functions of cities
The predominance of a single axis in the urban district of the organization and the absence of any significant transverse directions of development leads to the inevitable occurrence of eccentricity in the structure of the center zone of influence overlapping zones of accessibility in the direction of the chain of existing centers. Delineation of the objects in such situations should contribute to the creation of prerequisites that disparities of urban development, consisting in the excessive concentration of functions along a single axial direction, and the extreme weakness of the development of inland areas of resettlement.
Thus, the functions of cities - potential centers of group systems in the Irkutsk region of Irkutsk, in addition to resettlement can perform Angarsk, Usolie-Siberian, Cherm, Winter. However, if the Winter and Cherm because of the prevailing geographic and urban situations form their own zone of influence, appropriate parameters of the potential of promising group systems of settlements, the territorial cohesion of Irkutsk, Angarsk and Usolye Siberian makes the artificial isolation of zones of influence of each of these cities in the prevailing conditions of their close functional interaction. Analysis showed the feasibility of forming under these conditions, the group system in the Irkutsk and Usolsky administrative districts, the longitudinal axis which stretches about 140 km and the maximum transverse distance within the reclaimed area is about 70 km.
Providing social and functional unity of the group system - the main condition for the spatial integrity of the expanded boundaries of life processes, emerged beyond the individual city. With the formation of group systems in spatial planning lays the possibility of establishing a set of localities in which the change of location of the working residents of a settlement may not be necessary to cause a change of residence and vice versa. Increases the effect of previously spent on construction of various infrastructure investments anywhere in the system, since the main condition of its formation becomes their integrated functioning. With increasing saturation of the transport and communication area group system, the possibilities of attracting labor, including the rural population, while maintaining his residence.
In group systems localities formed a socio-economic situation in which can be not only dramatically reduced the outflow of population from areas of rural settlement, but it usually can be stabilized and in some cases increase. This process is typical of rural areas located in zones of influence of large and major cities, depends on several factors, among which the most important - the degree of interconnectivity of the rural population to urban agglomerations and in the first place, with the city center. This is evidenced by the fact of stabilization of the rural population living in administrative areas headed by a major city and adjacent to it.