干旱区生态环境知识资源中心(Arid): Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Arid

DOI	10.1038/s41598-019-39409-6
	Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale
	Liu, Jiakai 1; Engel, Bernard A.2; Wang, Yu 1; Zhang, Zhenming 1; Zhang, Mingxiang 1
通讯作者	Zhang, Zhenming ; Zhang, Mingxiang
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2019
卷号	9
英文摘要	Structural hydrological connectivity has been proposed to describe the geological structure of the landscape as well as to explain hydrological behaviors. Indices based on the topological or soil condition were developed to interpret their relationships. While previous studies mainly focused on well-instrumented catchments which are narrow in humidity or temperate zone, the hydrological responses to structural connectivity at the plot and hill slope scale as well as in arid or semi-arid climate conditions remain unclear. This study was conducted in the semi-arid mountainous region of northern China in Haihe Basin which is the source of water of about 350 million people. Experiments were conducted during the rainy season in 2012 and 2013 using four runoff plots. Two indices, flow path length (FL) based on topography and integral connectivity scale length (ICSL) based on soil moisture conditions, developed to represent hydrological connectivity structure and the runoff response to rainfall were analyzed. The results showed that the surface runoff coefficient was strongly and positively linearly correlated to FL, and the correlation between subsurface flow and ICSLs was quadratic. Plots with shorter FL required more rainfall to generate surface runoff. In the shallow soil layer, when the ICSLs are relatively low, the soil can store more water and less rainfall feeds subsurface runoff. Further analysis indicated that improved shallow soil connectivity conditions might enhance the water-holding capacity and lead to lower water yields for each event. This study demonstrated that hydrological structure connectivity could explain the mechanism of runoff generation in semi-arid areas while further experiments should be undertaken to find the threshold-like relationship between FL and surface runoff as well as the influence of plant cover on hydrological behaviors.
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000459399400001
WOS关键词	WATER STORAGE CAPACITY ; HYDROLOGICAL CONNECTIVITY ; SURFACE ; FOREST ; IMPACT ; FLOW ; HETEROGENEITY ; CONDUCTIVITY ; GENERATION ; STREAMFLOW
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218756
作者单位	1.Beijing Forestry Univ, Sch Nat Conservat, Beijing, CN, Peoples R China; 2.Purdue Univ, Agr & Biol Engn, W Laffayette, IN USA
推荐引用方式 GB/T 7714	Liu, Jiakai,Engel, Bernard A.,Wang, Yu,et al. Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale[J]. 北京林业大学,2019,9.
APA	Liu, Jiakai,Engel, Bernard A.,Wang, Yu,Zhang, Zhenming,&Zhang, Mingxiang.(2019).Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale.SCIENTIFIC REPORTS,9.
MLA	Liu, Jiakai,et al."Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale".SCIENTIFIC REPORTS 9(2019).