干旱区生态环境知识资源中心(Arid): Characteristics and propagation of meteorological and hydrological droughts in eastern Gansu, a typical semi-arid region, China

Arid

DOI	10.1002/joc.8149
	Characteristics and propagation of meteorological and hydrological droughts in eastern Gansu, a typical semi-arid region, China
	Zou, Rui; Yin, Yixing; Wang, Xiaojun; Zhang, Zengxin; Ma, Xieyao; Liu, Mengyang; Ullan, Irfan
通讯作者	Yin, YX
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2023
卷号	43 期号:12 页码:5327-5347
英文摘要	The meteorological drought (MD) is the precursor of the hydrological drought (HD), and understanding the propagation process from MD to HD is of great significance for the early warning of HD. Based on the theory of run and Bayesian networks, this study uses the standardized precipitation index (SPI), standardized precipitation evapotranspiration index (SPEI) and standardized streamflow index (SSI) to explore the characteristics and propagation of MD and HD in the regions of eastern Gansu, China. The results indicate that: (1) The region was mainly wet (dry) and the wetness (dryness) was stronger before (after) 2000 when reflected by SSI. The frequency is higher based on SPI and SPEI than that based on SSI, while the duration and magnitude are lower than those based on SSI. (2) The propagation time from MD to HD is generally within 1-10 months. After the occurrence of a certain level of MD, it is most likely to propagate to HD events that are relatively weaker than the MD. Besides, the higher the intensity level of MD, the shorter the propagation time to HD, and the shorter for cumulative occurrence probability of HD to approach 1.0. (3) The increase in temperature and decrease in precipitation, runoff and runoff coefficient may contribute to the dryness after 2000. Moreover, the weakened propagation from MD to HD may be due to the rapid increase of water resource consumption caused by intensive anthropogenic activities in the study area. From the above results, this study found some propagation characteristics from MD to HD in a semi-arid and semi-humid watershed, which can provide a supplement for revealing the drought mechanism and can assist in the management and planning of water resources in China.
英文关键词	Bayesian networks drought propagation hydrological drought meteorological drought theory of run
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001019706000001
WOS关键词	CLIMATE ; SENSITIVITY ; INDEX ; RIVER ; INTENSIFICATION ; VULNERABILITY ; VARIABILITY ; ATTRIBUTION ; IMPACT ; ROLES
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396973
推荐引用方式 GB/T 7714	Zou, Rui,Yin, Yixing,Wang, Xiaojun,et al. Characteristics and propagation of meteorological and hydrological droughts in eastern Gansu, a typical semi-arid region, China[J],2023,43(12):5327-5347.
APA	Zou, Rui.,Yin, Yixing.,Wang, Xiaojun.,Zhang, Zengxin.,Ma, Xieyao.,...&Ullan, Irfan.(2023).Characteristics and propagation of meteorological and hydrological droughts in eastern Gansu, a typical semi-arid region, China.INTERNATIONAL JOURNAL OF CLIMATOLOGY,43(12),5327-5347.
MLA	Zou, Rui,et al."Characteristics and propagation of meteorological and hydrological droughts in eastern Gansu, a typical semi-arid region, China".INTERNATIONAL JOURNAL OF CLIMATOLOGY 43.12(2023):5327-5347.