Characteristics and calculation model of phreatic evaporation of sand-layered soil

Shi Wenjuan; Shen Bing; Wang Zhirong; Wang Wenyan

Volume 23 Issue 2

Feb. 2007

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2007 > 23(2): 17-20.

Shi Wenjuan, Shen Bing, Wang Zhirong, Wang Wenyan. Characteristics and calculation model of phreatic evaporation of sand-layered soil[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2007, 23(2): 17-20.

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Characteristics and calculation model of phreatic evaporation of sand-layered soil

Key Laboratory for Northwest Water Resources and Ecological Environment of Ministry of Education, Xi'an University of Technology, Xi'an 710048, China

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Received Date: January 24, 2006
Revised Date: July 24, 2006
Published Date: February 27, 2007

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Abstract

Abstract

Phreatic evaporation characteristic of sand-layered soil with a shallow water table was analyzed according to laboratory experiments. Results show that the sand layer has positive and negative effect on the water evaporation. At the same soil layer, the phreatic evaporation decreases with the increase of sand positions and the decrease of sand particle sizes. Taking relative sand position and sand particle size as quantitative indices, correct model of steady phreatic evaporation with different sand positions and sand particle sizes was established. Parameters test of steady phreatic evaporation model was analyzed. The research supplies a new method for quantitative study of steady phreatic evaporation of sand-layer soil.
- sand-layered soil,
- evaporation intensity,
- calculation model,
- influence coefficient

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