DOI: 10.1002/grl.50921
论文题名: Increasing summer river discharge in southern California, USA, linked to urbanization
作者: Townsend-Small A. ; Pataki D.E. ; Liu H. ; Li Z. ; Wu Q. ; Thomas B.
刊名: Geophysical Research Letters
ISSN: 0094-8572
EISSN: 1944-8303
出版年: 2013
卷: 40, 期: 17 起始页码: 4643
结束页码: 4647
语种: 英语
英文关键词: hydrology
; irrigation
; stream flow
; urban
; wastewater
Scopus关键词: Atmospheric precipitation
; Ground water recharge
; Large amounts
; River discharge
; Source region
; Southern California
; Treated wastewater
; urban
; Hydrology
; Irrigation
; Rivers
; Stream flow
; Wastewater
; Wastewater treatment
; Recharging (underground waters)
; groundwater
; land cover
; recharge
; river discharge
; river flow
; runoff
; streamflow
; summer
; urbanization
; wastewater
; California
; Los Angeles River
; United States
英文摘要: Semi-arid southern California relies heavily on imported water for domestic use. A synthesis of river discharge data in this region reveals that summer (June, July, and August) river discharge in watersheds that have at least 50% urban, suburban, and/or commercial land cover has increased by 250% or more over the past half-century, without any substantial precipitation during these months. Total annual discharge in the Los Angeles River has also increased at levels up to several hundred percent. Three factors likely contribute to our observations: (1) increased groundwater recharge rates from leaking water pipelines, (2) inputs of treated wastewater into streams and rivers, and (3) increased runoff or recharge due to over-irrigation of ornamental landscaping. In the southwestern United States, water importation consumes large amounts of energy and contributes to decline of river flows in source regions. Here we show that water importation also increases river flows in urban areas. Key Points River flow in urbanized S. California has increased in the past half-century No change in atmospheric precipitation over the study period Change in river discharge is due to long-distance water importation ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883735037&doi=10.1002%2fgrl.50921&partnerID=40&md5=d7778930ce18c02b7753b4fef80381bc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5836
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geology, University of Cincinnati, 500 Geology-Physics Building, Cincinnati, OH 45221, United States
Recommended Citation:
Townsend-Small A.,Pataki D.E.,Liu H.,et al. Increasing summer river discharge in southern California, USA, linked to urbanization[J]. Geophysical Research Letters,2013-01-01,40(17).