干旱区生态环境知识资源中心(Arid): Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China

Arid

DOI	10.3390/w12020594
	Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China
	Li, Guijing 1,2; Rubinato, Matteo 3,4; Wan, Long 1,2; Wu, Bin 2; Luo, Jiufu 1,2; Fang, Jianmei 2; Zhou, Jinxing 1,2
通讯作者	Zhou, Jinxing
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:2
英文摘要	Karst regions are widely distributed in Southwest China and due to the complexity of their geologic structure, it is very challenging to collect data useful to provide a better understanding of surface, underground and fissure flows, needed to calibrate and validate numerical models. Without characterizing these features, it is very problematic to fully establish rainfall-runoff processes associated with soil loss in karst landscapes. Water infiltrated rapidly to the underground in rocky desertification areas. To fill this gap, this experimental work was completed to preliminarily determine the output characteristics of subsurface and underground fissure flows and their relationships with rainfall intensities (30 mm h(-1), 60 mm h(-1) and 90 mm h(-1)) and bedrock degrees (30%, 40% and 50%), as well as the role of underground fissure flow in the near-surface rainfall-runoff process. Results indicated that under light rainfall conditions (30 mm h(-1)), the hydrological processes observed were typical of Dunne overland flows; however, under moderate (30 mm h(-1)) and high rainfall conditions (90 mm h(-1)), hydrological processes were typical of Horton overland flows. Furthermore, results confirmed that the generation of underground runoff for moderate rocky desertification (MRD) and severe rocky desertification (SRD) happened 18.18% and 45.45% later than the timing recorded for the light rocky desertification (LRD) scenario. Additionally, results established that the maximum rate of underground runoff increased with the increase of bedrock degrees and the amount of cumulative underground runoff measured under different rocky desertification was SRD > MRD > LRD. In terms of flow characterization, for the LRD configuration under light rainfall intensity the underground runoff was mainly associated with soil water, which was accounting for about 85%-95%. However, under moderate and high rainfall intensities, the underground flow was mainly generated from fissure flow.
英文关键词	rock-soil contact area fissure flow karst rocky desertification runoff rainfall simulation
类型	Article
语种	英语
国家	Peoples R China ; England
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000519846500285
WOS关键词	SOIL-EROSION RATES ; CLIMATOLOGICAL GRADIENT ; BARE SLOPES ; LAND-USE ; RUNOFF ; FLOW ; GEOLOGY ; IMPACT ; AREA
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
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/2XILL650/315731
作者单位	1.Beijing Forestry Univ, Sch Soil & Water Conservat, Jianshui Res Stn, Beijing 100083, Peoples R China; 2.Beijing Forestry Univ, Key Lab State Forestry & Grassland Adm Soil & Wat, Beijing 100083, Peoples R China; 3.Coventry Univ, Sch Energy Construct & Environm, Coventry CV1 5FB, W Midlands, England; 4.Coventry Univ, Ctr Agroecol Water & Resilience, Coventry CV1 5FB, W Midlands, England
推荐引用方式 GB/T 7714	Li, Guijing,Rubinato, Matteo,Wan, Long,et al. Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China[J]. 北京林业大学,2020,12(2).
APA	Li, Guijing.,Rubinato, Matteo.,Wan, Long.,Wu, Bin.,Luo, Jiufu.,...&Zhou, Jinxing.(2020).Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China.WATER,12(2).
MLA	Li, Guijing,et al."Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China".WATER 12.2(2020).