![]() ![]() Self-Sufficient urban areas within a greater metropolitan complex.All the amenities needed for living are now located in the suburban downtown.Suburban downtowns have become independent functioning “urban realms”.Separate nuclei become specialized and differentiated, not located in relation to any distance attributeĭeveloped to explain suburban regions that were functionally tied to mixed-use suburban downtowns with relative independence from the CBD.Suggest growth occurred independently around several major focal points.Chauncy Harris & Edward Ullman (1945) neither of previous two models are accurate.Sectors that service visitors are located along major highways.Lower socioeconomic housing follows lines of public transportation.Many factories and industrial activities follow rail lines.Not just concentric zones around the CBD.Urban land use and growth are based on transportation routes and linear features like roads, canals, railroads, and major boulevards.Homer Hoyt (1939) criticized Burgess Model as too simple & inaccurate Eventually people and economic activities in the center are pushed out into farther rings.New arrivals to cities tend to move first into the inner rings, near the CBD.A series of migration waves, with one group moving in and establishing itself.The Concentric Zone model assumes a process called invasion and succession (succession migration). ![]() Dynamic: city grows inner rings affect outer ones.The degree of influence and geographic location of the CBD varies model to model.ĭeveloped in the 1920s the concentric zone model was the first model to explain and predict urban growth.Central Business District: Original core of the economy, like the nucleus of a cell.Most focus on patterns of internal growth in U.S.To understand why cities are spatially organized in various ways, geographers have developed models that explain and predict the internal structures of cities. ![]()
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