Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions

doi:10.1016/j.jhydrol.2016.10.047

	Investigation of factors affecting intra-annual variability of evapotranspiration and streamflow under different climate conditions
	Zhang, Dan 1; Liu, Xiaomang 2; Zhang, Qi 1; Liang, Kang 2; Liu, Changming 2
刊名	JOURNAL OF HYDROLOGY
	2016-12-01
卷号	543 页码:759-769
关键词	Intra-annual variability Evapotranspiration Streamflow Affecting factors Attribution Different climate conditions
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2016.10.047
通讯作者	Liu, Xiaomang(liuxm@igsnrr.ac.cn)
英文摘要	Investigating 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.
资助项目	Natural Science Foundation of China[41401032] ; Natural Science Foundation of China[41330529] ; Natural Science Foundation of China[41501032] ; Natural Sciences Foundation of Jiangsu Province[BK20141059]
WOS关键词	BUDYKOS HYDROLOGICAL MODEL ; SURFACE WIND SPEEDS ; WATER-BALANCE ; INTERANNUAL VARIABILITY ; VEGETATION CHANGES ; NDVI DATA ; CATCHMENT ; EVAPORATION ; CHINA ; SATELLITE
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000390735900046
资助机构	Natural Science Foundation of China ; Natural Sciences Foundation of Jiangsu Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/65276]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Xiaomang
作者单位	1.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
推荐引用方式 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.