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Land-cover changes in an urban lake watershed in a mega-city, Central China
Li, Yan; Zhao, Shuqing; Zhao, Kun; Xie, Ping; Fang, Jingyun; Fang, JY, Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China
2006-04-01
Source PublicationENVIRONMENTAL MONITORING AND ASSESSMENT
ISSN0167-6369
Volume115Issue:1-3Pages:349-359
AbstractUrbanization 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.; 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.
SubtypeArticle
KeywordCentral China Donghu Lake Land Cover Change Landscape Characteristics Remote Sensing Urbanization Urban Lake Watershed
DepartmentPeking 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
Subject AreaEnvironmental Sciences
DOI10.1007/s10661-006-6559-z
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000238973500019
WOS KeywordEXPANSION
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8910
Collection期刊论文
Corresponding AuthorFang, JY, Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China
Affiliation1.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
GB/T 7714
Li, Yan,Zhao, Shuqing,Zhao, Kun,et al. Land-cover changes in an urban lake watershed in a mega-city, Central China[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2006,115(1-3):349-359.
APA Li, Yan,Zhao, Shuqing,Zhao, Kun,Xie, Ping,Fang, Jingyun,&Fang, JY, Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China.(2006).Land-cover changes in an urban lake watershed in a mega-city, Central China.ENVIRONMENTAL MONITORING AND ASSESSMENT,115(1-3),349-359.
MLA Li, Yan,et al."Land-cover changes in an urban lake watershed in a mega-city, Central China".ENVIRONMENTAL MONITORING AND ASSESSMENT 115.1-3(2006):349-359.
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