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首页> 外文期刊>Soil and Water Research >Effects of rock fragments on the water infiltration and hydraulic conductivity in the soils of the desert steppes of Inner Mongolia, China
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Effects of rock fragments on the water infiltration and hydraulic conductivity in the soils of the desert steppes of Inner Mongolia, China

机译：岩石碎片对中国内蒙古沙漠草原水渗透和水力电导率的影响

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Soils that contain rock fragments (particles 2 mm in diameter) are distributed all over the world. The presence of these small rock fragments can have a great impact on soil water retention properties, as well as on the soil-water in?ltration and vegetation restoration in semi-arid regions. To quantitatively describe the transport of water in stony soils, repacked soil cores were used to determine the in?ltration rates for di?erent rock fragment contents (0%, 10%, 20%, 30%, and 40%) and rock fragment sizes (2–5, 5–8, 8–11, and 2–11 mm). The results showed that both the content and size of the rock fragments and their interaction signi?cantly a?ected the in?ltration process. The in?ltration rates over time and the saturated hydraulic conductivity ( K s ) decreased with an increasing rock fragment content to an observed minimum value for a 40% rock fragment content. The soil-water infiltration processes were accurately described by the Kostiakov model. The measured and calculated K s ?values decreased with an increasing rock fragment content, which was in accordance with the published data and in accordance with the K s ?obtained by five empirical methods. The variations in the measured K s ?were likely due to the variations in the soil properties caused by the soil sample repacking. The results of this study may improve the understanding of the e?ects of the rock fragment content and size on the in?ltration processes in arid and semi-arid desert steppes.
机译：含有岩石片段的土壤（直径颗粒＆ 2 mm）分布在世界各地。这些小岩石片段的存在可能对土壤水保留性能的影响很大，以及在半干旱地区的水溶液和植被恢复的土壤水中产生很大影响。为了定量描述石土壤中水的运输，使用重新包装的土壤核来确定DIα无需岩石片段内容物（0％，10％，20％，30％和40％）和岩石片段尺寸（2-5,5-8,8-11和2-11 mm）。结果表明，岩石碎片的内容和尺寸和它们的相互作用标志均为何种局部的曲折？射击了in？ltration过程。随着时间的推移和饱和液压导电性（ks）的载流速率随着40％岩石片段含量的观察到的最小值而降低。通过Kostiakov模型精确描述了土壤 - 水渗透过程。测量的和计算的k s？值随着岩石片段含量的增加而降低，这与已公布的数据并根据K S.通过五种经验方法获得。测量的K s的变化是可能导致由土样品重新包装引起的土壤性质的变化。该研究的结果可以改善岩石片段含量和尺寸的e≤te的理解 - 在干旱和半干旱沙漠草原中的水平过程中的岩石碎片含量和大小。

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