干旱区生态环境知识资源中心(Arid): Changes of temperature and precipitation and their impacts on runoff in the upper Taohe River in northwest China from 1956 to 2014

Arid

DOI	10.1007/s12665-019-8399-5
	Changes of temperature and precipitation and their impacts on runoff in the upper Taohe River in northwest China from 1956 to 2014
	Cheng, Lizhen 1,2; Ma, Longjian 3; Yang, Meixue 1; Wan, Guoning 1; Wang, Xuejia 1
通讯作者	Yang, Meixue
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2019
卷号	78 期号:14
英文摘要	Climate change has greatly affected regional hydrological processes at temporal and spatial scales, and much attention has been focused on how runoff changed under the background of global warming in recent years. In northwest China, Taohe River provides major water resource to several semi-arid regions. To quantificationally estimate water resource, the influence of precipitation and temperature on runoff needs to be further studied. In this paper, hydro-meteorological data from 1956 to 2014 were used to analyze the changes of temperature, precipitation and runoff based on Mann-Kendall test and double cumulative curve method. The main findings were that the temperature had a significant increasing trend (0.26 degrees C/10a), while precipitation showed an insignificant increasing trend (0.9 mm/10a). Runoff exhibited a significant decreasing trend (-2.7x10(8) m(3)/10a) and break point of the runoff occurred in 1987. Thus, compared with benchmark value during the period 1956-1987, runoff after 1987 was reduced to 70.7% of the previous level on average, from 37.5x10(8) m(3) in 1956-1987 to 26.5x10(8) m(3) in 1988-2014, with a decreasing rate of 29.3%; and runoff changes in each month were all decreased after 1987, particularly in September by 41.29%. Double cumulative curve and correlation results revealed that precipitation was the dominant factor controlling changes in runoff and their correlation coefficient reached up to 0.73. The magnitude of precipitation dominated runoff from April to October, accounting for more than 95% of the total annual runoff. However, runoff decreased more dramatically than precipitation after 1987, which indicated that there were some non-precipitation factors, like the increase of evaporation caused by temperature rise and human activities, responsible for the decline of runoff from 1988 to 2014. Some large-scale climate factors had a good tele-connective relation with variability of runoff. Overall, this study exhibited a scientific fact of runoff decreasing in the upper Taohe River basin and aimed to provide abasic direction for reasonable allocation of water resources by the Taohe River Diversion Project sustainably.
英文关键词	Runoff variation Climate changes Mann-Kendall test The upper Taohe River basin
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000475972700001
WOS关键词	RIO-DE-JANEIRO ; CLIMATE-CHANGE ; YELLOW-RIVER ; LONG-TERM ; ARID REGION ; QUANTITATIVE ASSESSMENT ; TIBETAN PLATEAU ; TEMPORAL TRENDS ; LOESS PLATEAU ; TARIM RIVER
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215424
作者单位	1.Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China; 3.Lintao Hydrol Water Resources Survey Bur, Dingxi 730500, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Lizhen,Ma, Longjian,Yang, Meixue,et al. Changes of temperature and precipitation and their impacts on runoff in the upper Taohe River in northwest China from 1956 to 2014[J],2019,78(14).
APA	Cheng, Lizhen,Ma, Longjian,Yang, Meixue,Wan, Guoning,&Wang, Xuejia.(2019).Changes of temperature and precipitation and their impacts on runoff in the upper Taohe River in northwest China from 1956 to 2014.ENVIRONMENTAL EARTH SCIENCES,78(14).
MLA	Cheng, Lizhen,et al."Changes of temperature and precipitation and their impacts on runoff in the upper Taohe River in northwest China from 1956 to 2014".ENVIRONMENTAL EARTH SCIENCES 78.14(2019).