Study on Evaluation Methods of Resource and Environmental Carrying Capacity of Urban Agglomerationsbased on the Definition of “Three Districts and Three Lines”: Example from Guanzhong Plain Urban Agglomeration Evaluation

Research on functional zoning of land use is a process of optimizing the pattern of land space development and allocating resources scientifically. The evaluation of regional resource and environment carrying capacity is the precondition and foundation to determine the intensity of resource and environment development and utilization and the functional zoning of land use. Taking the important node city of Guanzhong plain urban agglomeration as the evaluation unit, the constraint conditions of underground geological structure, surface resource environment and ecological environment characteristics, as well as the system bearing saturation have been taken as the evaluation criteria for influencing the zoning. And then, the grading evaluation system for crustal stability, the ecological sensitivity grading evaluation system and the evaluation index system of resource and environment bearing capacity based on CCPS have been established in this paper. The dynamic weighted summation method and the comprehensive evaluation value of the suitability of land space development representing the "three dimensions" of constraint layer, support layer and pressure layer have been used to integrate the indexes. Finally, a new idea of resource and environmental carrying capacity evaluation for "three districts and three lines" has been proposed to reasonably determine the hierarchical layout defined by the three Spaces and three control lines of the evaluation unit, which can provide scientific research foundation and systematic thinking frame for the in-depth study of similar evaluation in the same period.