Coastal communities across the world are increasingly facing up to the huge threats posed by a combination of extreme storms and predicted rises in sea levels as a result of global climate change.
However, scientists at the University of Plymouth have developed a simple algorithm-based model which accurately predicts how coastlines could be affected and - as a result - enables communities to identify the actions they might need to take in order to adapt.
The Forecasting Coastal Evolution (ForCE) model has the potential to be a game-changing advance in coastal evolution science, allowing adaptations in the shoreline to be predicted over timescales of anything from days to decades and beyond.
This broad range of timescales means that the model is capable of predicting both the short-term impact of violent storm or storm sequences (over days to years), as well as predicting the much longer-term evolution of the coast due to forecasted rising sea levels (decades).
Dr Mark Davidson, Associate Professor in Coastal Processes
Dr Mark Davidson, Associate Professor in Coastal Processes, developed the ForCE model having previously pioneered a traffic light system based on the severity of approaching storms to highlight the level of action required to protect particular beaches. He said:
"Top level coastal managers around the world have recognised a real need to assess the resilience of our coastlines in a climate of changing waves and sea level. However, until now they have not had the essential tools that are required to make this assessment. We hope that our work with the ForCE model will be a significant step towards providing this new and essential capability."
The University of Plymouth is one of the world's leading authorities in coastal engineering and change in the face of extreme storms and sea-level rise.
Researchers from the University's Coastal Processes Research Group have examined their effects everywhere from the coasts of South West England to remote islands in the Pacific Ocean.
They have shown the winter storms of 2013/14 were the most energetic to hit the Atlantic coast of western Europe since records began in 1948, and demonstrated that five years after those storms, many beaches had still not fully recovered.
Case study
Researchers have been carrying out beach measurements at Perranporth in North Cornwall for more than a decade. Recently, this has been done as part of the £4million BLUE-coast project, which aims to address the importance of sediment budgets and their role in coastal recovery.
Surveys have shown that following extreme storms, such as those which hit the UK in 2013/14, beaches recovered to some degree in the summer months but that recovery was largely wiped out in the following winters. That has created a situation where high water shorelines are further landward at sites such as Perranporth.
Sea level is presently forecast to rise by about 0.5m over the next 100 years. However, there is large uncertainty attached to this and it could easily be more than 1m over the same time-frame. If the latter proves to be true, prominent structures on the coastline - such as the Watering Hole bar - will be under severe threat within the next 60 years.
This chart shows the ForCE model's prediction of what could happen at Perranporth if sea-level rises are as, or greater than, currently expected
- The full study - Davidson, M: Forecasting coastal evolution on time-scales of days to Decades, Coastal Engineering (2021), doi: https://doi.org/10.1016/j.coastaleng.2021.103928.
World leaders
We are ranked the number one university globally for the United Nations' Sustainable Development Goal number 14: life below water.
The award recognises the quality of our marine research and teaching as well as our efforts to reduce the impact of campus activities on the marine environment. The Times Higher Education Impact Rankings are the only global performance tables that assess universities against the United Nations' Sustainable Development Goals (SDGs).
Times Higher Education Impact Rankings 2021: life below water
Coastal Processes Research Group
The Coastal Processes Research Group is an internationally recognised group of researchers, specialising in field studies of coastal processes and seeking to understand and predict the behaviour of coastal and estuarine systems. Research topics include:
- beach morphodynamics and nearshore sediment transport
- coastal erosion and storm impacts
- video monitoring of coastal systems
- coastal process modelling
- estuarine processes and evolution.
The group operates a research-informed consultancy Coastal Marine Applied Research.
