Effect of the Wetting Hydraulic Property of Soil on 1-D Water Infiltration

Xuebo Li, Tianlun Shen, Ke Xiang, Qian Zhai (), Harianto Rahardjo, Alfrendo Satyanaga and Shijun Wang
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Xuebo Li: School of Civil Engineering, Tianjin University, Tianjin 300072, China
Tianlun Shen: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, China
Ke Xiang: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, China
Qian Zhai: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, China
Harianto Rahardjo: School of Civil and Environmental Engineering, Nanyang Technological University, Block N1, Nanyang Ave., Singapore 639798, Singapore
Alfrendo Satyanaga: Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave., 53, Nur-Sultan 010000, Kazakhstan
Shijun Wang: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, China

Sustainability, 2023, vol. 15, issue 3, 1-7

Abstract: Rainwater infiltration is primarily governed by the soil-water characteristic curve (SWCC) and hydraulic conductivity function (HCF) of soil. Both the SWCC and the HCF are hysteretic during the drying and wetting processes. In a numerical simulation, different seepage results can be obtained by incorporating different hydraulic conductivity functions of soil. In practice, the wetting HCF is commonly estimated from the wetting SWCC using the statistical method, which is named HCF swcc,w in this note. However, there is no study that has verified the results from seepage analyses using HCF swcc,w . Therefore, the objective of this study is to investigate the influence of wetting SWCC and wetting HCF on 1-D water infiltration. The results from the numerical simulations were verified with the instrumentation reading from a soil column. It was observed that the results from the model using wetting HCF PSDF , which defines the wetting HCF estimated using the concept of pore-size distribution function, gave better agreement with the instrumented data. Therefore, both wetting SWCC and wetting HCF PSDF are advised to be used as input information for the numerical simulation of rainwater infiltration.

Keywords: simulation of rainwater infiltration; wetting SWCC for infiltration analysis; wetting HCF for infiltration analysis; hysteresis of SWCC; infiltration to soil column (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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