Climate change is likely to threaten the already-limited fresh water resources in Barbados significantly in two ways. First, by sea level rise, which is likely to increase saltwater intrusion into freshwater aquifers. Second, the increasing frequency of drought conditions will strain the production of aquifers and lengthen their regeneration time. According to the Caribsave Climate Risk Atlas (CCCRA), approximately 86.4% of potable water is sourced from just three catchments on the island. These are St. Michael (52.8%), St. Phillip (20.2%) and the West Coast (13.4%). With rainfall rates projected to decrease and average temperatures projected to increase, the recharge rate for these catchments will be reduced drastically.
This section provides insights into projected climate change impacts on various hydrological indicators.