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Method for increasing near-surface air temperature and shallow soil temperature in frozen soil area

A soil temperature and permafrost area technology, which is applied in the field of increasing the near-surface air temperature and shallow soil temperature in permafrost areas, can solve the problems of complex temperature increasing methods, high construction and operation costs, and large maintenance workload, and achieves the promotion of The development of green mining and circular economy, the early greening period, and the effect of appropriate temperature increase

Pending Publication Date: 2022-03-15
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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Problems solved by technology

The above-mentioned warming methods are complicated in process, high in construction and operation costs, heavy in later maintenance workload, and some even cause plastic pollution (such as mulch film or plastic greenhouses, etc.), and are not suitable for large-scale ecological restoration and food crop planting in cold regions. At present, there is no precedent for applying the above methods to the ecological restoration of vast forest areas, grassland areas, and large-scale agricultural planting

Method used

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  • Method for increasing near-surface air temperature and shallow soil temperature in frozen soil area
  • Method for increasing near-surface air temperature and shallow soil temperature in frozen soil area
  • Method for increasing near-surface air temperature and shallow soil temperature in frozen soil area

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Embodiment 1

[0032] Implementation time: July 1, 2021 to September 30, 2021.

[0033] Implementation location: on the right side of mileage 3061 of G109 National Highway in the hinterland of Hoh Xil on the Qinghai-Tibet Plateau, at 34°51′ north latitude, 92°56′ east longitude, and 4,700 meters above sea level.

[0034] Climatic conditions: the present invention is mainly aimed at cold regions such as permafrost regions with insufficient positive accumulated temperature during the growth period and difficult ecological restoration. Starting from June 3, the test site has a continuous daily average temperature above 0°C; on October 4, the daily average temperature began to drop below 0°C. During the test period from July 1 to September 30, 2021, the lowest instantaneous temperature was -4.3°C, the lowest daily average temperature was 0.41°C, the highest instantaneous temperature was 17.1°C, the highest daily average temperature was 10.1°C, and the maximum daily rainfall was 13.2mm. During t...

experiment example 1

[0046] In order to effectively increase the near-surface air temperature and shallow soil temperature, the tailings material used to cover the surface should be dark or black tailings that absorb solar radiation well and have a significant warming effect. In this embodiment, the apparent reflectance of the tailings material to solar radiation is not greater than 10%. The apparent reflectance is directly related to the solar warming effect, the smaller the apparent reflectance, the more significant the radiation warming effect. Considering that the apparent reflectance of common planting soil is generally 25 to 35%, in order to ensure the warming effect of this measure, it should be ensured that the apparent reflectance of the covering layer to solar radiation is not greater than 20% within the design life cycle.

[0047] The thinnest thickness of the tailings covering layer used in the present invention should be able to resist the influence of wind erosion and water erosion, ...

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Abstract

The invention discloses a method for increasing near-surface air temperature and shallow soil temperature in a frozen soil region, and relates to the field of cold region engineering and environment. The method comprises the following step of covering the surface of the soil in the frozen soil area with the tailings. By means of the method, the sustainable development mode of green utilization of tailing resources can be widened, temperature increasing of near-surface air and shallow soil in the frozen soil area can be achieved, and vegetation growth is promoted.

Description

technical field [0001] The invention relates to the field of engineering and environment in cold regions, in particular to a method for increasing near-surface air temperature and shallow soil temperature in permafrost regions. Background technique [0002] Cold regions generally refer to permafrost regions, including transient frozen soil regions, short-term frozen soil regions, seasonal frozen soil regions and permafrost regions ("China Frozen Soil" (Zhou Youwu et al., 2000), "Code for Engineering Geological Survey of Frozen Soils" "GB 50324-2014), even if the first three are not considered, the global permafrost area alone is close to 30 million square kilometers, and the permafrost area in my country is about 2 million square kilometers. Forests, grasslands, deserts, and tundra are distributed in the above-mentioned vast areas, but due to the cold climate in this area, the annual average temperature is generally below 0°C, the annual positive accumulated temperature is lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01G13/06
CPCA01B79/02A01G13/06
Inventor 陈继
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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