海州露天煤矿排土场复垦区不同土地利用类型土壤入渗特征

发布时间：2019-03-01 12:23

【摘要】：为揭示排土场复垦区不同土地利用类型土壤的水源涵养功能,采用野外实地双环入渗试验和室内理化分析方法,系统地研究了海州露天煤矿排土场复垦区不同土地利用类型(乔木林地、灌木林地、农用地、荒草地)土壤入渗特性及其影响因素。结果表明:不同土地利用类型下的土壤初始入渗率、稳定入渗率和累计入渗量均表现为乔木林地灌木林地农用地荒草地;不同土地利用类型下土壤入渗过程的拟合优度存在差异,G-P综合模型、Kastiakov模型、Horton模型的平均拟合优度依次为0.926,0.908,0.905。G-P综合模型相对误差为79.21%~123.69%,更接近排土场复垦区土壤入渗的实际过程,可作为排土场复垦区土壤入渗过程的预测模型;不同土地利用类型下土壤初始入渗率与非毛管孔隙度呈显著正相关,稳定入渗率和累计入渗量与非毛管孔隙度、砾石含量和部分根系特征呈显著正相关;采用主成分分析评价的土壤入渗能力排序为乔木林地灌木林地农用地荒草地,初始入渗率、稳定入渗率、14min入渗率和累积入渗量的主成分方差累积贡献率为99.047%,较好地表达了土壤入渗能力。
[Abstract]:In order to reveal the water conservation function of the soils of different land use types in the reclamation area, the field double-loop infiltration test and indoor physical and chemical analysis method were used. Soil infiltration characteristics and influencing factors of different land use types (Arbor forest, shrub forest, agricultural land, wasteland) in reclamation area of Haizhou opencast coal mine dump were systematically studied in this paper. The results showed that the initial infiltration rate, stable infiltration rate and cumulative infiltration amount of soil under different land use types were as follows: Arbor woodland, shrub forest land, agricultural land wasteland; The goodness of fit of soil infiltration process was different under different land use types. Gp comprehensive model and Kastiakov model were used to analyze the relationship between soil infiltration and soil infiltration. The average goodness-of-fit of Horton model was 0.926, 0.908, and the relative error of 0.905. The integrated model was 79.21% and 123.69% respectively, which was closer to the actual process of soil infiltration in the reclamation area of the waste yard, and the relative error of the integrated model was 79.21% and 123.69%, respectively. It can be used as the prediction model of soil infiltration process in the reclamation area of waste yard. Soil initial infiltration rate was positively correlated with non-capillary porosity under different land use types, while stable infiltration rate and cumulative infiltration rate were positively correlated with non-capillary porosity, gravel content and part of root system characteristics. The order of soil infiltration capacity evaluated by principal component analysis was as follows: Arbor woodland, shrub land, farmland wasteland, initial infiltration rate, stable infiltration rate, 14min infiltration rate and cumulative infiltration rate, the cumulative contribution rate of principal component variance was 99.047%. The soil infiltration ability was well expressed.
【作者单位】：辽宁工程技术大学环境科学与工程学院;
【基金】：国家自然科学基金项目(51474119)
【分类号】：S152.7;S714

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