Understanding the rapidity of subsurface storm flow response from a fracture-oriented shallow vadose through a new perspective

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Understanding the rapidity of subsurface storm flow response from a fracture-oriented shallow vadose through a new perspective
	Peng, Zhao 1,3; Pei, Zhao 2,3; Chuan, Liang 1; Li Tianyang 1; Zhou Baojia 1
刊名	JOURNAL OF HYDROLOGY
	2017
卷号	544 页码:628-639
关键词	Subsurface flow Fast response mechanism Pressure wave Celerity Velocity Shallow vadose zone
ISSN号	0022-1694
通讯作者	Zhao Pei ; Liang Chuan
英文摘要	Velocity and celerity in hydrologic systems are controlled by different mechanisms. Efforts were made through joint sample collection and the use of hydrographs and tracers to understand the rapidity of the subsurface flow response to rainstorms on hourly time scales. Three deep subsurface flows during four natural rainstorm events were monitored. The results show that (1) deeper discharge was observed early in responding rainfall events and yielded a high hydrograph amplitude; (2) a ratio index, k, reflecting the dynamic change of the rainfall perturbation intensity in subsurface flow, might reveal inner causal relationships between the flow index and the tracer signal index. Most values of It were larger than 1 at the perturbation stage but approximated 1 at the no-perturbation stage; and (3) for statistical analysis of tracer signals in subsurface flows, the total standard deviation was 17.2, 11.9, 7.4 and 3.5 at perturbation stages and 4.4, 2.5, 1.1, and 0.95 at the non-perturbation stage for observed events. These events were 37 times higher in the former rather than the later, reflecting that the variation of tracer signals primarily occurred under rainfall perturbation. Thus, we affirmed that the dynamic features of rainfall have a key effect on rapid processes because, besides the gravity, mechanical waves originating from dynamic rainfall features are another driving factor for conversion between different types of rainfall mechanical energy. A conceptual model for pressure wave propagation was proposed, in which virtual subsurface flow processes in a heterogeneous vadose zone under rainfall are analogous to the water hammer phenomenon in complex conduit systems. Such an analogy can allow pressure in a shallow vadose to increase and decrease and directly influence the velocity and celerity of the flow reflecting a mechanism for rapid subsurface hydrologic response processes in the shallow vadose zone. (C) 2016 Published by Elsevier B.V.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
研究领域[WOS]	Engineering ; Geology ; Water Resources
关键词[WOS]	PREFERENTIAL FLOW ; CATCHMENT HYDROLOGY ; WATER-FLOW ; HILLSLOPE ; TRANSPORT ; HYDROGRAPH ; MACROPORES ; RUNOFF ; MODEL ; ZONE
收录类别	SCI
语种	英语
WOS记录号	WOS:000392767000053
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18453]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China 2.Shangluo Univ, Coll Urban Rural Planning & Architectural Engn, Shangluo 726000, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Peng, Zhao,Pei, Zhao,Chuan, Liang,et al. Understanding the rapidity of subsurface storm flow response from a fracture-oriented shallow vadose through a new perspective[J]. JOURNAL OF HYDROLOGY,2017,544:628-639.
APA	Peng, Zhao,Pei, Zhao,Chuan, Liang,Li Tianyang,&Zhou Baojia.(2017).Understanding the rapidity of subsurface storm flow response from a fracture-oriented shallow vadose through a new perspective.JOURNAL OF HYDROLOGY,544,628-639.
MLA	Peng, Zhao,et al."Understanding the rapidity of subsurface storm flow response from a fracture-oriented shallow vadose through a new perspective".JOURNAL OF HYDROLOGY 544(2017):628-639.