Coupling research on spatio-temporal differentiation of water resources carrying capacity in mature mining cities

Abstract Long-term unreasonable mining has seriously affected the water resources quality of mature cities, but development is an important economic pillar those cities. The problems between sustainable cities and environmental protection need to be solved urgently. Based on state-danger-immunity (SDI) conceptual framework, this paper constructs evaluation system carrying capacity (WRCC), calculates temporal spatial differentiation WRCC from 2013 2019 by combining criteria importance through intercriteria correlation (CRITIC) method, catastrophe progression model coupling degree model. results show that: (1) except that grade Bozhou rose overload, other remained unchanged. Huainan, Chuzhou Xuancheng all showed a downward trend, Suzhou Chizhou were relatively stable, upward trend. (2) oblique N-type fluctuation. change range state was small, changes in security danger risk immunity completely opposite. (3) coordinated as whole with changed primary imbalance severe imbalance. Other have been