干旱区生态环境知识资源中心(Arid): Perennial and Non-Perennial Streamflow Regime Shifts Across California, USA

Arid

DOI	10.1029/2023WR035768
	Perennial and Non-Perennial Streamflow Regime Shifts Across California, USA
	Ayers, Jessica R.; Yarnell, Sarah M.; Baruch, Ethan; Lusardi, Robert A.; Grantham, Theodore E.
通讯作者	Ayers, JR
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2024
卷号	60 期号:4
英文摘要	Despite rises in drought frequency and human water demands, streamflow regime shifts from perennial to non-perennial have not been evaluated in many arid/semi-arid regions. To document shifts, we created a methodology that classifies streams as naturally perennial or non-perennial. Our classification used historical, minimally disturbed-quality USGS streamflow gages (1950-2015) across California. The number of consecutive zero flow days (>= 5 days) was used to classify 61% (96/158) and 39% (62/158) of gages as perennial and non-perennial, respectively. We developed a random forest model to predict flow regime class based on climate and watershed characteristics. To identify regime shifts, we compared the observed class of contemporary (1980-2023) minimally disturbed and disturbed gages with their modeled, natural class. For most minimally disturbed gages, the observed and natural predicted classes were the same, but 13% (7/52) of gages had a modeled perennial regime with an observed non-perennial class, indicating a drying trend. Among disturbed gages, 22% (64/290) shifted from perennial to non-perennial and 7% (21/290) from non-perennial to perennial. Trends in the minimum 7-day moving average and number of zero-flow days provided further evidence of drying at minimally disturbed streams, but no pattern at disturbed gages. Our results indicate that few minimally disturbed perennial streams have become non-perennial to date, but many streams have experienced drying from climate. Streams impacted by human activities had greater drying rates, but regulation has caused some non-perennial streams to become perennial. By quantifying expected natural streamflow regimes, this work can help monitor, manage, and conserve stream ecosystems. Our approach classified 158 historical (1950-2015) minimally disturbed gages as perennial (61%) and non-perennial (39%) in California Among 52 active minimally disturbed gages, 13% transitioned to non-perennial (1980-2022), indicating a drying trend in response to climate For 290 disturbed gages, 29% showed shifts in both directions, highlighting distinct anthropogenic effects on streamflow
英文关键词	intermittent streams streamflow regime classification minimally disturbed conditions anthropogenic change hydrological drought California
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:001207781300001
WOS关键词	ENVIRONMENTAL FLOWS ; UNITED-STATES ; INTERMITTENT ; GROUNDWATER ; PATTERNS ; DAMS ; DEPLETION ; RIVER ; URBANIZATION ; MANAGEMENT
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/2XILL650/405929
推荐引用方式 GB/T 7714	Ayers, Jessica R.,Yarnell, Sarah M.,Baruch, Ethan,et al. Perennial and Non-Perennial Streamflow Regime Shifts Across California, USA[J],2024,60(4).
APA	Ayers, Jessica R.,Yarnell, Sarah M.,Baruch, Ethan,Lusardi, Robert A.,&Grantham, Theodore E..(2024).Perennial and Non-Perennial Streamflow Regime Shifts Across California, USA.WATER RESOURCES RESEARCH,60(4).
MLA	Ayers, Jessica R.,et al."Perennial and Non-Perennial Streamflow Regime Shifts Across California, USA".WATER RESOURCES RESEARCH 60.4(2024).