土壤水分
抽吸
土壤质地
电阻率和电导率
土壤科学
纹理(宇宙学)
堆积密度
含水量
Pedotransfer函数
环境科学
水文学(农业)
岩土工程
导水率
地质学
热力学
物理
图像(数学)
人工智能
量子力学
计算机科学
作者
Lin Liu,Yili Lu,Yongwei Fu,Robert Horton,Tusheng Ren
出处
期刊:Geoderma
[Elsevier]
日期:2022-03-01
卷期号:409: 115630-115630
被引量:11
标识
DOI:10.1016/j.geoderma.2021.115630
摘要
Information on soil water suction (h) is essential to study water flow and solute transport in soils, and to understand engineering behaviors of unsaturated soils. Due to limited availability of field methods that can accurately measure h, numerous studies have been performed to estimate h from more readily available soil properties. In this study, a new relationship between h and soil electrical resistivity (ρ), developed from the Gardner water retention model and Archie's second law, was used to estimate h values lower than the air entry value and a formation factor (expressed on log-scale) less than 1. The two model parameters (A and B), which are functions of soil texture and bulk density, were obtained by fitting the model to ρ and h data measured on soil columns of eight textures and various bulk densities. Laboratory and field evaluations with independent h and ρ data showed that the model estimated h values agreed well with the measured values, with root mean square errors less than 0.85 kPa. The model provides a new opportunity to evaluate in situ h dynamics and study coupled transport of water and solutes in the field.
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