气候变化领域集成服务门户(CCPortal): Soil infiltration characteristics and pore distribution under freezing-thawing conditions

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DOI	10.5194/tc-15-2133-2021
	Soil infiltration characteristics and pore distribution under freezing-thawing conditions
	Jiang R.; Li T.; Liu D.; Fu Q.; Hou R.; Li Q.; Cui S.; Li M.
发表日期	2021
ISSN	19940416
起始页码	2133
结束页码	2146
卷号	15 期号:4
英文摘要	Frozen soil infiltration widely occurs in hydrological processes such as seasonal soil freezing and thawing, snowmelt infiltration, and runoff. Accurate measurement and simulation of parameters related to frozen soil infiltration processes are highly important for agricultural water management, environmental issues, and engineering problems in cold regions. Temperature changes cause soil pore size distribution variations and consequently dynamic infiltration capacity changes during different freeze-thaw periods. To better understand these complex processes and to reveal the freeze-thaw action effects on soil pore distribution and infiltration capacity, black soils, meadow soils, and chernozem were selected as test subjects. These soil types account for the largest arable land area in Heilongjiang Province, China. Laboratory tests of soils at different temperatures were conducted using a tension infiltrometer and ethylene glycol aqueous solution. The stable infiltration rate and hydraulic conductivity were measured, and the soil pore distribution was calculated. The results indicated that for the different soil types, macropores, which constituted approximately 0.1 % to 0.2 % of the soil volume under unfrozen conditions, contributed approximately 50 % of the saturated flow, and after soil freezing, the soil macropore proportion decreased to 0.05 % to 0.1 %, while the saturated flow proportion decreased to approximately 30 %. Soil moisture froze into ice crystals inside relatively large pores, resulting in numerous smaller-sized pores, which reduced the number of macropores but increased the number of smaller-sized mesopores, so that the frozen soil infiltration capacity was no longer solely dependent on the macropores. After the ice crystals had melted, more pores were formed within the soil, enhancing the soil permeability./p. © 2021 EDP Sciences. All rights reserved.
英文关键词	arable land; freeze-thaw cycle; frozen ground; hydraulic conductivity; ice crystal; infiltration; pore space; size distribution; snowmelt; soil moisture; soil type; China; Heilongjiang
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202338
作者单位	School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Heilongjiang Prov. Key Lab. of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
推荐引用方式 GB/T 7714	Jiang R.,Li T.,Liu D.,et al. Soil infiltration characteristics and pore distribution under freezing-thawing conditions[J],2021,15(4).
APA	Jiang R..,Li T..,Liu D..,Fu Q..,Hou R..,...&Li M..(2021).Soil infiltration characteristics and pore distribution under freezing-thawing conditions.Cryosphere,15(4).
MLA	Jiang R.,et al."Soil infiltration characteristics and pore distribution under freezing-thawing conditions".Cryosphere 15.4(2021).