Effect of super absorbent polymer on vertical infiltration characteristics of soil water

Bai Wenbo; Song Jiqing; Li Maosong; Wang Yafeng; Wu Yongfeng; Liu Buchun; Wang Chunyan; Wang Xiufen

Volume 25 Issue 2

Feb. 2009

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Abstract

Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2009 > 25(2): 18-23.

Bai Wenbo, Song Jiqing, Li Maosong, Wang Yafeng, Wu Yongfeng, Liu Buchun, Wang Chunyan, Wang Xiufen. Effect of super absorbent polymer on vertical infiltration characteristics of soil water[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2009, 25(2): 18-23.

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Effect of super absorbent polymer on vertical infiltration characteristics of soil water

Bai Wenbo^1,2,3,
Song Jiqing^1,2,3,
Li Maosong^1,2,3,
Wang Yafeng⁴,
Wu Yongfeng^1,2,3,
Liu Buchun^1,2,3,
Wang Chunyan^1,2,3,
Wang Xiufen^1,2,3

1.
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2.
Key Laboratory of Agro-Environment and Climate Change, Ministry of Agriculture, Beijing 100081, China
3.
Key Laboratory of Dryland Farming and Water-Saving Agriculture, Ministry of Agriculture, Beijing 100081, China
4.
Research Center for Eco-environmental Sciences, Chinese Academy Sciences, Beijing 100085, China

More Information

Received Date: February 26, 2008
Revised Date: February 11, 2009
Published Date: February 27, 2009

Graphical Abstract

Abstract

Abstract

In order to determine the effects of super absorbent polymer on characteristics and dynamic changes of soil water infiltration, the dynamic changes of infiltration rates, cumulative infiltration, and wetting front of soil water under super absorbent polymer were analyzed through the lab experiments. The results showed that the influences of super absorbent polymer on infiltration rate were stable and consistent. Mixed (0-10 cm) and layered (5 cm) application of super absorbent polymer in upper soil layer would restrict soil water downward movement. After 30 minutes, the cumulative infiltration significantly decreased by 17.3%-6.6% and 5.5%-46.6% compared with the control. The restraining effect was increased with the increasing concentration of super absorbent polymer, and it was more obvious in layered application, especially in the concentration of 0.1%. Whereas, mixed (10-20 cm) and layered (10 cm and 15 cm) application of super absorbent polymer in lower soil layer had limited inhibitory effect, it reduced by 4.9%-11.9% compared with the control. While in layered application (10 cm and 15 cm) with the concentration of 0.1%, infiltration capacity of soil water would be enhanced, and the relevant cumulative infiltrations were about 1.1 times larger than the control. The water content in the soil layer with super absorbent polymer and the corresponding under soil layer would increase 1.1-1.9 times through layered application.
- ponding infiltration,
- infiltration rate,
- soil water content,
- super absorbent polymer,
- wetting front

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