干旱区生态环境知识资源中心(Arid): Effects of biocrusts and rainfall characteristics on runoff generation in the Mu Us Desert, northwest China

Arid

DOI	10.2166/nh.2019.046
	Effects of biocrusts and rainfall characteristics on runoff generation in the Mu Us Desert, northwest China
	Guan, Hongjie 1,2; Cao, Rongjiang 3
通讯作者	Guan, Hongjie
来源期刊	HYDROLOGY RESEARCH
ISSN	0029-1277
EISSN	2224-7955
出版年	2019
卷号	50 期号:5 页码:1410-1423
英文摘要	How the presence of biocrusts regulates runoff generation in the Mu Us Desert is not well known. Runoff experiments under natural and artificial rainfalls and numerical simulations were conducted in semiarid environments to evaluate the effects of biocrust type and rainfall characteristics on runoff. The experimental results showed that the water drop penetration time (WDPT) of the moss-dominated biocrusts was 68.7% higher than that of lichen-dominated biocrusts. Nevertheless, the saturated hydraulic conductivity (K-s) for moss-dominated biocrusts was 72.7% lower than that for the lichen-dominated biocrusts. Runoff yield for moss-dominated biocrusts was significantly higher than that for lichen-dominated biocrusts. Runoff yield was mainly explained by rainfall amount (or maximum 5-min rainfall intensity, I-5max) (P < 0.001) and WDPT (P = 0.001). The influences of biocrust type, rainfall intensity, and their interaction on runoff coefficient were significant at the probability level of 0.01. The results of numerical simulations concluded that surface runoff was generated for lichen- and moss-dominated biocrusts when rainfall intensity reached 73.5 and 49 mm h(-1), respectively. Runoff coefficient in the moss-covered soil increased obviously when rainfall intensity changed from 49 to 73.5 mm h(-1). The results suggest that runoff could be changed substantially under increasing trends in rainfall intensity in the Mu Us Desert.
英文关键词	HYDRUS-1D lichen moss rainfall amount rainfall intensity surface runoff
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000491432000015
WOS关键词	BIOLOGICAL SOIL CRUSTS ; WATER REPELLENCY ; SURFACE RUNOFF ; OVERLAND-FLOW ; FIELD DATA ; INFILTRATION ; VEGETATION ; DISTURBANCE ; PATTERNS ; BADLANDS
WOS类目	Water Resources
WOS研究方向	Water Resources
EI主题词	2019-10-01
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/2XILL650/310073
作者单位	1.Beijing Foresty Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China; 2.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China; 3.Xingyi Forestry Bur, Xingyi 562400, Peoples R China
推荐引用方式 GB/T 7714	Guan, Hongjie,Cao, Rongjiang. Effects of biocrusts and rainfall characteristics on runoff generation in the Mu Us Desert, northwest China[J]. 北京林业大学,2019,50(5):1410-1423.
APA	Guan, Hongjie,&Cao, Rongjiang.(2019).Effects of biocrusts and rainfall characteristics on runoff generation in the Mu Us Desert, northwest China.HYDROLOGY RESEARCH,50(5),1410-1423.
MLA	Guan, Hongjie,et al."Effects of biocrusts and rainfall characteristics on runoff generation in the Mu Us Desert, northwest China".HYDROLOGY RESEARCH 50.5(2019):1410-1423.