干旱区生态环境知识资源中心(Arid): 干旱区土壤蒸发及水热耦合运移模式研究

Arid

	干旱区土壤蒸发及水热耦合运移模式研究
其他题名	Study on Soil Evaporation and Coupling Transmission of Soil Moisture and Heat in Arid Areas
	孟春雷; 崔建勇
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2007
卷号	24 期号:2 页码:141-145
中文摘要	干旱地区土壤蒸发模拟及水热耦合运移研究,对干旱地区水资源利用、陆面过程及气候模式研究具有重要意义.通过对土壤蒸发与内部水分传输机理的深入了解,推导出土壤水热传输与土壤蒸发模式.为了比较模式模拟结果,利用本模式对CoLM陆面过程模式进行改进,并采用黑河沙漠站观测资料,对模式改进前后土壤蒸发与土壤温度和湿度模拟结果进行了对比.结果表明:改进后模式能够更好地模拟土壤温度与土壤蒸发,干旱条件下应考虑水汽对土壤水分与温度传输的影响.
英文摘要	Simulation of soil evaporation and the study on coupling transmission of soil moisture and heat in arid areas are very important in researching water resources utilization, land surface evolution and climate model. In this paper, the models of coupling transmission of soil moisture and heat and topsoil evaporation are derived so as to accurately estimate soil evaporation, soil temperature and soil moisture content in arid areas based on under-standing the mechanism of soil evaporation and coupling transmission of soil moisture and heat. In order to compare the simulated results, the models are used to modify the CoLM land surface model. The simulated results of soil evaporation, soil temperature and soil moisture content before and after modifying the CoLM model are compared based on the observation data collected by Heihe Desert Research Station. The conclusions are as follows: (1) Soil evaporation in arid areas can be simulated well if the internal transmission of water vapor in soil is con-sidered in developing soil evaporation model, and the trend of gradual soil evaporation reduction with the gradual drying-up of topsoil can be accurately simulated; (2) At the daytime, the topsoil temperature is high but the deep-soil one is low, so a downward transmission of soil moisture occurs and the soil evaporation is relatively decreased; at night, however, the topsoil temperature is low but the deep-soil one is high, so an upward transmission of soil moisture occurs and the soil evaporation is relatively increased; (3) There is an interaction between the soil moisture and heat transmissions, and the soil temperature can be simulated well if the coupling transmission of soil moisture and heat is considered; (4) The gradual during-up of topsoil in arid areas can be accurately simulated if the effects of coupling transmission of soil moisture and heat and water vapor transmission are con-sidered.
中文关键词	土壤蒸发 ; 水热耦合运移 ; 水汽传输 ; 旱区
英文关键词	soil evaporation coupling transmission of soil moisture and heat water vapor transmission arid area
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:2721332
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220970
作者单位	孟春雷, 北京师范大学地理学与遥感科学学院,遥感与地理信息系统研究中心, 北京 100875, 中国.; 崔建勇, 北京师范大学地理学与遥感科学学院,遥感与地理信息系统研究中心, 北京 100875, 中国.
推荐引用方式 GB/T 7714	孟春雷,崔建勇. 干旱区土壤蒸发及水热耦合运移模式研究[J]. 北京师范大学,2007,24(2):141-145.
APA	孟春雷,&崔建勇.(2007).干旱区土壤蒸发及水热耦合运移模式研究.干旱区研究,24(2),141-145.
MLA	孟春雷,et al."干旱区土壤蒸发及水热耦合运移模式研究".干旱区研究 24.2(2007):141-145.