Landscape ecological risk assessment of coastal cities in China based on land-use change

Authors: Wen Zhang*, School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China, Hui Zeng, School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China
Topics: Coastal and Marine
Keywords: coastal cities,landscape ecological risk assessment, land use
Session Type: Paper
Day: 4/6/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Balcony B, Marriott, Mezzanine Level
Presentation File: No File Uploaded

In order to explore the effects of human activities and land-use structure change on the safety of coastal cities, taking 48 coastal cities in China as the research object, using data from 6 periods of land-use in 1990, 1995, 2000, 2005, 2010 and 2015, according to the landscape ecology theory and based on the actual situations in the study area, this study constructed the landscape ecological risk index based on the landscape pattern index to analyze the temporal and spatial variation characteristics of land-use and ecological risk in coastal cities. The results showed that the area of urban construction land has been greatly increased in 1990-2015 years due to the farmland changing into it, while the areas of farmland and grassland are declining year by year. The landscape ecological risk of coastal cities is deteriorating at first and then improved. The high risk areas are gathered in Bohai coastal, East and South coastal areas with rapid urbanization process while the low risk areas are gathered in the Yellow Sea coastal cities. In the study period, the ecological risk of coastal cities presents a positive spatial autocorrelation, in Jiaodong Peninsula, a significant high - high aggregation, and a significant low - oligomeric collection in Jiangsu province; the spatial positive correlation of ecological risk in coastal cities is declining year by year, and the distribution of ecological risk has a dispersed trend. The results of this study provide a scientific theoretical basis for the optimization of coastal ecological landscape pattern.

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