Storm runoff generation in headwater catchments on the Chinese Loess Plateau after long-term vegetation rehabilitation

doi:10.1016/j.scitotenv.2020.141375

IEECAS OpenIR

	Storm runoff generation in headwater catchments on the Chinese Loess Plateau after long-term vegetation rehabilitation
	Jin, Zhao 1,2; Guo, Li 3; Yu, Yunlong 1,4; Luo, Da 1,5; Fan, Bihang 3; Chu, Guangchen 1
通讯作者	Jin, Zhao(jinzhao@ieecas.cn) ; Guo, Li(guolistory@gmail.com)
	2020-12-15
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	748 页码:15
摘要	Storm runoff is important for maintaining surface water resources, while this function is significantly affected by land use and land cover changes, e.g., afforestation and reforestation. The Chinese Loess Plateau (CLP) has undergone large-scale vegetation rehabilitation, especially afforestation over the past 20 years. We hypothesize that afforestation has profoundly changed the amounts and mechanisms of storm runoff generation in headwater catchments on the CLP. To test this hypothesis, rainfall, soil moisture, and streamflow were monitored in a grass catchment and an adjacent forest catchment for two consecutive years. The objective of this study was to elucidate the varied mechanisms of storm runoff generation in these two contrasting revegetated catchments. Results showed that (1) average runoff coefficient in the grassland catchment (0.042) was approximately ten times higher than that in the forestland catchment (0.004), confirming the impact of catchment afforestation on the suppression of storm runoff generation. (2) Peak rainfall intensity was the first-order control of the runoff coefficient in the grassland catchment, but not in the forestland catchment. (3) Threshold values for antecedent soil moisture (similar to 18%) and the sum of antecedent soil moisture index and event precipitation (similar to 210 mm) were identified in the grassland catchment, above which storm runoff significantly increased. (4) Two extraordinary high runoff coefficient events were observed in the grassland catchment, one due to high peak rainfall intensity and strong surface runoff and the other due to high rainfall amount and high antecedent soil moisture. We conclude that long-term afforestation has changed the mechanisms and patterns of storm runoff generation, and different conditions of rainfall intensity, rainfall amount and antecedent soil moisture determined the hydrological connectivity between the upper hillslope and downhill gully in the catchment. This study deepens our understanding of the mechanisms and thresholds of storm runoff generation in headwater catchments on the CLP. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Catchment hydrology Rainfall partitioning Stormflow Threshold behaviors Vegetation restoration Water flux
DOI	10.1016/j.scitotenv.2020.141375
关键词[WOS]	SOIL-WATER CONTENT ; SUBSURFACE STORMFLOW ; HILLY AREA ; CHECK-DAMS ; LAND-USE ; RAINFALL ; RESTORATION ; RESPONSES ; COVER ; AFFORESTATION
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41790444] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Key Research and Development Program[2018YFC1504701]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Development Program
WOS类目	Environmental Sciences
WOS记录号	WOS:000581049800068
出版者	ELSEVIER
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15495
专题	中国科学院地球环境研究所
通讯作者	Jin, Zhao; Guo, Li
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China 4.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jin, Zhao,Guo, Li,Yu, Yunlong,et al. Storm runoff generation in headwater catchments on the Chinese Loess Plateau after long-term vegetation rehabilitation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,748:15.
APA	Jin, Zhao,Guo, Li,Yu, Yunlong,Luo, Da,Fan, Bihang,&Chu, Guangchen.(2020).Storm runoff generation in headwater catchments on the Chinese Loess Plateau after long-term vegetation rehabilitation.SCIENCE OF THE TOTAL ENVIRONMENT,748,15.
MLA	Jin, Zhao,et al."Storm runoff generation in headwater catchments on the Chinese Loess Plateau after long-term vegetation rehabilitation".SCIENCE OF THE TOTAL ENVIRONMENT 748(2020):15.