干旱区生态环境知识资源中心(Arid): Sediment connectivity of small watershed affected by gully development and vegetation restoration on the loess plateau

Arid

DOI	10.1016/j.geoderma.2021.115663
	Sediment connectivity of small watershed affected by gully development and vegetation restoration on the loess plateau
	Wang, Chengshu; Zhang, Guanghui; Zhu, Pingzong; Wang, Ziguan; Xing, Shukun
通讯作者	Zhang, GH
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2022
卷号	410
英文摘要	Sediment connectivity can reflect the linkage between sediment source and sink, and identify the hotspot of soil conservation in watersheds. Potential effects of gully development and vegetation restoration on sediment connectivity are not fully understood. This study was performed to quantify the temporal changes in sediment connectivity reflected by the index of connectivity (IC) triggered by the coupling effect of gully development and vegetation restoration in a representative small watershed in the Loess Plateau. Google maps and Landsat images were used to determine gully characteristics and vegetation coverage. Based on the source-sink landscape index, weights of different land use types were computed using the K and C factors of the Universal Soil Loess Equation to calculate the IC. Partial least squares regression was used to quantify the contribution of gully development and vegetation restoration to the IC. The results showed that IC decreased significantly from-1.27 in 2000 to-8.15 in 2020 due to rapid vegetation restoration. Sediment connectivity increased with slope gradient but decreased with vegetation coverage. Compared with grassland, sediment connectivity decreased by 0.35-2.86 for cropland and 1.29-3.56 for forestland from 2000 to 2020. Moreover, the length, width, circumference, and area of gullies increased by at least 73% from 2000 to 2010, and the rate of increase declined greatly with the effective implementation of vegetation restoration. With the increase in slope gradient, gully development became more intense, and the IC increased. The gully length, width, circumference and area, and IC of shady and semi-shady slope aspects were 27.25%, 23.29%, 26.76% and 61.46%, and 5.8%-18.6% less than that of sunny and semi-sunny slope aspects. Vegetation restoration inhibited sediment connectivity, whereas gully develop-ment promoted sediment connectivity. Overall, the decrease in sediment connectivity triggered by vegetation restoration was much greater than the increase induced by gully development. The results of this study help understand the change in sediment connectivity over time under the comprehensive impact of vegetation restoration and gully development at small watershed scales in semi-arid regions.
英文关键词	Soil erosion IC Grain for Green Project Gully Land use and land cover
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000788786000006
WOS关键词	LAND-USE CHANGE ; SOIL-EROSION ; ECOLOGICAL RESTORATION ; HILLSLOPE EROSION ; SMALL CATCHMENT ; CLIMATE-CHANGE ; LANDSCAPE ; IMPACTS ; COVER ; YIELD
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392910
推荐引用方式 GB/T 7714	Wang, Chengshu,Zhang, Guanghui,Zhu, Pingzong,et al. Sediment connectivity of small watershed affected by gully development and vegetation restoration on the loess plateau[J],2022,410.
APA	Wang, Chengshu,Zhang, Guanghui,Zhu, Pingzong,Wang, Ziguan,&Xing, Shukun.(2022).Sediment connectivity of small watershed affected by gully development and vegetation restoration on the loess plateau.GEODERMA,410.
MLA	Wang, Chengshu,et al."Sediment connectivity of small watershed affected by gully development and vegetation restoration on the loess plateau".GEODERMA 410(2022).