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Urban Patterns and Environmental Performance: What Do We Know?

College of Architecture and Urban Planning at the University of Waishington, Seattle; malberti{at}u.washington.edu

This paper reviews the empirical evidence on the relationships between urban patterns and various dimensions of environmental quality and performance. I first examine approaches to measuring urban environmental perfomance, drawing on the concepts of carrying capacity, ecological footprint, environmental space, and appropriated ecosystem area. Since cities affect and are affected by ecological systems far beyond their physical boundaries, I propose including interactions at the local, regional, and global scales in the definition of environmental performance. I then systematcally review the current literature on the reltionship between four structural variables typically used to describe urban patternform, density, grain, and connectivity and four dimensions of environmental perfomance sources, sinks, ecological support systems, and human well-being. I conclude that what we measure and the scale of analysis affect the direction of observable urban ipacts. We must consider these factors as we select measures of urban environmental peformance.

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				M. Alberti The Effects of Urban Patterns on Ecosystem Function International Regional Science Review, April 1, 2005; 28(2): 168 - 192. [Abstract] [PDF]