Peri-urbanization and Global Environmental Change

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  Biophical Valuation

        of  Ecosystem Service

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Objectives / Approach

Last Updated: 2008-07-15

The overall aim of PU-GEC is to use Taipei-Taoyuan area as a pilot study to frame the relationships of peri-urbanization, land use and land cover change, ecosystem services valuation, resilience of urban ecosystem, and global environmental change.

 More specifically, the objectives to be achieved by this project:

    -  To study the influence of globalization on land use and land cover change in the Taipei-Taoyuan peri-urban area.

    -  To study changes in ecosystem service in the case study peri-urban area as a result of land use and land cover change.

    -  To study interactions among global environmental change, peri-urbanization, and ecosystem resilience in Taipei -Taoyuan area.

 The project uses the following methodologies:

1.     Spatial analysis of geographic information: The first year of the project focuses on collecting data regarding natural environment and resource base of the study area. Remote sensing technologies provide powerful tools for studying urban land use changes and have been widely employed to detect and monitor land cover change during the recent decades. The SPOT Images of 1990, and 2006 will be interpreted, using ERDAS IMAGINE 8.4, and compared with a land cover map of 1971 to study the changes in land use during the past decades and their relevance to globalization. The spatial analytical capabilities of GIS are also used to calculate landscape metrics to help analyze the spatial and temporal pattern of land cover change and their relationships with other physical factors.

 2.     Emergy synthesis: Based on the research finding during the first year, the aim of research during the second year will employ theories of systems ecology and apply ecological energetic analysis to value the worth of natural environment and ecosystem services in Taipei-Taoyuan¡¦s peri-urban area to the socioeconomic system in the region. Emergy synthesis, developed by H. T. Odum, will be employed as a biophysical approach for valuing ecosystem services. By converting all stocks and flows into common emergy unit, the impact of land use change in the study region on ecosystem and life-supporting functions can be studied using emergy indices.

 3.     Integrated spatial system modeling: During the third year, this study will develop an integrated urban ecosystem model with spatial simulation capability to study the interaction among system components within the urban system and to simulate the resilience of the urban system in the face of global environmental change and land use change in peri-urban areas.



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