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Water 2017, 9(4), 290; doi:10.3390/w9040290

Modeling Coupled Water and Heat Transport in the Root Zone of Winter Wheat under Non-Isothermal Conditions

1
College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2
Jinzhong University, Jinzhong 030619, China
*
Author to whom correspondence should be addressed.
Academic Editor: M. Levent Kavvas
Received: 27 December 2016 / Revised: 28 March 2017 / Accepted: 18 April 2017 / Published: 21 April 2017
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Abstract

Temperature is an integral part of soil quality in terms of moisture content; coupling between water and heat can render a soil fertile, and plays a role in water conservation. Although it is widely recognized that both water and heat transport are fundamental factors in the quantification of soil mass and energy balance, their computation is still limited in most models or practical applications in the root zone under non-isothermal conditions. This research was conducted to: (a) implement a fully coupled mathematical model that contains the full coupled process of soil water and heat transport with plants focused on the influence of temperature gradient on soil water redistribution and on the influence of change in soil water movement on soil heat flux transport; (b) verify the mathematical model with detailed field monitoring data; and (c) analyze the accuracy of the model. Results show the high accuracy of the model in predicting the actual changes in soil water content and temperature as a function of time and soil depth. Moreover, the model can accurately reflect changes in soil moisture and heat transfer in different periods. With only a few empirical parameters, the proposed model will serve as guide in the field of surface irrigation. View Full-Text
Keywords: soil moisture; soil temperature; coupled water and heat transport; mathematical model soil moisture; soil temperature; coupled water and heat transport; mathematical model
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Ren, R.; Ma, J.; Cheng, Q.; Zheng, L.; Guo, X.; Sun, X. Modeling Coupled Water and Heat Transport in the Root Zone of Winter Wheat under Non-Isothermal Conditions. Water 2017, 9, 290.

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