干旱区生态环境知识资源中心(Arid): Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events

Arid

DOI	10.1002/hyp.14720
	Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events
	Wilson, Stacy; Bhaskar, Aditi S.; Choat, Benjamin; Kampf, Stephanie; Green, Timothy R.; Hopkins, Kristina G.
通讯作者	Bhaskar, AS
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2022
卷号	36 期号:10
英文摘要	A thorough understanding of how urbanization affects stream hydrology is crucial for effective and sustainable water management, particularly in rapidly urbanizing regions. This study presents a comprehensive analysis of changes in streamflow response to rainfall events across a rural to urban gradient in the semi-arid area of Denver, Colorado. We used 8 years of April to October instantaneous streamflow data in 21 watersheds ranging in size from 0.8 to 90 km(2) and with impervious areas ranging from 1% to 47%. With these data, we applied a semi-automated method to identify a total of 2877 streamflow responses, which were analysed for event-based metrics of peak flow, runoff depth, runoff to rainfall ratio, time to peak, duration and number of streamflow responses to rainfall events. We also determined whether streamflow responses could be predicted by a precipitation threshold. Watersheds with >10% impervious cover had a precipitation threshold of 1-2 mm/hr needed to produce a streamflow response, compared to thresholds of 4-36 mm/hr for watersheds with less than 10% impervious surface cover. This lower precipitation threshold in more impervious watersheds led to more frequent streamflow responses. On average, streamflow responses had shorter duration and higher peak flows in watersheds with more impervious surface cover. In contrast to other regions, runoff depth, runoff to rainfall ratio and time to peak either gave mixed results or did not vary significantly with imperviousness. These alterations in streamflow response to rainfall events indicate the specific ways that urban development changes how streams respond to rain events in a semi-arid setting. This work points to the need for local adaptation of stormwater management to mitigate the effects of streamflow changes with urbanization.
英文关键词	grasslands hydrograph semi-arid hydrology stormwater threshold response urbanization
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000869408800001
WOS关键词	URBAN-DEVELOPMENT ; RUNOFF ; WATER ; SUSTAINABILITY ; IMPERVIOUSNESS ; PATTERNS ; CLIMATE ; PEAKS ; FLOW
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393055
推荐引用方式 GB/T 7714	Wilson, Stacy,Bhaskar, Aditi S.,Choat, Benjamin,et al. Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events[J],2022,36(10).
APA	Wilson, Stacy,Bhaskar, Aditi S.,Choat, Benjamin,Kampf, Stephanie,Green, Timothy R.,&Hopkins, Kristina G..(2022).Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events.HYDROLOGICAL PROCESSES,36(10).
MLA	Wilson, Stacy,et al."Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events".HYDROLOGICAL PROCESSES 36.10(2022).