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Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions
Zhang, Dan1; Liu, Xiaomang2; Zhang, Qi1; Liang, Kang2; Liu, Changming2
2016-12-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume543Pages:759-769
Corresponding AuthorLiu, Xiaomang(liuxm@igsnrr.ac.cn)
AbstractInvestigating the factors that affect intra-annual evapotranspiration (ET) and streamflow variability is important to regional hydrological cycles and energy balance research. In this study, ET and streamflow variability (defined as their standard deviations) are attributed to precipitation, potential evapotranspiration (ET0) and total water storage change (TWSC) based on a Budyko-based approach at 282 catchments in China. The results show that the Budyko-based approach satisfactorily simulates the intra-annual ET and streamflow variability (R-2 of 0.63-0.84). The dominant contributor to ET variability is ET under energy-limited condition (aridity index <= 0.76), whereas the dominant contributor is precipitation under equitant (0.76 < aridity index <= 1.35) and water-limited conditions (aridity index 1.35). The contribution of ET0 to ET variability decreases with the aridity index, whereas the contribution of precipitation to ET variability increases with the aridity index. However, the dominant contributor to streamflow variability is precipitation under all the three climate conditions, which is unaffected by the aridity index. TWSC enhances ET variability under energy-limited condition and inhibits ET variability under water-limited and equitant conditions. However, TWSC inhibits streamflow variability under all the three climate conditions. In addition, geography and vegetation also influence the contributors to ET and streamflow variability. The effects of geography on the contributors to streamflow variability are larger than that to ET variability. In contrast, the impacts of vegetation on the contributors to ET variability are larger than that to streamflow variability. This study demonstrates that the mechanism of ET variability under different climate conditions is much more complex than that of streamflow variability, suggesting that more attention should be given to ET for water-energy modeling, hydrological predictions and local water management. (C) 2016 Elsevier B.V. All rights reserved.
KeywordIntra-annual variability Evapotranspiration Streamflow Affecting factors Attribution Different climate conditions
DOI10.1016/j.jhydrol.2016.10.047
WOS KeywordBUDYKOS HYDROLOGICAL MODEL ; SURFACE WIND SPEEDS ; WATER-BALANCE ; INTERANNUAL VARIABILITY ; VEGETATION CHANGES ; NDVI DATA ; CATCHMENT ; EVAPORATION ; CHINA ; SATELLITE
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of China[41401032] ; Natural Science Foundation of China[41330529] ; Natural Science Foundation of China[41501032] ; Natural Sciences Foundation of Jiangsu Province[BK20141059]
Funding OrganizationNatural Science Foundation of China ; Natural Sciences Foundation of Jiangsu Province
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000390735900046
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/65277
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLiu, Xiaomang
Affiliation1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Dan,Liu, Xiaomang,Zhang, Qi,et al. Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions[J]. JOURNAL OF HYDROLOGY,2016,543:759-769.
APA Zhang, Dan,Liu, Xiaomang,Zhang, Qi,Liang, Kang,&Liu, Changming.(2016).Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions.JOURNAL OF HYDROLOGY,543,759-769.
MLA Zhang, Dan,et al."Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions".JOURNAL OF HYDROLOGY 543(2016):759-769.
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