干旱区生态环境知识资源中心(Arid): Evapotranspiration partitioning for multiple ecosystems within a dryland watershed: Seasonal variations and controlling factors

Arid

DOI	10.1016/j.jhydrol.2021.126483
	Evapotranspiration partitioning for multiple ecosystems within a dryland watershed: Seasonal variations and controlling factors
	Xu, Ziwei; Zhu, Zhongli; Liu, Shaomin; Song, Lisheng; Wang, Xiaochen; Zhou, Sha; Yang, Xiaofan; Xu, Tongren
通讯作者	Liu, SM (corresponding author), Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, 19 Xinjiekouwai St, Beijing 100875, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	598
英文摘要	Partitioning of evapotranspiration (ET) into evaporation (E) and transpiration (T) is challenging but important to better understand the mechanisms of water loss from the ground surface to the atmosphere, especially in semiarid and arid regions. In this study, the underlying water use efficiency (uWUE) method is compared with hydrometric and remote sensing-based ET partitioning methods. The uWUE method is considered to be a promising method for partitioning ET, and can also be used to obtain temporal continuous data with fine spatial representation. Thus, the uWUE method was used to partition ET in six typical ecosystems in the Heihe River basin (HRB), which is the second largest endorheic river basin in western China. During 2008-2016, the daily average contributions of T to ET (T/ET) were 0.53, 0.52, 0.59, 0.37, 0.56, and 0.59 in the alpine meadow, Qinghai spruce, maize, desert, Tamarix, and Populus euphratica-Tamarix ecosystems, respectively. The T/ET ratio exhibited obvious seasonal variations in alpine meadow, maize, Tamarix, and Populus euphratica-Tamarix ecosystems. The ET partitioning results were related to air temperature in all ecosystems, especially in areas with sufficient precipitation or irrigation water supply. The vapor pressure deficit was also a main controlling factor in the upper- and middle-reach ecosystems, especially in the Qinghai spruce ecosystem. Groundwater and/or soil moisture made high relative contributions (RCs, %) to the T/ET ratio of the riparian forest in the lower reaches. Additionally, the leaf area index also made a high RC to the T/ET ratio of deciduous vegetation. Determining the quantitative contribution of T to ET in the HRB is beneficial for water resource management to guide the rational allocation and efficient use of water resources.
英文关键词	Evapotranspiration partitioning Seasonal variation Controlling factors Heihe River basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000661813200198
WOS关键词	ENERGY-BALANCE CLOSURE ; HEIHE RIVER-BASIN ; CARBON-DIOXIDE ; EDDY-COVARIANCE ; USE EFFICIENCY ; SAP FLOW ; DAILY EVAPORATION ; ESTIMATING SOIL ; 2-SOURCE MODEL ; ISOTOPE METHOD
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
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/2XILL650/350904
作者单位	[Xu, Ziwei; Zhu, Zhongli; Liu, Shaomin; Wang, Xiaochen; Zhou, Sha; Yang, Xiaofan; Xu, Tongren] Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, 19 Xinjiekouwai St, Beijing 100875, Peoples R China; [Song, Lisheng] Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Karst Ecosyst Natl Observat &, Chongqing 400715, Peoples R China; [Zhou, Sha] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
推荐引用方式 GB/T 7714	Xu, Ziwei,Zhu, Zhongli,Liu, Shaomin,et al. Evapotranspiration partitioning for multiple ecosystems within a dryland watershed: Seasonal variations and controlling factors[J]. 北京师范大学,2021,598.
APA	Xu, Ziwei.,Zhu, Zhongli.,Liu, Shaomin.,Song, Lisheng.,Wang, Xiaochen.,...&Xu, Tongren.(2021).Evapotranspiration partitioning for multiple ecosystems within a dryland watershed: Seasonal variations and controlling factors.JOURNAL OF HYDROLOGY,598.
MLA	Xu, Ziwei,et al."Evapotranspiration partitioning for multiple ecosystems within a dryland watershed: Seasonal variations and controlling factors".JOURNAL OF HYDROLOGY 598(2021).