中文概要
目的:研究灌木对干燥和湿润过程中三层土质覆盖系统的吸力分布的影响。
创新点:发现对于三层土质覆盖系统,干燥过程中植物蒸腾作用不仅提高了土的吸力,同时也增加了土层之间的吸力梯度(图3)。
方法: 通过土柱试验模拟干燥和湿润过程,并测量吸力的变化。
结论:1. 植物蒸腾作用导致植有灌木的土在干燥过程中所产生的吸力较没有植物的土高60%~200%。2. 植物蒸腾作用提高了植有灌木的土的持水能力;在湿润过程中水分穿透植有灌木的土所需时间比没有植物的土长50%(图3~4)。
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Project supported by the National Natural Science Foundation of China (Nos. 51778166, 51578196, and 51608152) and the Environment and Conservation Fund Project (No. 85/2018), Hong Kong, China
Contributors
Sandar LIN, Jie XU, Charles W.W. NG, and Rui CHEN analyzed the data and wrote the first draft of the manuscript. Charles W.W. NG acquired research funding, supervised the research project, and validated the research output. Sandar LIN, Rui CHEN, Jian LIU, Zhong-kui CHEN performed the experiments and data collection. Chung Fai CHIU revised and edited the final manuscript.
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Sandar LIN, Charles W.W. NG, Jie XU, Rui CHEN, Jian LIU, Zhong-kui CHEN, and Chung Fai CHIU declare that they have no conflict of interest.
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Lin, S., Ng, C.W., Xu, J. et al. Effects of shrub on one-dimensional suction distribution and water infiltration in a three-layer landfill cover system. J. Zhejiang Univ. Sci. A 20, 546–552 (2019). https://doi.org/10.1631/jzus.A1800145
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DOI: https://doi.org/10.1631/jzus.A1800145