干旱区生态环境知识资源中心(Arid): Drought Propagation in Contiguous US Watersheds: A Process-Based Understanding of the Role of Climate and Watershed Properties

Arid

DOI	10.1029/2020WR027755
	Drought Propagation in Contiguous US Watersheds: A Process-Based Understanding of the Role of Climate and Watershed Properties
	Apurv, Tushar; Cai, Ximing
通讯作者	Cai, XM
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2020
卷号	56 期号:9
英文摘要	Drought impacts on the society and environment are influenced by how droughts propagate through the hydrologic cycle; however, the physical processes involved in drought propagation are not well understood. In this study, a physically based hydrologic model is used to understand the drought propagation mechanisms and their controlling factors in multiple watersheds selected from different regions of the contiguous United States (CONUS). The characteristics of hydrologic droughts are found to be significantly different in three regions of the CONUS: (1) western U.S. watersheds have long and intense streamflow droughts, (2) Great Plains and southwest U.S. watersheds have low intensity and duration of streamflow droughts, and (3) eastern U.S. watersheds have short but intense streamflow droughts. This spatial pattern of hydrologic drought characteristics is found to coincide with the pattern of climate properties. Highly seasonal recharge driven by winter precipitation or snowmelt leads to longer streamflow droughts in the western United States; whereas humid climate with low seasonality in the eastern United States leads to shorter streamflow droughts. Furthermore, the storage-discharge relationship is identified as a key watershed property which controls the intensity of hydrologic droughts. Higher sensitivity of baseflow to watershed storage in the western and the eastern U.S. watersheds leads to more intense streamflow droughts in these regions. In the Great Plains and southwest United States, watersheds have a lower sensitivity of baseflow to catchment storage which, combined with the highly arid climate, leads to low variability in baseflow, and in turn results in low intensity of streamflow droughts in the region.
英文关键词	drought propagation hydrologic processes storage-discharge relationship seasonality aridity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000578452200054
WOS关键词	METEOROLOGICAL DROUGHT ; HYDROLOGICAL DROUGHTS ; CATCHMENT ; INDEX ; FLOW ; SENSITIVITY ; RECESSION ; RAINFALL ; SCALE ; VULNERABILITY
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326794
作者单位	[Apurv, Tushar; Cai, Ximing] Univ Illinois, Dept Civil & Environm Engn, VenTe Chow Hydrosyst Lab, Urbana, IL 61820 USA
推荐引用方式 GB/T 7714	Apurv, Tushar,Cai, Ximing. Drought Propagation in Contiguous US Watersheds: A Process-Based Understanding of the Role of Climate and Watershed Properties[J],2020,56(9).
APA	Apurv, Tushar,&Cai, Ximing.(2020).Drought Propagation in Contiguous US Watersheds: A Process-Based Understanding of the Role of Climate and Watershed Properties.WATER RESOURCES RESEARCH,56(9).
MLA	Apurv, Tushar,et al."Drought Propagation in Contiguous US Watersheds: A Process-Based Understanding of the Role of Climate and Watershed Properties".WATER RESOURCES RESEARCH 56.9(2020).