǎng)重構(gòu)土壤(23年、20年、0年)以及原地貌土壤進(jìn)行三維多重分形定量表征,以探討重構(gòu)土壤孔隙空間分布規(guī)律。結(jié)果表明:重構(gòu)土壤孔隙三維結(jié)構(gòu)具有多重分形特征,信息熵維D1、廣義維數(shù)譜曲線彎曲程度△D、多重分形譜譜寬△α隨著復(fù)墾年限逐漸增大,土壤孔隙狀況得到改善,土壤孔隙分布越趨于復(fù)雜,變異程度較高;重構(gòu)土壤及原地貌土壤孔隙三維分布多重分形譜函數(shù)△f0,呈左鉤狀,大概率孔隙占主要地位,孔隙分布不均勻。多重分形參數(shù)D1、D0-D1、△D、△α、△f間具有較好的相關(guān)性,從不同角度上反映了土壤孔隙三維分布的非均質(zhì)性。
[Abstract]:Soil porosity plays an important role in the movement of water and nutrients, and the reconstruction of soil porosity reflects the quality of reclaimed soil. Based on the Math Works Matlab 2009a platform, this study was based on the 3D reconstruction of soil pore CT images. Using the multifractal theory, the three-dimensional multifractal quantitative characterization of the reconstructed soil (23 years, 20 years, 20 years) and the original geomorphological soil was carried out at the dump of different reclamation years in Antaibao opencast coal mine, in order to explore the spatial distribution law of the reconstructed soil pore space. The results showed that the reconstructed soil pore 3D structure had multifractal characteristics, the information entropy dimension D 1, the generalized dimension spectrum curve bending degree D, the multifractal spectrum width 偽 gradually increased with the reclamation years, the soil pore condition was improved. The distribution of soil pores tends to be more complex and the degree of variation is higher. The three-dimensional multifractal spectrum function f _ 0 of reconstructing soil and original geomorphologic soil pore is left hook shape and large probability pore occupies the main position and the pore distribution is not uniform. The multifractal parameters D _ (1) D _ (0) D _ (1), D _ (0) D _ (1), D _ (偽) and (f) had good correlation, which reflected the heterogeneity of soil pore distribution from different angles.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)土地科學(xué)技術(shù)學(xué)院;國(guó)土資源部土地整治重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41271528) 山西省自然科學(xué)基金項(xiàng)目(2014011034-1)資助
【分類號(hào)】：S152.5

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本文編號(hào)：1782286