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	Root Water Uptake Model Considering Soil Temperature
	Lv G. H. ; Hu W. ; Kang Y. H. ; Liu B. C. ; Li L. ; Song J. Q.
	2013
关键词	Irrigation method Root water uptake Soil temperature Soil water simulation sprinkler irrigation winter-wheat resistance simulation heat air
英文摘要	A field experiment was carried out to research the effect of soil temperature distribution on root water uptake in soil water simulation. Soil temperature distribution patterns under border irrigation and surface drip irrigation were researched. The root water uptake model was modified based on the effect of soil temperature on root water uptake. Results showed soil temperature profile distribution was greatly influenced by irrigation method. The range of temperature was larger under border irrigation, with the temperature being 3-6 degrees C higher in 0-20 cm depth than in 20-100 cm depth. Except for the top layer under surface drip irrigation, mean soil temperature showed the trend of exponential decay throughout the soil profile. The relationship between temperature and water uptake rate was expressed in exponential function. With the modification of the root water uptake model as affected by temperature profile distribution, the value of the root mean square error between the simulated and observed soil water decreased from approximately 0.04 to 0.02 in the top layer under border irrigation, but showed no obvious difference under surface drip irrigation. When soil temperature differed greatly in the top layer from the deep layer, the root water uptake model considering soil temperature could improve the precision of soil water simulation. The results indicated that the modified root water uptake model could be used to simulate soil water dynamics. DOI: 10.1061/(ASCE)HE.1943-5584.0000642. (C) 2013 American Society of Civil Engineers.
出处	Journal of Hydrologic Engineering
卷	18
期	4
页	394-400
收录类别	SCI
语种	英语
ISSN号	1084-0699
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30350]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Lv G. H.,Hu W.,Kang Y. H.,et al. Root Water Uptake Model Considering Soil Temperature. 2013.

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