DOI: 10.1029/2017JG004119
Scopus记录号: 2-s2.0-85052802675
论文题名: Relationships Among Nutrient and Sediment Fluxes, Hydrological Variability, Fire, and Land Cover in Coastal California Catchments
作者: Aguilera R. ; Melack J.M.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 8 起始页码: 2568
结束页码: 2589
语种: 英语
英文关键词: coastal catchments
; fluxes
; hydroclimatic variability
; land cover
; nutrients and sediments
; wildfire
英文摘要: Catchments along California's coast, and those with mediterranean climates elsewhere, experience large seasonal and interannual variations in rainfall, and occasional fires; land cover varies from natural vegetation to agricultural and urban development. Multiyear sampling of streams, with intensive collections during rainfall, and continuous measurements of stage, was used to determine the magnitude and variation of concentrations and fluxes of nutrients and suspended sediments during rainfall events and per year from catchments bordering the Santa Barbara Channel. Annual rainfall varied from 18 to 122 cm in water years 2002 through 2015. Hydrological variability, catchment topography, and land cover have strong statistical relationships to nutrient and suspended sediment fluxes. The link between nutrient fluxes and runoff during storms was strongest in sites with greater portions of impervious surfaces. The occurrence of fires followed by above average rainfall resulted in highest ammonium and suspended sediment fluxes. Nitrate fluxes during large storms in undeveloped catchments following wildfire were similar in magnitude to storm fluxes generated in catchments with intensive agriculture. Decreasing storm fluxes were observed with increasing cumulative discharge within a water year, which is consistent with the reduction of flux from each subsequent storm as the rainy season progressed. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113377
Appears in Collections: 气候减缓与适应
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作者单位: Marine Science Institute, University of California, Santa Barbara, CA, United States; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, United States
Recommended Citation:
Aguilera R.,Melack J.M.. Relationships Among Nutrient and Sediment Fluxes, Hydrological Variability, Fire, and Land Cover in Coastal California Catchments[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(8)