Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Satellite Monitoring of Urbanization and Indicator-based Assessment of Environmental Impact
As of 2018, 55% of the world population resides in urban areas. This proportion is projected to increase to 68% by 2050 (United Nations 2018). The Stockholm region is no exception to this urbanizing trend: the population of Stockholm City has risen by 28% since the year 2000. One of the major consequences of urbanization is the transformation of land cover from rural/natural environments to impervious surfaces that support diverse forms of human activity. These transformations impact local geology, climate, hydrology, flora and fauna and human-life supporting ecosystem services in the region where they occur. Mapping and analysis of land-cover change in urban regions and monitoring their environmental impact is therefore of vital importance for evaluating policy options for future growth and promoting sustainable urban development.The overall objective of this research is to investigate the extent of urbanization and analyze its environmental impact in and around selected major cities in North America, Europe and Asia by evaluating change in relevant environmental indicators, from local to regional scales. The urban regions examined are the Greater Toronto Area in Canada, Stockholm City, region and County in Sweden and Shanghai in China. The analyses are based on classifications of optical satellite imagery at medium to high spatial resolutions (i.e, Landsat TM/ETM+, SPOT 1/5, Sentinel-2A MSI and QuickBird-2/WorldView-2) between 1985 and 2018. Various classification techniques (maximum likelihood under urban/rural masks, object-based image analysis with rule-based or support vector machine classifiers) were used with combinations of spectral, shape and textural input features to obtain high accuracy classifications. Environmental indicators such as landscape metrics, urbanization indices, buffer/edge/proximity analysis, ecosystem service valuation and provision bundles as well as habitat connectivity were calculated based on the classifications and used to estimate environmental impact of urbanization.The ...
Satellite Monitoring of Urbanization and Indicator-based Assessment of Environmental Impact
As of 2018, 55% of the world population resides in urban areas. This proportion is projected to increase to 68% by 2050 (United Nations 2018). The Stockholm region is no exception to this urbanizing trend: the population of Stockholm City has risen by 28% since the year 2000. One of the major consequences of urbanization is the transformation of land cover from rural/natural environments to impervious surfaces that support diverse forms of human activity. These transformations impact local geology, climate, hydrology, flora and fauna and human-life supporting ecosystem services in the region where they occur. Mapping and analysis of land-cover change in urban regions and monitoring their environmental impact is therefore of vital importance for evaluating policy options for future growth and promoting sustainable urban development.The overall objective of this research is to investigate the extent of urbanization and analyze its environmental impact in and around selected major cities in North America, Europe and Asia by evaluating change in relevant environmental indicators, from local to regional scales. The urban regions examined are the Greater Toronto Area in Canada, Stockholm City, region and County in Sweden and Shanghai in China. The analyses are based on classifications of optical satellite imagery at medium to high spatial resolutions (i.e, Landsat TM/ETM+, SPOT 1/5, Sentinel-2A MSI and QuickBird-2/WorldView-2) between 1985 and 2018. Various classification techniques (maximum likelihood under urban/rural masks, object-based image analysis with rule-based or support vector machine classifiers) were used with combinations of spectral, shape and textural input features to obtain high accuracy classifications. Environmental indicators such as landscape metrics, urbanization indices, buffer/edge/proximity analysis, ecosystem service valuation and provision bundles as well as habitat connectivity were calculated based on the classifications and used to estimate environmental impact of urbanization.The ...
Satellite Monitoring of Urbanization and Indicator-based Assessment of Environmental Impact
Furberg, Dorothy (Autor:in)
01.01.2019
Hochschulschrift
Elektronische Ressource
Englisch
Fjärranalysteknik , Urbanization , green infrastructure , habitat nätverksanalys , Stockholm , ekosystemtjänster , miljöindikatorer , habitat network analysis , Shanghai , marktäckeklassificering , miljöpåverkan , Greater Toronto Area , fjärranalys , ecosystem services , remote sensing , urbanisering , landskapsnyckeltal , grön infrastruktur , environmental indicators , land-cover classification , landscape metrics , environmental impact
DDC:
710
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