Research on Geological Environmental Carrying Capacity Evaluation Based on the FAHP-CRITIC Weighting Method: A Case Study of the Northern New District of Liaoyuan City

This study focuses on the Northern New District of Liaoyuan City, Jilin Province, and develops an indicator-based relative spatial assessment framework for geological environmental carrying capacity. Fourteen indicators were selected from the geological, ecological, and socio-economic dimensions to characterize spatial differences in regional geological environmental conditions. The weights of the indicators were determined by integrating subjective and objective methods, where the Fuzzy Analytic Hierarchy Process (FAHP) and the CRITIC method were applied respectively, and the final composite weights were obtained through a game theory-based combination weighting approach. Based on the weighted results, ArcGIS was used to perform spatial analysis, and the geological environmental carrying capacity was classified into four levels: excellent, good, moderate, and poor. The results indicate significant spatial heterogeneity in geological environmental carrying capacity. Moderate-capacity areas dominate the study area, with poor-capacity areas mainly distributed in the central and southeastern regions. The proposed framework provides spatial information for identifying areas with different geological environmental conditions and supports differentiated environmental management and planning in mining areas.