| 非饱和含盐土壤水扩散系数试验研究 |
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| 引用本文： | 邓友生,何平,周成林,李宜池,房建宏,黄世静.非饱和含盐土壤水扩散系数试验研究[J].冰川冻土,2006,28(6):818-822. |
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| 作者姓名： | 邓友生 何平 周成林 李宜池 房建宏 黄世静 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,冻土工程国家重点实验室,甘肃,兰州,730000;青海省,公路科研勘测设计院,青海,西宁,810008 |
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| 基金项目： | 国家自然科学基金
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中国科学院基金
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中国科学院知识创新工程项目 |
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| 摘 要： | 在室内用水平土柱吸渗法对不同含盐量、不同溶液浓度和不同土类的土壤水扩散系数进行了试验研究.试验结果表明:土壤水(或盐水)扩散系数与土壤的体积含水量之间具有指数函数的关系,且随着含水量的降低而减小.当同一类土在干容重和含水量相同时,土壤水扩散系数是随土中含盐量的增多而增大,以粗粒土最为明显.不同浓度的盐水在土壤中运行时,其盐水的扩散系数是随盐水浓度的增大而减小.
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| 关 键 词： | 含盐量 含水量 干容重 扩散系数 |
| 文章编号： | 1000-0240(2006)06-0818-05 |
| 收稿时间： | 03 27 2006 12:00AM |
| 修稿时间： | 08 29 2006 12:00AM |
Experimental Study of the Hydraulic Diffusivity of Unsaturated Saline Soil |
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| DENG You-sheng,HE Ping,ZHOU Cheng-lin,LI Yi-chi,FANG Jian-hong,HUANG Shi-jing.Experimental Study of the Hydraulic Diffusivity of Unsaturated Saline Soil[J].Journal of Glaciology and Geocryology,2006,28(6):818-822. |
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| Authors: | DENG You-sheng HE Ping ZHOU Cheng-lin LI Yi-chi FANG Jian-hong HUANG Shi-jing |
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| Institution: | 1. State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China; 2. Qinghai Provincial Research Institute of Highway Investigation and Design, Xining Qinghai 810008, China |
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| Abstract: | Hydraulic diffusivities of unsaturated soil with the different salt contents,saline concentrations and dry densities were experimental studied by means of wet front advancing in a horizontal soil column.It is found that: 1) The hydraulic diffusivity of soil water or saline is an exponential function of water content,and decreases with decreasing water content;2) For the same type of soil when dry density and water content are the same,the hydraulic diffusivity of soil water increases with salt content,especially,for the coarse-grained soil;3) When saline migrates in the soil,the hydraulic diffusivity of saline decreases with saline concentration. |
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| Keywords: | salt content water content dry density hydraulic diffusivity |
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