干旱区生态环境知识资源中心(Arid): Dynamic rainfall-partitioning relationships among throughfall, stemflow, and interception loss by Caragana intermedia

Arid

DOI	10.1016/j.jhydrol.2019.04.083
	Dynamic rainfall-partitioning relationships among throughfall, stemflow, and interception loss by Caragana intermedia
	Yang, Xin-guo; Chen, Lin; Wang, Lei; Wang, Xing; Gu, Jun-long; Qu, Wen-jie; Song, Nai-ping
通讯作者	Song, Nai-ping
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	574 页码:980-989
英文摘要	Grassland restored by re-vegetated shrub is an important ecosystem in desert steppe of Northwest China. Yet little is understood about the underlying eco-hydrological mechanisms for maintaining the stability of the re vegetated ecosystem. Based on the conversion relationships among throughfall, interception loss, and stemflow, we developed a method to analyze the dynamic responses of rainfall partitioning by vegetation canopies to precipitation variation, and the driving mechanisms for stemflow of two morphological distinct shrubs (unhealthy and healthy C. intermedia) during the 21 rainfall events (0-15 mm) in the period from 2016 to 2017. We found that the stemflow increased in a low-value stepwise manner with the increasing rainfall depth and eventually became scattered. Therefore, the response of stemflow to gross precipitation was divided into three stages by rainfall depth: initiation (0-2 mm), transition (2-6 mm), and scattered (6-15 mm). A significantly negative linear relationship was observed between throughfall and interception loss, while the relationships of interception loss- stemflow and throughfall- stemflow exhibited a more complex nonlinear way with relatively weaker correlations. Rainfall depth and canopy area were two main factors driving the partitioning relationships. Non-precipitation meteorological factors were dominant in the 0-2 mm rainfall events, while rainfall factors were determinant in the 6-15 mm events. Morphological factors exerted more influences on the partitioning relationships for healthy C. intermedia. Overall, the conversion between throughfall and interception loss was the majority of dynamic rainfall partitioning; therefore, low and unstable stemflow was usually inevitable. The results indicate that the precipitation threshold for stemflow generation should be a range value instead of a specific value, and the rebuilt analysis roadmaps are essential for investigating stemflow using the thorough conversion relationships and the 'stepped' approach.
英文关键词	Caragana intermedia Throughfall Stemflow Interception loss Dynamic rainfall-partitioning relationship Desert steppe
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000476962800076
WOS关键词	2 XEROPHYTIC SHRUBS ; EVENT CHARACTERISTICS ; SPATIAL VARIABILITY ; DECIDUOUS FOREST ; PINE PLANTATION ; SOIL-WATER ; CANOPY ; DESERT ; ENHANCEMENT ; FLUXES
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217158
作者单位	(1)Ningxia Univ, Northwest Natl Key Lab Breeding Base Land Degrada, Ningxia 750021, Peoples R China;(2)Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst, Minist Educ, Ningxia 750021, Peoples R China;(3)Ningxia Univ, Joint Res Ctr Ecol & Morphol Resources Dev Wester, Ningxia 750021, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xin-guo,Chen, Lin,Wang, Lei,et al. Dynamic rainfall-partitioning relationships among throughfall, stemflow, and interception loss by Caragana intermedia[J],2019,574:980-989.
APA	Yang, Xin-guo.,Chen, Lin.,Wang, Lei.,Wang, Xing.,Gu, Jun-long.,...&Song, Nai-ping.(2019).Dynamic rainfall-partitioning relationships among throughfall, stemflow, and interception loss by Caragana intermedia.JOURNAL OF HYDROLOGY,574,980-989.
MLA	Yang, Xin-guo,et al."Dynamic rainfall-partitioning relationships among throughfall, stemflow, and interception loss by Caragana intermedia".JOURNAL OF HYDROLOGY 574(2019):980-989.