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	Landscape changes of the Ejin Delta in the Heihe River Basin in Northwest China from 1930 to 2010
	Nian, Yanyun1,2,3; Li, Xin2,4; Zhou, Jian2
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	2017
卷号	38期号:2页码:537-557
ISSN号	0143-1161
DOI	10.1080/01431161.2016.1268732
通讯作者	Nian, Yanyun(yynian@lzu.edu.cn)
英文摘要	The Heihe River Basin is located in the arid and semi-arid region of Northwest China; during the past 80 years, this basin has experienced water resource competition between irrigation agriculture and ecological demand in its middle and lower reaches, respectively. The land cover of the Ejin Delta in the lower reaches of the Heihe River Basin was interpreted and analysed for four different periods using a map created by Dr Sven Hedin in the 1930s, Corona satellite images taken in 1961, and Landsat Thematic Mapper (TM) images taken in 2000 and 2010. Overall, the results show that (1) the coarse resolution of the 1930s map increased the uncertainty of analysis in the study area and (2) the river area in the Ejin Delta decreased by 91.0% from the 1930s to 2000. In addition, two major terminal lakes, Gaxun Nuur Lake and Sogo Nuur Lake, dried up in 1961 and 1992, respectively, and the area of Populus euphratica decreased by 76.1% from the 1930s to 2000. Most reeds were overtaken by shrubs between the 1930s and 1961, which caused the area of reeds to decrease from 3481 to 1332 km(2) and the area of shrubs to increase from 805 to 2795 km(2). From the 1930s to 2000, the desert and alkaline land areas increased by 42.2% and 52.4%, respectively. (3) After the water transfer project was implemented in 2000, the area of Sogo Nuur Lake recovered to 40.58 km(2) by 2010. The areas of Populus euphratica, shrubland, and reedland showed a recovering trend, with increases of 4.5%, 6.5%, and 43.5%, respectively, by 2010. The desert and alkaline land areas decreased by 4.2% and 15.2%, respectively, by 2010. The area of cultivated land increased from 25 km(2) in 1961 to 85 km(2) in 2000 and rapidly approached 160 km(2) in 2010. These changes over time indicated that the ecological habitat in the Ejin Delta deteriorated between the 1930s and 2000. However, the water transfer project effectively changed the degradation trend.
收录类别	SCI
WOS关键词	LAND-USE CHANGES ; WEST CHINA ; ACCURACY ASSESSMENT ; VEGETATION COVER ; WATER-RESOURCES ; TIBETAN PLATEAU ; GROUNDWATER ; CHALLENGES ; EVOLUTION ; IMPACT
WOS研究方向	Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000390607700010
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557493
专题	寒区旱区环境与工程研究所
通讯作者	Nian, Yanyun
作者单位	1.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Remote Sensing Gansu Prov, Lanzhou, Peoples R China 3.Lanzhou Univ, Res Ctr Silk Rd Econ Belt, Lanzhou, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Nian, Yanyun,Li, Xin,Zhou, Jian. Landscape changes of the Ejin Delta in the Heihe River Basin in Northwest China from 1930 to 2010[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2017,38(2):537-557.
APA	Nian, Yanyun,Li, Xin,&Zhou, Jian.(2017).Landscape changes of the Ejin Delta in the Heihe River Basin in Northwest China from 1930 to 2010.INTERNATIONAL JOURNAL OF REMOTE SENSING,38(2),537-557.
MLA	Nian, Yanyun,et al."Landscape changes of the Ejin Delta in the Heihe River Basin in Northwest China from 1930 to 2010".INTERNATIONAL JOURNAL OF REMOTE SENSING 38.2(2017):537-557.

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