干旱区生态环境知识资源中心(Arid): Sensitivity of nitrate concentration-discharge patterns to soil nitrate distribution and drainage properties in the vertical dimension

Arid

DOI	10.1002/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
ISSN	0885-6087
EISSN	1099-1085
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
推荐引用方式 GB/T 7714	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.