Diurnal Variation Characteristics of Temperature and Water Content in Quicksand Surface Layer Under Different Protective Measures

Fan Yanwei; Shi Jinhong; Tang Xingpeng

doi:10.13961/j.cnki.stbctb.2023.06.010

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Diurnal Variation Characteristics of Temperature and Water Content in Quicksand Surface Layer Under Different Protective Measures

- Diurnal Variation Characteristics of Temperature and Water Content in Quicksand Surface Layer Under Different Protective Measures
- Bulletin of Soiland Water Conservation Vol. 43, Issue 6, Pages: 72-80(2023)
- 作者机构：
  
  兰州理工大学能源与动力工程学院,甘肃,兰州,730050
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.06.010
  CLC： S728.4
- Published：2023
- 稿件说明：
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Fan Yanwei, Shi Jinhong, Tang Xingpeng. Diurnal Variation Characteristics of Temperature and Water Content in Quicksand Surface Layer Under Different Protective Measures[J]. Bulletin of Soiland Water Conservation, 2023, 43(6): 72-80.
DOI：

Fan Yanwei, Shi Jinhong, Tang Xingpeng. Diurnal Variation Characteristics of Temperature and Water Content in Quicksand Surface Layer Under Different Protective Measures[J]. Bulletin of Soiland Water Conservation, 2023, 43(6): 72-80. DOI： 10.13961/j.cnki.stbctb.2023.06.010.

摘要

[目的

]

探讨不同防护措施下流沙地表层温湿度变化规律及其影响机理，为沙漠区植被恢复提供理论依据。[方法

]

采用野外大田试验，设置5种防护措施（单管防护、管裹反光膜、管壁开孔、管内覆秸秆和双管防护），3种管件直径（75，90，110 mm）和3种露地高度（10，15，20 cm），以无防护流沙地表为对照，依托土壤温湿度记录仪对地表层温湿度日变化特征进行研究。[结果

]

5种防护措施均能起到降温作用，其中双管防护降温效果最好；同一防护措施下，06：00时刻管内地表层温度随管件直径的增大而增大，其他时段则随管件直径的增大而降低，而全天时段管内地表层温度随露地高度的增大而降低；管内地表层温度随流沙地表层温度的增大而增大，两者具有良好的线性关系（R

≥0.830）；与无灌溉相比，灌溉在白天时段（06：00—21：00）起降温作用，而夜间时段（21：00—06：00）起保温作用；管内地表层水热存在耦合效应，地表层含水率越高，其温度越低。[结论

]

双管防护+灌溉措施最有利于流沙地表层控温保水，其中最佳管件参数是管件直径110 mm和露地高度20 cm。

Abstract

[Objective] The variation of temperature and water content in a quicksand surface layer under different protective measures and their influencing mechanisms were investigated in order to provide a theoretical basis for vegetation restoration in a desert area. [Methods] Field tests were carried out to examine five protective measures (single pipe protection

pipe coated with reflective film

pipe wall opening

pipe covered with straw

and double-pipe protection)

three pipe diameters (75

110 mm)

and three open field heights (10

20 cm). The unprotected quicksand surface was used as the control. The diurnal variation characteristics of surface soil temperature and water content were measured using a soil temperature and water content recorder in the quicksand surface layer. [Results] The five protective measures contributed significantly to the cooling effect

with double-tube protection showing the best cooling effect. Under the same protective measures

the surface layer temperature of the pipe interior increased with increasing pipe diameter at 06:00 am

and decreased with increasing pipe diameter at other times. The surface layer temperature of the pipe interior decreased with increasing open ground height during the entire day. The surface layer temperature of the inner tube increased with the surface layer temperature of the quicksand surface layer. Additionally

there was a strong linear relationship between the surface layer temperatures of the inner tube and the quicksand (R2 ≥ 0.830). Irrigation cooled the surface layer during the daytime (06:00-21:00) and preserved heat during the nighttime (21:00-06:00). Furthermore

there existed a coupling effect between the surface layer water content and the temperature inside the pipe. This result signified that the higher the surface layer water content

the lower the temperature. [Conclusion] Double-pipe protection and irrigation were found to be the most beneficial to temperature control and water conservation in the surface layer of quicksand. The optimum pipe parameters were a pipe diameter of 110 mm and an open field height of 20 cm.

关键词

Keywords

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