Evaluation of urban flood resilience and analysis of obstacle factors in northeast Sichuan based on PSR modeling

In this study, a comprehensive evaluation system of flood resilience is constructed based on the PSR framework with five cities in the northeastern region of Sichuan Province as samples. By quantitatively assessing the development dynamics of urban flood resilience during the decade 2014-2023, and applying the barrier degree model to identify key constraints. It is found that: the overall level of urban flood resilience in the study area shows a steady improvement trend, but the spatial differentiation characteristics are significant, and there are obvious gaps in the level of resilience development among different cities; river density, topographic slope and over-density of population are the main constraints to the regional resilience enhancement of the obstacle factors. Based on this, it is recommended to adopt differentiated management strategies, strengthen the layout of flood control infrastructure in areas with significant topographic relief, optimize the spatial distribution pattern of population to reduce disaster exposure, and systematically promote the ecological restoration of urban water systems and comprehensive management projects, so as to enhance the resilience level of regional floods with a multi-dimensional synergistic path.