干旱区生态环境知识资源中心(Arid): Effects of salt content on desiccation cracks in the clay

Arid

DOI	10.1007/s12665-021-09987-8
	Effects of salt content on desiccation cracks in the clay
	Li, Dongdong; Yang, Binbin; Yang, Changde; Zhang, Zepeng; Hu, Mingming
通讯作者	Yang, BB (corresponding author), Xuchang Univ, Sch Civil Engn, 88 Bayi Rd, Xuchang 461000, Henan, Peoples R China.
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2021
卷号	80 期号:19
英文摘要	On the whole, if the climate of the saline soil distribution area is arid or semi-arid, with small precipitation and large evaporation. Thus, soil desiccation cracks are a common phenomenon in saline soil. The cracks of soils cause serious problems in several fields (e.g., agriculture, geotechnical engineering, and engineering geology). The type and amount of salt in saline soil have important effects on its mechanical and hydraulic characteristics and cracking behavior. The purpose of this study is to quantitatively analyze the effects of salt content on the characteristics of crack development and water evaporation in clay. Laboratory experiments were carried out on six groups of samples with thin layers of saturated clay slurry with NaCl content of 0, 1%, 2%, 4%, 8%, and 16% by weight of dry soil under controlled temperature and humidity. During the drying process, the mass of the samples was recorded using an electronic balance, and photographs were taken with a digital camera to record the development of surface cracks. The geometric parameters of the crack images, such as the crack ratio and the total length of the crack network, were determined using digital image processing technology. Combined with the fractal theory, the development process of cracking was analyzed quantitatively. The results showed that water evaporation and crack development were both reduced with increases in NaCl content. The evaporation process of water could be divided into three stages: the steady, falling, and residual rate stages. With increases in NaCl content, the crack ratio, total length of the crack network, average crack width, and fractal dimension of the crack all decreased. When the NaCl content was equal to 16%, the surface of the soil was covered by a layer of salt due to salt crystallization, and no cracks appeared on the surface to the end of the evaporation process. The study results would contribute to hydrological analyses in arid and semi-arid lands with potential applications in water and land resources management.
英文关键词	Desiccation cracks in soils Fractal analysis of cracks Salt content Image processing of surface cracks
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701283800001
WOS关键词	TEMPERATURE-DEPENDENCE ; SOIL ; SHRINKAGE ; BEHAVIOR ; SALINITY ; COMPRESSIBILITY ; DYNAMICS ; SUCTION ; LAYER ; NACL
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363112
作者单位	[Li, Dongdong] Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Shanxi, Peoples R China; [Li, Dongdong; Yang, Binbin; Zhang, Zepeng; Hu, Mingming] Xuchang Univ, Sch Civil Engn, 88 Bayi Rd, Xuchang 461000, Henan, Peoples R China; [Yang, Changde] Xinjiang Inst Engn, Sch Min Engn & Geol, Urumqi 830023, Xinjiang Uygur, Peoples R China
推荐引用方式 GB/T 7714	Li, Dongdong,Yang, Binbin,Yang, Changde,et al. Effects of salt content on desiccation cracks in the clay[J],2021,80(19).
APA	Li, Dongdong,Yang, Binbin,Yang, Changde,Zhang, Zepeng,&Hu, Mingming.(2021).Effects of salt content on desiccation cracks in the clay.ENVIRONMENTAL EARTH SCIENCES,80(19).
MLA	Li, Dongdong,et al."Effects of salt content on desiccation cracks in the clay".ENVIRONMENTAL EARTH SCIENCES 80.19(2021).