Response of streamflow to environmental changes: A Budyko-type analysis based on 144 river basins over China

doi:10.1016/j.scitotenv.2019.02.011

	Response of streamflow to environmental changes: A Budyko-type analysis based on 144 river basins over China
	Li, Yanzhong 1; Liu, Changming 1,2; Yu, Wenjun 1; Tian, Di 3; Bai, Peng 2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-05-10
卷号	664 页码:824-833
关键词	Aridity index Budyko analysis Climate regions Environmental change Sensitivity analysis
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.02.011
通讯作者	Yu, Wenjun(wj.yu@nuist.edu.cn)
英文摘要	Understanding response of streamflow to environmental changes is crucial for large-scale water resources management and ecosystem restoration. There is no consensus on how environmental change influence streamflow in different regions across climate gradient, as previous studies mainly focused on a single river basin or climate region. This study analyzed the variations of aridity index and its contributions to streamflow change based on Budyko's framework approach using bias-corrected precipitation measurement, parameters-optimized potential evapotranspiration and observed streamflow in 144 basins across China. The parameter n in the Budyko type equation exhibits significant spatial heterogeneity, with larger values in the water-limited region than in the energy-limited region, which suggests more pronounced impact of basin characteristic or vegetation change on hydrological cycle. The absolute value of sensitivity coefficient in the water-limited region (-256) was larger than both equitant (-2.13) and energy limited region (-1.57), indicating that the streamflow was more sensitive to aridity index change in the water-limited region than in the equitant and energy-limited regions. The dominant factor affecting streamflow under energy-limited and equitant conditions is aridity index (i.e. climate change), with median relative contribution rates of 79.9% and 55.5%, respectively. In contrast, non-climatic factors dominate the variation of streamflow in the water-limited region, the effect of climate change on streamflow has been offset by other factors. This study suggests that the water management practices, such as water diversion across river basins and ecological restorations, should fully consider the differences in hydrological responses to climatic conditions. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41701019] ; Startup Foundation for Introducing Talent of Nanjing University of Information Science Technology[2017r069] ; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences[WL2017004]
WOS关键词	CLIMATE VARIABILITY ; POTENTIAL EVAPORATION ; HYDROLOGICAL CYCLE ; GLOBAL ASSESSMENT ; TIBETAN PLATEAU ; WATER-BALANCE ; ARID REGION ; RUNOFF ; EVAPOTRANSPIRATION ; PRECIPITATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000460245600078
资助机构	National Natural Science Foundation of China ; Startup Foundation for Introducing Talent of Nanjing University of Information Science Technology ; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49159]
专题	中国科学院地理科学与资源研究所
通讯作者	Yu, Wenjun
作者单位	1.Nanjing Univ Informat Sci & Technol, Sch Hydrol & Water Resources, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Auburn Univ, Dept Crop Soil & Environm Sci, Auburn, AL 36849 USA
推荐引用方式 GB/T 7714	Li, Yanzhong,Liu, Changming,Yu, Wenjun,et al. Response of streamflow to environmental changes: A Budyko-type analysis based on 144 river basins over China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,664:824-833.
APA	Li, Yanzhong,Liu, Changming,Yu, Wenjun,Tian, Di,&Bai, Peng.(2019).Response of streamflow to environmental changes: A Budyko-type analysis based on 144 river basins over China.SCIENCE OF THE TOTAL ENVIRONMENT,664,824-833.
MLA	Li, Yanzhong,et al."Response of streamflow to environmental changes: A Budyko-type analysis based on 144 river basins over China".SCIENCE OF THE TOTAL ENVIRONMENT 664(2019):824-833.