气候变化领域集成服务门户(CCPortal): Using storage selection functions to assess mixing patterns and water ages of soil water, evaporation and transpiration

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DOI	10.1016/j.advwatres.2020.103586
	Using storage selection functions to assess mixing patterns and water ages of soil water, evaporation and transpiration
	Smith A.A.; Tetzlaff D.; Soulsby C.
发表日期	2020
ISSN	0309-1708
卷号	141
英文摘要	Understanding flow and transport processes in the critical zone relies heavily on characterising the interactions between evaporation and vegetation uptake of soil water; however, the magnitude, sources, and ages of these water fluxes are rarely well-constrained. We adapted the StorAge Selection (SAS) function framework to estimate the residence time of stored water, and transit times of eco-hydrologic fluxes, at multiple soil depths in typical soil-vegetation units in the humid, energy-limited Scottish Highlands. Modelling water and stable isotope fluxes within the soil-vegetation units indicated that rapid movement of young water through the soils occurred at both sites, creating relatively stable water residence times in the soils with depth and time. Estimation of the evaporation profile had limited temporal variability with a high preference for near-surface water (0 – 5 cm soil depth, long-term mean age: 50 – 65 days) due to relatively frequent precipitation. Root uptake profiles revealed higher temporal variability, favouring deeper water (5 – 15 cm) during drier periods and near-surface (0 – 5 cm) during wet periods (long-term mean age: 6 – 15 days older than evaporation). The model structure provides a tool to help constrain water storage–flux–age interactions in the upper part of the critical zone and understand how soil–vegetation systems influence groundwater recharge and catchment-scale hydrology. © 2020 Elsevier Ltd
关键词	Catchments Soil moisture Surface waters Transpiration Vegetation Catchment scale Flow and transport Ground water recharge Selection function Soil-vegetation Stable isotopes Temporal variability Vegetation systems Recharging (underground waters)evaporation residence time soil depth soil water soil-vegetation interaction temporal variation transpiration water flux water storage
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131786
推荐引用方式 GB/T 7714	Smith A.A.,Tetzlaff D.,Soulsby C.. Using storage selection functions to assess mixing patterns and water ages of soil water, evaporation and transpiration[J]. Advances in Water Resources,2020,141.
APA	Smith A.A.,Tetzlaff D.,&Soulsby C..(2020).Using storage selection functions to assess mixing patterns and water ages of soil water, evaporation and transpiration.,141.
MLA	Smith A.A.,et al."Using storage selection functions to assess mixing patterns and water ages of soil water, evaporation and transpiration".141(2020).