Global Land Subsidence Slows: A Positive Turn

A comprehensive study of 465 cities with over one million inhabitants, conducted between 2014 and 2023, reveals a global trend of slowing land subsidence. Researchers found that while subsidence remains a significant issue, particularly in Southeast Asia, West-Central Asia, and North America, recent years have seen a marked deceleration in many urban areas. Mexico City notably experienced the most severe localized subsidence, with rates exceeding 0.2 meters annually. The research highlights the effectiveness of improved groundwater management strategies in mitigating this phenomenon. Specifically, large-scale water diversion projects and enhanced groundwater management in China's Beijing-Tianjin-Hebei region have significantly eased subsidence by replenishing groundwater. These findings suggest a positive impact of proactive water resource management on urban stability and sustainable development. An open platform has been developed to provide public access to global urban land subsidence data, fostering further research and risk assessment.