DOI: 10.5194/tc-15-2133-2021
论文题名: Soil infiltration characteristics and pore distribution under freezing-thawing conditions
作者: Jiang R. ; Li T. ; Liu D. ; Fu Q. ; Hou R. ; Li Q. ; Cui S. ; Li M.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 4 起始页码: 2133
结束页码: 2146
语种: 英语
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164716
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Jiang R.,Li T.,Liu D.,et al. Soil infiltration characteristics and pore distribution under freezing-thawing conditions[J]. Cryosphere,2021-01-01,15(4)