Using high-resolution aerial images to study gully development at the regional scale in southern China

doi:10.1016/j.iswcr.2020.03.004

	Using high-resolution aerial images to study gully development at the regional scale in southern China
	Liu, Honghu 1,2; Hoermann, Georg 3; Qi, Bingyu 2; Yue, Qiuxing 2
刊名	INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
	2020-06-01
卷号	8 期号:2 页码:173-184
关键词	Digital elevation model Slope gradient Exposed lands Upstream contributing area
ISSN号	2095-6339
DOI	10.1016/j.iswcr.2020.03.004
通讯作者	Liu, Honghu(liuhh@mail.crsri.cn)
英文摘要	There are 239,100 gullies in southern China, which cause the degradation of ecological system. However, studies on gully development at the regional scale is relatively lack. The purpose of this study is to analyze the regional gully dynamics and explore how land use and topographic factors affect gully development. Input data consists of land use maps derived from high-resolution images from 2004 to 2014, and topography maps from a digital elevation model with a pixel size of 8 m x 8 m in two 25-km(2) study sites of Anxi (AX) and Xingning county (XN). The following results were obtained: (1) AX gullies decreased from 2006 to 2014 while XN first increased from 2004 to 2009, and then decreased from 2009 to 2014. Both AX and XN gully area in percentage of the total area ranged from 1% to 3%, which was higher than the average 0.25% of the whole southern China by the artificial survey in 2005. (2) Most of AX and XN gullies occurred along the ridgeline and had the close relationships with the upstream contributing area and slope gradient. (3) New gullies developed on the exposed land and forestland. The lost gullies were converted into forestland and grassland. In fact, most of these gullies were only covered by vegetation, not real disappearance. These results proved that gully decreased, but construction of roads and buildings intensified gully development. Consequently, these findings reveal that vegetation protection and ecological restoration should be adopted in southern China. (c) 2020 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. Production and Hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	National Natural Science Foundation of China[41301297] ; One Hundred Person Project of Shannxi Province
WOS关键词	RETREAT RATES ; LOESS PLATEAU ; SOIL-EROSION ; AREAS ; 3D
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	KEAI PUBLISHING LTD
WOS记录号	WOS:000540327800008
资助机构	National Natural Science Foundation of China ; One Hundred Person Project of Shannxi Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162234]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Honghu
作者单位	1.Changjiang Water Resource Commiss, Changjiang River Sci Res Inst, 23 Huangpuda St, Wuhan 430010, Hubei, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China 3.Univ Kiel, Inst Nat Resource Conservat, Dept Hydrol & Water Resources Management, Olshausenstr 75, D-24098 Kiel, Germany
推荐引用方式 GB/T 7714	Liu, Honghu,Hoermann, Georg,Qi, Bingyu,et al. Using high-resolution aerial images to study gully development at the regional scale in southern China[J]. INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,2020,8(2):173-184.
APA	Liu, Honghu,Hoermann, Georg,Qi, Bingyu,&Yue, Qiuxing.(2020).Using high-resolution aerial images to study gully development at the regional scale in southern China.INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,8(2),173-184.
MLA	Liu, Honghu,et al."Using high-resolution aerial images to study gully development at the regional scale in southern China".INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH 8.2(2020):173-184.