Modeling rainfall interception loss by two xerophytic shrubs in the Loess Plateau

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Modeling rainfall interception loss by two xerophytic shrubs in the Loess Plateau
	Zhang, Yu; Li, Xiao-Yan; Li, Wei; Wu, Xiu-Chen; Shi, Fang-Zhong; Fang, Wei-Wei; Pei, Ting-Ting
刊名	HYDROLOGICAL PROCESSES
	2017-05-15
卷号	31 期号:10 页码:1926-1937
关键词	Canopy Storage Capacity Canopy Structure Interception Loss Loess Plateau Modeling Stemflow Shrubs Throughfall
英文摘要	Rainfall interception loss plays an important role in ecohydrological processes in dryland shrub ecosystems, but its drivers still remain poorly understood. In this study, a statistical model was developed to simulate interception loss based on the mass balance measurements arising from the partitioning of rainfall in 2 dominant xerophytic shrub (Hippophae rhamnoides and Spiraea pubescens) communities in the Loess Plateau. We measured throughfall and stemflow in the field under natural rainfall, calculated the canopy storage capacity in the laboratory, and identified key factors controlling these components for the 2 shrubs. We quantified and scaled up the stemflow and the canopy storage capacity measurements from the branches and/or leaves to stand level. The average interception loss, throughfall, and stemflow fluxes account for 24.9%, 72.2%, and 2.9% of the gross rainfall for H.rhamnoides, and 19.2%, 70.7%, and 10.1% for S.pubescens, respectively. Throughfall increased with increasing rainfall for both shrubs; however, it was only correlated with the leaf area index for S.pubescens. For stemflow measured from individual branches, we found that the rainfall amount and basal diameter are the best predictors for H.rhamnoides, whereas rainfall amount and branch biomass appear to be the best predictors for S.pubescens. At the stand level, stemflow production is affected by the rainfall amount for H.rhamnoides, and it is affected by both the rainfall amount and the leaf area index for S.pubescens. The canopy storage capacity of H.rhamnoides (1.07-1.28mm) was larger than S.pubescens (0.88-1.07mm), and it is mainly determined by the branches and stems of H.rhamnoides and the leaves of S.pubescens. The differences in interception loss between the 2 shrub stands are mainly attributed to different canopy structures that induced differences in stemflow production and canopy storage. We evaluated the effects of canopy structure on rainfall interception loss, and our developed model provides a better understanding of the effects of the canopy structure on the water cycles in dryland shrub ecosystems.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39526]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Yu,Li, Xiao-Yan,Li, Wei,et al. Modeling rainfall interception loss by two xerophytic shrubs in the Loess Plateau[J]. HYDROLOGICAL PROCESSES,2017,31(10):1926-1937.
APA	Zhang, Yu.,Li, Xiao-Yan.,Li, Wei.,Wu, Xiu-Chen.,Shi, Fang-Zhong.,...&Pei, Ting-Ting.(2017).Modeling rainfall interception loss by two xerophytic shrubs in the Loess Plateau.HYDROLOGICAL PROCESSES,31(10),1926-1937.
MLA	Zhang, Yu,et al."Modeling rainfall interception loss by two xerophytic shrubs in the Loess Plateau".HYDROLOGICAL PROCESSES 31.10(2017):1926-1937.