GSTDTAP  > 资源环境科学
DOI10.1029/2019WR025501
Spatial Heterogeneity Enables Higher Root Water Uptake in Dry Soil but Protracts Water Stress After Transpiration Decline: A Numerical Study
von Jeetze, Patrick Jose1,2; Zarebanadkouki, Mohsen1; Carminati, Andrea1
2020
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2020
卷号56期号:1
文章类型Article
语种英语
国家Germany
英文摘要

A common assumption in models of water flow from soil to root is that the soil can be described in terms of its representative or effective behavior. Microscale heterogeneity and structure are thereby replaced by effective descriptions, and their role in flow processes at the root-soil interface is neglected. Here the aim was to explore whether a detailed characterization of the microscale heterogeneity at the scale of a single root impacts the relation between flow rate and pressure gradient. Numerical simulations of water flow toward a root surface were carried out in a two-dimensional domain with a randomized configuration of spatially variable unsaturated hydraulic conductivities and varying boundary conditions, that is, increasing and decreasing root water uptake rates. By employing Matheron's method, the soil hydraulic properties were varied, while the effective hydraulic conductivity (corresponding to the geometric mean) remained unchanged. Results show that domains with a uniform conductivity could not capture important features of water flow and pressure distribution in spatially variable domains. Specifically, increasing heterogeneity at the root-soil interface allowed to sustain higher root water uptake rates but caused a slower recovery in xylem suction after transpiration ceased. The significance of this is that, under critical conditions, when pressure gradients and flow rates are high, microscale heterogeneity may become an important determinant and should not be neglected in adequate descriptions of water flow from soil to root in dry soil.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000520132500028
WOS关键词TRANSIENT UNSATURATED FLOW ; STEADY-STATE FLOW ; HYDRAULIC CONDUCTIVITY ; PREFERENTIAL FLOW ; SOLUTE TRANSPORT ; PLANT-ROOTS ; NONEQUILIBRIUM ; HYSTERESIS ; RESISTANCE ; MECHANISM
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/280460
专题资源环境科学
作者单位1.Univ Bayreuth, Chair Soil Phys, Bayreuth, Germany;
2.Leibniz Assoc, Potsdam Inst Climate Impact Res PIK, Potsdam, Germany
推荐引用方式
GB/T 7714
von Jeetze, Patrick Jose,Zarebanadkouki, Mohsen,Carminati, Andrea. Spatial Heterogeneity Enables Higher Root Water Uptake in Dry Soil but Protracts Water Stress After Transpiration Decline: A Numerical Study[J]. WATER RESOURCES RESEARCH,2020,56(1).
APA von Jeetze, Patrick Jose,Zarebanadkouki, Mohsen,&Carminati, Andrea.(2020).Spatial Heterogeneity Enables Higher Root Water Uptake in Dry Soil but Protracts Water Stress After Transpiration Decline: A Numerical Study.WATER RESOURCES RESEARCH,56(1).
MLA von Jeetze, Patrick Jose,et al."Spatial Heterogeneity Enables Higher Root Water Uptake in Dry Soil but Protracts Water Stress After Transpiration Decline: A Numerical Study".WATER RESOURCES RESEARCH 56.1(2020).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[von Jeetze, Patrick Jose]的文章
[Zarebanadkouki, Mohsen]的文章
[Carminati, Andrea]的文章
百度学术
百度学术中相似的文章
[von Jeetze, Patrick Jose]的文章
[Zarebanadkouki, Mohsen]的文章
[Carminati, Andrea]的文章
必应学术
必应学术中相似的文章
[von Jeetze, Patrick Jose]的文章
[Zarebanadkouki, Mohsen]的文章
[Carminati, Andrea]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。