Spain’s beaches face the loss of up to 80 meters of sand before 2100 due to erosion and the rise in sea level. This warning comes from coastal dynamics experts, who emphasize a significant transformation of the Spanish coastline in the coming decades.
Erosion and Sea Rise: An Imminent Threat to Spanish Beaches
The problem not only affects the space for tourism, but it also represents an environmental crisis that endangers coastal ecosystems. The loss of beaches negatively impacts biodiversity and the ability of coasts to adapt to climate change.
The combination of sea level rise, coastal erosion, port infrastructures, and urban development accelerates the deterioration of the coastline. Vital sediments that should reach the sea are being blocked by dams, contributing to a severe deficit on the coasts.
This retention of sediments, along with the expansion of ports and promenades, prevents marine currents from adequately distributing materials, leaving coasts vulnerable to waves.
Experts point out that the increase in sea level causes a natural retreat of beaches; for every centimeter of rise, approximately one meter of sand can be lost.
Additionally, rivers, which have historically transported sediments to the coastline, are increasingly obstructed by infrastructures such as dams and reservoirs.
Coastal facilities, including marinas and breakwaters, interrupt the natural flow of materials between beaches, exacerbating erosion.
In regions like the Basque Country and Cantabria, studies indicate significant surface losses in beaches of Gipuzkoa and Bizkaia. In Galicia, dune restoration projects are being promoted to reinforce the natural defense against erosion.
In the Mediterranean, areas like the Costa Brava in Catalonia and La Manga in Murcia show accelerated retreat, worsened by maritime storms and intense urbanization.
Meanwhile, in Andalusia and the archipelagos of the Balearic and Canary Islands, the loss of natural coasts has led to emergency measures, such as sand transfers, to mitigate the effects of storms.
Experts insist that there is still room for action. Future strategies must focus on coastline regeneration and better territorial planning, avoiding new constructions that impede the natural movement of sediments.
Sand is a precious resource and its loss affects both the landscape and biodiversity, the local economy, and the resilience of coasts to extreme weather events.
It is essential that Spain prioritizes the conservation of coastal sediments to protect its natural and tourist resources.
