As coastal cities worldwide face sinking rates of over 2mm per year, researchers are working tirelessly to uncover the root causes of this concerning trend. In a recent study, Prof Manoochehr Shirzaei of Virginia Tech University and Prof Robert Nicholls of the University of East Anglia shed light on the factors contributing to this phenomenon, as well as potential solutions to protect these cities from the encroaching sea.

Prof Shirzaei’s research highlights the geophysical factors that are causing cities to sink, including subsidence and compaction. Subsidence occurs when water is withdrawn from underground aquifers, leaving behind voids that cause the ground to sink. Compaction happens when buildings and infrastructure are built on compacted soils, which can lead to further sinking over time.

Meanwhile, Prof Nicholls focuses on the implications of rising sea levels due to global heating on urban areas. He emphasizes the importance of understanding how sea level rise affects building foundations and infrastructure in order to develop effective solutions for protecting coastal communities.

Despite these challenges, there is hope for coastal cities. Innovative engineering solutions like floating infrastructure and green roofs can help adapt cities to changing environmental conditions. Policy interventions such as zoning regulations and building codes can also play a role in mitigating the effects of sinking cities. Community engagement is also crucial in ensuring that residents understand the risks associated with rising sea levels and take action to protect themselves and their homes.

The conversation between Prof Shirzaei and Prof Nicholls underscores the importance of taking proactive steps to address sinking cities and protect our urban landscapes for future generations. By harnessing the expertise of scientists, engineers, and policymakers, we can work together to build resilient cities that are prepared for the challenges of climate change.