Characteristics of air temperature and water-salt transfer during freezing and thawing period

Ruiping Li, Haibin Shi, Takeo Akae, Yiqiang Zhang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Freezing and thawing action is a particular mechanism of soil salinization in the northwestern arid and cold area. Taking Inner Mongolia Hetao Irrigation District as an example, based on the observed field data, the variation laws of soil temperature, soil moisture and soil salt during freezing and thawing period were analyzed. Results show that the variation laws of soil temperature at the different soil layers are consistent. Variation of soil temperature lags to air temperature. With the soil depth increasing, lag interval increases also. Decrease of air temperature results in that of soil temperature, which leads to water and salt transfer. Temporal variability coefficient of salt(0.30~0.85) is larger than that of water(0.02~0.40). Salt transfer mechanism is more complex than water transfer mechanism. Research provides the foundation for the water-heat-salt coupling simulation on freezing-thawing soils and the establishment of autumn irrigation schedule in Hetao Irrigation District.

Original languageEnglish
Pages (from-to)70-74
Number of pages5
JournalNongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Volume23
Issue number4
Publication statusPublished - Apr 1 2007

Keywords

  • Autumn irrigation
  • Coupling transfer
  • Freezing and thawing soils
  • Hetao Irrigation District
  • Water-salt

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Mechanical Engineering

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