陕北柠条塔煤矿沉陷区边缘坡面土壤含水率垂向变化特征
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摘要
文章以陕北柠条塔煤矿沉陷区边缘坡面土壤为研究对象,通过野外采样、室内实验等方法,研究并揭示土壤含水量在垂向上的变化特征。研究结果表明:第一,沉陷区边缘坡面土壤含水率介于10%～12%,垂向上分布均匀;第二,沉陷区边缘坡面土壤在各个深度的含水率均明显高于非沉陷区土壤,平均提高了1.53倍,表明沉陷使得边缘坡面土壤的下渗和持水能力有所提升,这与土壤孔隙度增加有关;第三,边缘坡面土壤含水率增加可能是陕北沉陷区形成之初的短期正向生态效应,可为沉陷区短期生态环境修复提供依据。
In this paper, the vertical variation characteristics of soil water content were studied and revealed by means of field sampling and laboratory experiments, taking the marginal slope soil in the subsidence area of Ningtiaota Coal Mine in northern Shaanxi as the research subject. The results show that: First, the soil moisture content on the slope at the edge of the subsidence area is between 10% and 12%, and the vertical distribution is uniform; secondly, the moisture content of the slope soil in the subsidence area was significantly higher than that in the non-subsidence area, and the average water content of the slope soil in the subsidence area was 1.53 times higher than that in the non-subsidence area. This result shows that the infiltration and water holding capacity of the marginal slope soil are improved, which is related to the increase of soil porosity. Thirdly, the increase of soil moisture content on the marginal slope may be a short-term positive ecological effect at the beginning of the formation of the subsidence area in northern Shaanxi. It can provide the basis for short-term ecological environment restoration in subsidence area.
In this paper, the vertical variation characteristics of soil water content were studied and revealed by means of field sampling and laboratory experiments, taking the marginal slope soil in the subsidence area of Ningtiaota Coal Mine in northern Shaanxi as the research subject. The results show that: First, the soil moisture content on the slope at the edge of the subsidence area is between 10% and 12%, and the vertical distribution is uniform; secondly, the moisture content of the slope soil in the subsidence area was significantly higher than that in the non-subsidence area, and the average water content of the slope soil in the subsidence area was 1.53 times higher than that in the non-subsidence area. This result shows that the infiltration and water holding capacity of the marginal slope soil are improved, which is related to the increase of soil porosity. Thirdly, the increase of soil moisture content on the marginal slope may be a short-term positive ecological effect at the beginning of the formation of the subsidence area in northern Shaanxi. It can provide the basis for short-term ecological environment restoration in subsidence area.
引文
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[4]崔向新,高永,刘彩云.采煤塌陷对风沙土含水量的影响[J].浙江林学院学报,2008,25(4):491-496.