Spatial-Temporal Change of Actual Evapotranspiration and the Causes Based on the Advection-Aridity Model in the Weihe River Basin, China

doi:10.3390/w13030303

	Spatial-Temporal Change of Actual Evapotranspiration and the Causes Based on the Advection-Aridity Model in the Weihe River Basin, China
	Xu, Ruirui 1; Gao, Peng 1,2; Mu, Xingmin 1,2; Gu, Chaojun 3
刊名	WATER
	2021-02-01
卷号	13 期号:3 页码:22
关键词	evapotranspiration complementary relationship Advection– Aridity model Weihe River Basin
DOI	10.3390/w13030303
通讯作者	Gao, Peng(gaopeng@ms.iswc.ac.cn)
英文摘要	Evapotranspiration is a key process between the atmospheric hydrological cycle and the energy cycle, which has a great significance in understanding climate change and the rational use of water resources, especially for the Weihe River basin (WRB) (a basin in China experiencing a shortage of water resources). We investigated the spatial-temporal change of actual evapotranspiration (ETa) based on the daily meteorological variables of 22 meteorological stations and the annual streamflow of three hydrological stations from 1970 to 2018 in the WRB. The contributions of key meteorological variables to ETa changes and the sensitivity coefficient are also quantified. The temporal trends of ETa showed an increasing trend from 1970 to 2018, and the spatial distribution of ETa increased from northwest to southeast in the WRB. Increasing trends were detected in the multi-year average, spring, and winter, but only a few stations passed the significance test. Summer and autumn showed a decreasing trend, but this trend was not significant. Solar radiation is the most sensitive meteorological variable, followed by vapor pressure, wind speed, and mean temperature. Vapor pressure contributes the most to ETa changes, followed by solar radiation. In general, vapor pressure (relative humidity) is the dominant meteorological factor affecting ETa in the WRB. In addition to meteorological factors, the ETa is also affected by combined and complicated factors caused by precipitation and human activities. As an important part of the hydrological cycle, ETa has important research significance for water resources management, economy, agriculture, and ecology and results of this study may be helpful to further clarify the climate change and human activities impacts on the basin hydrological cycle.
资助项目	National Key Research and Development Program of China[2016YFC0501707]
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000615642100001
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136090]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Peng
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Changjiang Water Resources Commiss, Yangtze Soil Conservat Monitoring Ctr, Wuhan 430010, Peoples R China
推荐引用方式 GB/T 7714	Xu, Ruirui,Gao, Peng,Mu, Xingmin,et al. Spatial-Temporal Change of Actual Evapotranspiration and the Causes Based on the Advection-Aridity Model in the Weihe River Basin, China[J]. WATER,2021,13(3):22.
APA	Xu, Ruirui,Gao, Peng,Mu, Xingmin,&Gu, Chaojun.(2021).Spatial-Temporal Change of Actual Evapotranspiration and the Causes Based on the Advection-Aridity Model in the Weihe River Basin, China.WATER,13(3),22.
MLA	Xu, Ruirui,et al."Spatial-Temporal Change of Actual Evapotranspiration and the Causes Based on the Advection-Aridity Model in the Weihe River Basin, China".WATER 13.3(2021):22.