Multiple Nuclei Theory

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Introduction

Multiple Nuclei Theory This theory was first proposed in 1945 by Harris and Ullman. They constructed this model to demonstrate that not all cities fit into the concentric and sector model. They claimed that although these patterns may exist, reality is far more complex than those two theories imply. They argued that land use patterns do not grow from a single central point in the city but from multiple points or nuclei.

Middle

The character of land use distribution around growth poles is determined by: - the unique factors of the site - the history of individual city In the past, some cities have engulfed surrounding settlements or have evolved strong suburban areas around the periphery of the city. This situation causes the 'suburbs' to function as small independent business districts, with their own shops and businesses away from the main urban centre.

Conclusion

These nuclei are likely to grow as the main CBD has done, creating one large urban area as they all merge together. The emergence of new nuclei is attributed to: - Specialized requirements of particular activities - agglomeration economies :the tendency for some activities to group together to increase profits by cohesion (economies of scale) - agglomeration diseconomies : high competitiveness - differences in land values :the effect of city rent rate structure on attracting or repelling certain activities High income groups occupy the most desirable locations while low income residents are clustered in contaminated environments.

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