文献类型：期刊文献

英文题名：Experimental Study of Rainfall Infiltration in an Analog Fracture-matrix System

作者：Zhong, Zhen[1,2];Gao, Huicai[1];Hu, Yunjin[1,2]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Ctr Rock Mech & Geohazards, Shaoxing 312000, Peoples R China

年份：2021

卷号：2021

外文期刊名：ADVANCES IN MATERIALS SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000668978400004)、、EI(收录号：20212310447348)、Scopus(收录号：2-s2.0-85106968597)、WOS

基金：The authors thank Junjun Zhang from Zhejiang University for the technical assistance in the designing of the experimental system. This research was financially supported by National Natural Science Foundation of China (Grant nos. 51509154, 41977256, and 41907167), Natural Science Foundation of Zhejiang Province (Grant no. LGJ20E090001), and International Scientific and Technological Cooperation Projects of Shaoxing University (Grant no. 2019LGGH1008).

语种：英文

外文关键词：Flow of fluids - Infiltration - Rain

外文摘要：In this study, an experimental apparatus was developed to investigate unsaturated infiltration in an analog fracture-matrix system. Fracture and adjacent matrix is simulated by sands with various particle sizes. Four rainfall infiltration experiments were performed on the analog fracture-matrix system at a constant rainfall rate of 100 mm/h. The process of rainfall infiltration is measured by a combination method of tensiometers and quick moisture apparatus. The measured results reveal that fracture-matrix interactions certainly exert influences on the hydraulic behaviour of unsaturated fractured matrix, and the fluid flow mainly infiltrates along the nonuniform paths within the matrix. Moreover, it is observed that the influences are greater when using a coarser sand to mimic the fracture. Specifically, the wetting phase in the matrix moves faster than that in the fracture; the fracture, therefore, acts as a vertical capillary barrier, but there exists lateral water exchange from the matrix to the fracture. Overall, this study has demonstrated the importance of fracture/matrix interactions, which should be considered when dealing with unsaturated flow through permeable matrices.