四川地区天然气开采对土壤渗透性的影响

发布时间：2018-08-03 19:50

【摘要】：土壤的渗透性是评价土壤涵养水源功能的重要指标之一,为明确天然气开采不同工程类型扰动后对土壤层的不同年限水文生态效应及其水源涵养功能的影响,以天然气开采为例,分析其建设活动对3类地貌类型、4种工程类型、4段年限内的研究区样地土壤渗透系数的影响情况。采用相关性分析及回归分析方法,分析天然气开采对土壤渗透系数的影响。结果表明:1)天然气开采对土壤渗透系数有一定的影响,但是这种影响随着建成年限的增长而逐渐减弱,到第5年基本得以恢复;2)通过对不同地貌、不同工程类型的土壤渗透系数随年限变化情况进行拟合,表明采用3次多项式拟合效果最好,R2均大于0.95,与实测数据有极显著的相关性,可用来预测渗透系数未来的变化趋势;3)渗透系数与土壤的化学性质相关性方面全氮最为显著,与土壤的重金属含量相关性方面铅最为显著。
[Abstract]:Soil permeability is one of the important indexes to evaluate the function of soil water conservation. Taking natural gas exploitation as an example, the influence of construction activities on soil permeability coefficient of three geomorphological types and four engineering types in the study area is analyzed. Correlation analysis and regression analysis were used to analyze the influence of natural gas exploitation on soil permeability coefficient. The results show that natural gas exploitation has a certain influence on the soil permeability coefficient, but this effect is gradually weakened with the increase of the completion years, and by the fifth year, it can be basically restored to different landforms. The soil permeability coefficient of different engineering types was fitted with different years. The results showed that the best fitting effect of cubic polynomial was greater than 0.95. there was a very significant correlation between soil permeability coefficient and measured data. It can be used to predict the change trend of permeability coefficient in the future. (3) the correlation between permeability coefficient and chemical properties of soil is the most significant, and the correlation between total nitrogen and heavy metal content of soil is the most significant.
【作者单位】：北京林业大学水土保持学院;西南油气田公司;
【基金】：中国石油西南油气田分公司科学研究与技术开发项目“川渝地区天然气开采水土保持功能影响研究”(201403011-01)
【分类号】：S152.72

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