Coastal Ecology & Conservation

Scientific overview of Tuerredda's sand dunes, carrying capacity calculations, and preservation rules

Photo by zipckr / Flickr

Geomorphology and Dune Systems

Spiaggia di Tuerredda is built from fine, light-colored quartz and limestone sands, shaped over millennia by complex marine deposits and wind dynamics. The beach features a dynamic double-arch shoreline configuration, bordered by rugged granitic headlands that protect the inner bay from heavy wave energy.

Directly behind the sandy shoreline lies a system of coastal sand dunes. These dunes are populated by native Mediterranean vegetation, including maritime junipers, mastic trees, and sea daffodils. This plant life plays a major role in stabilizing the sand dunes, as their deep root systems anchor the sand grains against wind-driven erosion. Walking on the dunes is strictly prohibited, as foot traffic destroys the root networks, triggering rapid sand depletion.

Carrying Capacity Calculations

To combat the ecological threats of over-tourism and sand loss, the Municipality of Teulada enforces a carrying-capacity model. This model was developed in collaboration with regional environmental scientists to determine the maximum number of visitors the beach can host daily without causing irreversible ecological damage.

The daily visitor cap is set at 1,100 people. This limit is based on the available sandy area of the beach and the space needed to maintain proper social distancing and prevent dune compaction. The total capacity is split between the free public beach (729 spots) and the private beach clubs (371 spots).

The Mechanics of the Beach Mat Ordinance

One of the most important conservation rules at Tuerredda is the mandatory beach mat rule (Obbligo Stuoia). Laying standard cotton, terrycloth, or microfiber towels directly on the sand is strictly illegal.

The science behind this rule is simple. The beach sand is exceptionally fine. When a wet fabric towel is placed directly on the sand, the fine grains adhere to the damp fibers. When visitors pack up their gear at the end of the day, large amounts of sand are carried away in their bags.

To prevent this, visitors must place a rigid, non-porous mat (made of straw, bamboo, or woven plastic) directly on the sand under any fabric towels. The smooth, dry surface of the mat prevents sand grains from sticking, ensuring the sand remains on the beach.

Preservation Rules

  • No Towels on Sand: Rigid mats must be placed underneath.
  • Dunes Off-Limits: Stay behind the protective fences.
  • No Single-Use Plastics: Bring steel flasks and reusable wraps.
  • No Shell/Sand Collection: Heavy administrative fines apply.

Regional Law 16/2017

Under Sardinian regional law, taking sand, shells, or gravel from any beach is a serious crime.

Violators are subject to fines between €500 (~$545) and €3,000 (~$3,270). Airport scanners are configured to flag smuggled containers of sand.