1. 中国地质大学(武汉)环境学院
2. 中国地质调查局天津地质调查中心(华北地质科技创新中心)
纸质出版:2025
移动端阅览
金玉, 陈文岭, 王铭森, 等. 基于露点水势仪与滤纸法的盐渍土蒸发过程中吸力动态规律[J]. 地质科技通报, 2025,44(6):270-280.
金玉, 陈文岭, 王铭森, et al. 基于露点水势仪与滤纸法的盐渍土蒸发过程中吸力动态规律[J]. Bulletin of Geological Science and Technology, 2025, 44(6): 270-280.
金玉, 陈文岭, 王铭森, 等. 基于露点水势仪与滤纸法的盐渍土蒸发过程中吸力动态规律[J]. 地质科技通报, 2025,44(6):270-280. DOI: 10.19509/j.cnki.dzkq.tb20240065.
金玉, 陈文岭, 王铭森, et al. 基于露点水势仪与滤纸法的盐渍土蒸发过程中吸力动态规律[J]. Bulletin of Geological Science and Technology, 2025, 44(6): 270-280. DOI: 10.19509/j.cnki.dzkq.tb20240065.
为获取盐渍土蒸发过程中总吸力、基质吸力及渗透吸力的大小,阐明不同水盐条件下各吸力动态变化特征及其对蒸发的影响,将冷镜露点水势仪(WP4C)和并行接触式滤纸法相结合,对不同含盐量土壤蒸发过程中总吸力、基质吸力与渗透吸力的动态过程及其对土壤蒸发的影响进行了分析;选取4种常用土壤水分特征曲线模型,利用SWRC-Fit对基质吸力与含水量之间的关系进行了拟合。结果表明:盐渍土在蒸发过程中基质吸力与渗透吸力占总吸力的比例不断发生变化,相同含水率下渗透吸力占比始终大于基质吸力;含水率与盐分均会影响土壤渗透吸力的大小,其中盐分的影响更显著。土壤蒸发.强度及持续时间均会受到土壤盐分影响。通过WP4C与并行接触式滤纸法可以同时获取蒸发过程中非饱和土壤的总吸力、基质吸力与渗透吸力,Fredlund and Xing(FX)模型能够较好地拟合实验蒸发过程中的实测数据,在蒸发各阶段均有较好拟合精度,也进一步证明了实验方法与数据的可靠性。
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