Arid
DOI10.1016/j.agrformet.2017.11.011
Assessing the impacts of an ecological water diversion project on water consumption through high-resolution estimations of actual evapotranspiration in the downstream regions of the Heihe River Basin, China
Zhou, Yanzhao1,2; Li, Xin1,2,3; Yang, Kun3,4; Zhou, Jian1
通讯作者Li, Xin
来源期刊AGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
EISSN1873-2240
出版年2018
卷号249页码:210-227
英文摘要

Ecological Water Diversion Projects (EWDPs) have been implemented in several endorheic river basins in the arid region of northwest China since the beginning of the new millennium to restore the deteriorated ecosystems. However, the effects of these EWDPs are difficult to evaluate quantitatively. Here, we assessed changes in water use in Ejin Oasis in the downstream region of the Heihe River Basin, which is a typical endorheic river basin in northwest China, based on the estimated evapotranspiration (ET) during the growing season (May to October) in 2000 (before the EWDP) and 2014 (after the EWDP). The ET estimates were based on the modified surface energy balance algorithm for land (M-SEBAL) model and Landsat images. The estimated ET was validated against observations using eddy covariance towers installed on different landscapes in 2014 and was found to have a root mean square error of 1.20 mm day(-1) and a coefficient of determination of 0.67 at the footprint scale on satellite overpass days. The estimated ETs in two years were also compared with another remote sensing product that showed a similar spatial pattern, with a spatial mean difference of 4 mm and 0.5 mm, respectively. The estimated ET was then used to evaluate the impact of the EWDP on water consumption. The ET over different land use and land cover types increased, with a mean increase of 52% over the 15 years of the implementation of the EWDP in Ejin Oasis. The water consumption in Ejin Oasis in 2014 was approximately twice that in 2000. Among the changes, water consumption by croplands increased significantly, with a maximum increase of 264% because of cropland expansion and increased ET. The increases in water consumption by forests and grasslands were 60% and 25%, respectively. The lake area expanded drastically (from 0 to 37.46 km(2)), and the corresponding water consumption caused by evaporation was zero in 2000 and approximately 3.9 x 10(7) m(3) from May to October in 2014. This work demonstrates that estimates of the ET based on remote sensing can be used as reliable indicators for comprehensive assessments of the impacts of the EWDPs.


英文关键词Evapotranspiration Ejin Oasis Landsat Water consumption EWDP
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000424180100018
WOS关键词ENERGY-BALANCE CLOSURE ; APERTURE SCINTILLOMETER MEASUREMENTS ; NET ECOSYSTEM EXCHANGE ; EDDY-COVARIANCE ; FLUX FOOTPRINT ; CLOUD SHADOW ; EJINA BASIN ; SEBAL MODEL ; SURFACE ; GROUNDWATER
WOS类目Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构中国科学院西北生态环境资源研究院 ; 清华大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207305
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Remote Sensing Gansu Prov, Lanzhou, Gansu, Peoples R China;
2.Univ Chinese Acad Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
4.Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Zhou, Yanzhao,Li, Xin,Yang, Kun,et al. Assessing the impacts of an ecological water diversion project on water consumption through high-resolution estimations of actual evapotranspiration in the downstream regions of the Heihe River Basin, China[J]. 中国科学院西北生态环境资源研究院, 清华大学,2018,249:210-227.
APA Zhou, Yanzhao,Li, Xin,Yang, Kun,&Zhou, Jian.(2018).Assessing the impacts of an ecological water diversion project on water consumption through high-resolution estimations of actual evapotranspiration in the downstream regions of the Heihe River Basin, China.AGRICULTURAL AND FOREST METEOROLOGY,249,210-227.
MLA Zhou, Yanzhao,et al."Assessing the impacts of an ecological water diversion project on water consumption through high-resolution estimations of actual evapotranspiration in the downstream regions of the Heihe River Basin, China".AGRICULTURAL AND FOREST METEOROLOGY 249(2018):210-227.
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