Research On Constructing City-and-town Concentrated Area In Eastern Anhui

City-and-town Concentrated Area (CCA) is a city to turn the highly developed outcome, meaning within the scope of particular region, take one or several cities as the core, the city is occasionally a contact that takes place the close and high strength, the high city turn, the town density is high, intensive town region that the town consecution distribute. It has three main factors of city node, the contact network outlet and the large stomach foundation qualities also. And City-and-town Concentrated Area (CCA) is a development process of dynamic state, we can according to growth degree of City-and-town Concentrated Area (CCA) divide it as different stage grade according to the certain index sign system.The theories of CCA and the city of the international communities turn the experience enunciation, the cities become City-and-town Concentrated Area (CCA) after attain a certain degree, at the beginning of City-and-town Concentrated Area (CCA), City-and-town Concentrated Area (CCA)of gathering effect is lord, at this time City-and-town Concentrated Area (CCA) because of the funds, technique that oneself needs when developing, talented person etc. shortage, then it depends on advantage in district develop, draws on the resources from the peripheral opposite city region that fall behind to develop and strengthen the oneself; After City-and-town Concentrated Area (CCA) develops the certain level, it comes together the effect to start die down, "proliferation effect" strengthens gradually. Three continent regions in eastern Yangtze River of our country, according to geography advantage and the special policy of the nations that it is superiors, in the process of the economic development of the earlier period lead in central part and western region, in development of the city turn and City-and-town Concentrated Area (CCA), according to its economy advantage, from central and western region the region came together a great deal of funds, technique, talented person, the economic quickly develop and strengthen, basic complete the farther process of City-and- town Concentrated Area (CCA) of the gathering effect, starting spreading toward the radiation in the peripheral region.