浅埋深黏土包气带氮迁移转化原位实验研究

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Abstract In this paper, the movement and transformation of nitrogen was investigated in clay unsaturated zone with shallow groundwater depth via in-situ experiment. Results show that, The depth to groundwater table fluctuated between 145.9cm and 173.6cm, and the calculated capillary height of groundwater reaches 297.0cm which induces high soil water content in soil profile, varied between 0.30~0.45cm³/cm³ except for near surface layer; The concentration of NH₄⁺-N and NO₃^--N was of the maximum value at 155cm depth in the soil profile, 1.43 and 23.00mg/kg, respectively, which exceeded the background values of 1.13 and 21.05mg/kg; Under the condition of nearly saturated of the clay soil, the NH₄⁺-N and NO₃^--N moved from ground surface to the depth of 155cm within one day. The research results indicated that the blocking effect of clay on the movement of nitrogen pollutants is weakened on shallow groundwater table depth.

Key words： shallowgroundwater table clayunsaturated zone nitrogen pollutant movement and transformation in-situ experiment HanzhongBasin

Received: 01 November 2021

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X523

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	Articles by authors
	PU Fang
	HUANG Jin-ting
	SONG Ge
	WANG Jia-wei
	LI Zong-ze
	TIAN Hua
	ZHANG Fang
	SUN Fang-qiang

Cite this article:

PU Fang,HUANG Jin-ting,SONG Ge等. Movement and transformation of nitrogen in clay unsaturated zone under shallow groundwater table:In-situ experiment[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2707-2713.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2707

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