干旱区生态环境知识资源中心(Arid): Analysis of long-term gully dynamics in different agro-ecology settings

Arid

DOI	10.1016/j.catena.2019.04.013
	Analysis of long-term gully dynamics in different agro-ecology settings
	Yibeltal, Mesenbet 1,2; Tsunekawa, Atsushi 3; Haregeweyn, Nigussie 4; Adgo, Enyew 5; Meshesha, Derege Tsegaye 5; Aklog, Dagnachew 6; Masunaga, Tsugiyuki 7; Tsubo, Mitsuru 3; Billi, Paolo 4; Vanmaercke, Matthias 4,8; Ebabu, Kindiye 1,5; Dessie, Mekete 2; Sultan, Dagnenet 2; Liyew, Mulatu 1,2
通讯作者	Yibeltal, Mesenbet
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	179 页码:160-174
英文摘要	Gully erosion is one of the main causes of land degradation, particularly in the drought-prone regions of Ethiopia. This study assessed spatio-temporal changes of gully length and density in watershed pairs in Guder, Aba Gerima, and Dibatie sites, which are representative highland, midland, and lowland agro-ecologies in the Upper Blue Nile basin of Ethiopia. Aerial photographs (1957, 1982) and very high resolution satellite images (QuickBird, IKONOS, Worldview-2, SPOT-7, and Pleiades) of the six watersheds, along with field survey results, were used in the analyses. The aerial photographs were scanned and orthorectified using ENVI 4.3 image analysis software, and gullies were mapped by visual image interpretation in the ArcGIS environment. Rates of increase in gully length in Guder (36.9 m yr(-1)) and Aba Gerima (33.6 m yr(-1)) were almost double the rate in Dibatie (17.8 m yr(-1)) from 1957 to 2016 or 2017, and over the same period, gully density similarly increased by 5.9, 5.4, and 3.7 m ha(-1) in Guder, Aba Gerima, and Dibatie, respectively. The higher rates in Guder and Aba Gerima reflect the long history of cultivation and human settlement in those sites, whereas agricultural activity became widespread in Dibatie only after implementation of the national resettlement program in the 1980s. Moreover, although gully density tended to increase over time in all six watersheds, in the three watersheds (one in each paired watershed) where soil and water conservation measures had been introduced, the rate of increase was lower than in those where no such measures were implemented. In addition, gully distribution was linked to land use and landscape position; gully density was higher in cultivated areas and where slope gradients were gentle. The results of this study indicate that careful site-specific identification of factors controlling gully initiation and development is crucial so that appropriate management strategies can be developed for these three sites and for other areas with similar agro-ecologies in the Upper Blue Nile basin.
英文关键词	Drought-prone Gully erosion Gully density Satellite image Aerial photograph Agro-ecology Ethiopia
类型	Article
语种	英语
国家	Japan ; Ethiopia ; Belgium
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000468716800016
WOS关键词	BLUE NILE BASIN ; LAND-USE CHANGE ; SOIL-EROSION ; ETHIOPIAN HIGHLANDS ; NORTHERN ETHIOPIA ; SEDIMENT YIELD ; HEAD DEVELOPMENT ; EASTERN CAPE ; CATCHMENT ; DESERTIFICATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214843
作者单位	1.Tottori Univ, United Grad Sch Agr Sci, 1390 Hamasaka, Tottori 6808553, Japan; 2.Bahir Dar Univ, Bahir Dar Inst Technol, Fac Civil & Water Resource Engn, Bahir Dar, Ethiopia; 3.Tottori Univ, Arid Land Res Ctr, 1390 Hamasaka, Tottori 6808553, Japan; 4.Tottori Univ, Int Platform Dryland Res & Educ, Tottori, Japan; 5.Bahir Dar Univ, Coll Agr & Environm Sci, Bahir Dar, Ethiopia; 6.Tottori Univ, Ctr Int Affairs, Tottori, Japan; 7.Shimane Univ, Fac Life & Environm Sci, Matsue, Shimane, Japan; 8.Univ Liege, Dept Geog, Liege, Belgium
推荐引用方式 GB/T 7714	Yibeltal, Mesenbet,Tsunekawa, Atsushi,Haregeweyn, Nigussie,et al. Analysis of long-term gully dynamics in different agro-ecology settings[J],2019,179:160-174.
APA	Yibeltal, Mesenbet.,Tsunekawa, Atsushi.,Haregeweyn, Nigussie.,Adgo, Enyew.,Meshesha, Derege Tsegaye.,...&Liyew, Mulatu.(2019).Analysis of long-term gully dynamics in different agro-ecology settings.CATENA,179,160-174.
MLA	Yibeltal, Mesenbet,et al."Analysis of long-term gully dynamics in different agro-ecology settings".CATENA 179(2019):160-174.