An advantage of the Harris and Ullman multiple nuclei model over the Burgess concentric zone model and the Hoyt sector model of internal city structure is that the multiple nuclei modela. easily incorporates depiction of linear and areal physical relief featuresb. allows for the central business district to be situated in an edge cityc. is also applicable to rural areas beyond the urban peripheryd. easily incorporatesconstruction of a new airport on the urban peripherye. has a monocentric focus that limits the inclusion of urban sprawl

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada