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学科主题: Environmental Sciences
题名: Land-cover changes in an urban lake watershed in a mega-city, Central China
作者: Li, Yan; Zhao, Shuqing; Zhao, Kun; Xie, Ping; Fang, Jingyun
通讯作者: Fang, JY, Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China
关键词: Central China ; Donghu Lake ; land cover change ; landscape characteristics ; remote sensing ; urbanization ; urban lake watershed
刊名: ENVIRONMENTAL MONITORING AND ASSESSMENT
发表日期: 2006-04-01
DOI: 10.1007/s10661-006-6559-z
卷: 115, 期:1-3, 页:349-359
收录类别: SCI
文章类型: Article
部门归属: Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China; Peking Univ, Minist Educ, Key Lab Earth Surface, Beijing 100871, Peoples R China; Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Urbanization can exert a profound influence on land covers and landscape characteristics. In this study, we characterize the impact of urbanization on land cover and lacustrine landscape and their consequences in a large urban lake watershed, Donghu Lake watershed (the largest urban lake in China), Central China, by using Landsat TM satellite images of three periods of 1987, 1993 and 1999 and ground-based information. We grouped the land covers into six categories: water body, vegetable land, forested land, shrub-grass land, open area and urban land, and calculated patch-related landscape indices to analyze the effects of urbanization on landscape features. We overlaid the land cover maps of the three periods to track the land cover change processes. The results indicated that urban land continuously expanded from 9.1% of the total watershed area in 1987, to 19.4% in 1993, and to 29.6% in 1999. The vegetable land increased from 7.0% in 1987, 11.9% in 1993, to 13.9% in 1999 to sustain the demands of vegetable for increased urban population. Concurrently, continuous reduction of other land cover types occurred between 1987 and 1999: water body decreased from 30.4% to 23.8%, and forested land from 33.6% to 24.3%. We found that the expansion of urban land has at least in part caused a decrease in relatively wild habitats, such as urban forest and lake water area. These alterations had resulted in significant negative environmental consequences, including decline of lakes, deterioration of water and air quality, and loss of biodiversity.
英文摘要: Urbanization can exert a profound influence on land covers and landscape characteristics. In this study, we characterize the impact of urbanization on land cover and lacustrine landscape and their consequences in a large urban lake watershed, Donghu Lake watershed (the largest urban lake in China), Central China, by using Landsat TM satellite images of three periods of 1987, 1993 and 1999 and ground-based information. We grouped the land covers into six categories: water body, vegetable land, forested land, shrub-grass land, open area and urban land, and calculated patch-related landscape indices to analyze the effects of urbanization on landscape features. We overlaid the land cover maps of the three periods to track the land cover change processes. The results indicated that urban land continuously expanded from 9.1% of the total watershed area in 1987, to 19.4% in 1993, and to 29.6% in 1999. The vegetable land increased from 7.0% in 1987, 11.9% in 1993, to 13.9% in 1999 to sustain the demands of vegetable for increased urban population. Concurrently, continuous reduction of other land cover types occurred between 1987 and 1999: water body decreased from 30.4% to 23.8%, and forested land from 33.6% to 24.3%. We found that the expansion of urban land has at least in part caused a decrease in relatively wild habitats, such as urban forest and lake water area. These alterations had resulted in significant negative environmental consequences, including decline of lakes, deterioration of water and air quality, and loss of biodiversity.
关键词[WOS]: EXPANSION
语种: 英语
WOS记录号: WOS:000238973500019
ISSN号: 0167-6369
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8910
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China
2.Peking Univ, Minist Educ, Key Lab Earth Surface, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China

Recommended Citation:
Li, Yan; Zhao, Shuqing; Zhao, Kun; Xie, Ping; Fang, Jingyun.Land-cover changes in an urban lake watershed in a mega-city, Central China,ENVIRONMENTAL MONITORING AND ASSESSMENT,2006,115(1-3):349-359
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