Arid
DOI10.1002/hyp.13742
Sensitivity of nitrate concentration-discharge patterns to soil nitrate distribution and drainage properties in the vertical dimension
Chen, Xiaoli; Tague, Christina L.; Melack, John M.; Keller, Arturo A.
通讯作者Chen, Xiaoli
来源期刊HYDROLOGICAL PROCESSES
ISSN0885-6087
EISSN1099-1085
出版年2020
卷号34期号:11页码:2477-2493
英文摘要We propose a conceptual model that examines the 'variable source area' (VSA) and 'nitrate flushing' hypothesis in the vertical direction, and use this approach to explain nitrate concentration-discharge relationships in a semi-arid watershed. We use an eco-hydrology simulation model (RHESSys) to show that small changes in the vertical distribution of nitrate mass and their interaction with soil hydraulic conductivity can result in abrupt changes in the nitrate concentration-discharge relationship. We show that the estimated concentration-discharge relationship is sensitive to the parameters governing soil vertical nitrate distribution and soil hydraulic conductivity, at both patch scale and watershed scale, where lateral redistribution of water and nitrate is also accounted for. Given heterogeneity in nitrogen inputs, uptake processes, soil drainage and storage processes, substantial variation in parameters that describe rate of changes in vertical distribution of soil nitrate and hydraulic properties is likely both within and between watersheds. Thus, we argue that vertical 'variable source area' processes may be as important as lateral VSA in determining concentration discharge relationships.
英文关键词concentration-discharge relationship nitrate vertical distribution variable source area
类型Article
语种英语
国家USA
开放获取类型Green Published, Bronze
收录类别SCI-E
WOS记录号WOS:000520777600001
WOS关键词TEMPERATE FORESTS ; NITROGEN UPTAKE ; EXPORT ; CALIFORNIA ; WATER ; NUTRIENT ; CLIMATE ; RIVER ; FLOW ; AVAILABILITY
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/2XILL650/314690
作者单位Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
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Chen, Xiaoli,Tague, Christina L.,Melack, John M.,et al. Sensitivity of nitrate concentration-discharge patterns to soil nitrate distribution and drainage properties in the vertical dimension[J],2020,34(11):2477-2493.
APA Chen, Xiaoli,Tague, Christina L.,Melack, John M.,&Keller, Arturo A..(2020).Sensitivity of nitrate concentration-discharge patterns to soil nitrate distribution and drainage properties in the vertical dimension.HYDROLOGICAL PROCESSES,34(11),2477-2493.
MLA Chen, Xiaoli,et al."Sensitivity of nitrate concentration-discharge patterns to soil nitrate distribution and drainage properties in the vertical dimension".HYDROLOGICAL PROCESSES 34.11(2020):2477-2493.
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