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	IMPACT OF LAND USE AND LAND COVER CHANGE ON ENVIRONMENTAL DEGRADATION IN LAKE QINGHAI WATERSHED, NORTHEAST QINGHAI-TIBET PLATEAU
	Li, X. -Y.1,2; Ma, Y-J.2; Xu, H. -Y.2; Wang, J. -H.3; Zhang, D. -S.1
刊名	LAND DEGRADATION & DEVELOPMENT
	2009
卷号	20期号:1页码:69-83
关键词	land use/cover change Lake Qinghai lake level grassland PR China
ISSN号	1085-3278
DOI	10.1002/ldr.885
通讯作者	Li, X. -Y.(xyli@ires.cn)
英文摘要	Lake Qinghai, the largest saline lake in China, covers 4234 km(2) (2007) with a catchment area of 29 660 km(2) on the northeastern margin of the Qinghai-Tibet Plateau. The ecosystem of the lake is extremely vulnerable and sensitive to global climate change and human interference. However, little information is available on land use/cover change (LUCC) in Lake Qinghai watershed. Using a geographical information system (GIS) and remote sensing (RS), this study analysed land use and land cover change pattern in Lake Qinghai watershed between 1977 and 2004 and discussed major environmental issues in this area. LUCC analysis indicated that grassland (63 per cent) and water body (18 per cent) dominated in the watershed and the magnitude of the land use and land cover change was generally low; the percentage of the change of various land types relative to the total area was less than I per cent. From 1977 to 2004, cropland, sandy land, bare rock, salinized land, swampland and built-up areas increased by 0.43, 0.35, 0.24, 0.06, 0.03 and 0.03 per cent of the total area, respectively; in contrast, water body, grassland and woodland decreased by 0.99, 0.22 and 0.05 per cent, respectively. Moreover, the area of LUCC tended to expand from places around the lake to the upper reaches of the watershed during the last three decades. The LUCC transition pattern was: woodland converted to grassland, grassland converted to cropland and water body converted to sandy land. Lake level decline and grassland degradation are major ecological and environmental problems in Lake Qinghai watershed. The level and area of the lake decreased at the rate of 6.7 cm a(-1) and 6.4 km(2) a(-1), respectively, between 1959 and 2007, resulting in sandy land expansion and water quality deterioration. Lake level decline and area shrinkage was mainly attributed to climate change, but grassland degradation was mainly resulted from anthropogenic activities (increasing population, overgrazing and policy). Copyright (C) 2008 John Wiley & Sons, Ltd.
收录类别	SCI
WOS关键词	WEST CHINA ; TM
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000263453400007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556235
专题	寒区旱区环境与工程研究所
通讯作者	Li, X. -Y.
作者单位	1.Beijing Normal Univ, Coll Resources Sci & Technol, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 2.Beijing Normal Univ, Inst Land Resources, Coll Resources Sci & Technol, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, X. -Y.,Ma, Y-J.,Xu, H. -Y.,et al. IMPACT OF LAND USE AND LAND COVER CHANGE ON ENVIRONMENTAL DEGRADATION IN LAKE QINGHAI WATERSHED, NORTHEAST QINGHAI-TIBET PLATEAU[J]. LAND DEGRADATION & DEVELOPMENT,2009,20(1):69-83.
APA	Li, X. -Y.,Ma, Y-J.,Xu, H. -Y.,Wang, J. -H.,&Zhang, D. -S..(2009).IMPACT OF LAND USE AND LAND COVER CHANGE ON ENVIRONMENTAL DEGRADATION IN LAKE QINGHAI WATERSHED, NORTHEAST QINGHAI-TIBET PLATEAU.LAND DEGRADATION & DEVELOPMENT,20(1),69-83.
MLA	Li, X. -Y.,et al."IMPACT OF LAND USE AND LAND COVER CHANGE ON ENVIRONMENTAL DEGRADATION IN LAKE QINGHAI WATERSHED, NORTHEAST QINGHAI-TIBET PLATEAU".LAND DEGRADATION & DEVELOPMENT 20.1(2009):69-83.

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