How can the coast erosion be stopped?

Water erodes the coast.
The sea is constantly transporting clay and sand away from the beach. The coastline shifts inland at a rate of 1-2 m per year.
The erosion is the result of the action of wind and precipitation. When it rains, the rainwater seeps into the sand until it reaches the thick layer of clay. Then it flows on the clay surface towards the coast, where it finally trickles out of the cliff halfway up.
It is expected that global warming will cause more powerful storms in the future and thus accelerate coastal erosion.
The sea slowly eats its way into the cliffs, and the water along the beach is colored brown by clay and sand.
Various methods have been proposed to contain coastal erosion:

The drainage of the cliffs would slow down the above-mentioned process and would probably be an effective coastal protection.
Groynes and breakwaters would also likely be effective, as seen off L√łnstrup. Especially if you add sand to the beach behind the groynes every year. In L√łnstrup, 20,000-30,000m3 are added per year.
Burying of pipelines on the beach surface (pressure equalization tubes). This method was tested during a trial period on part of the coastal stretch. Their effect is highly controversial. A report on the future of this method was announced for spring 2008.

In the short term, coastal protection would have both advantages and disadvantages.

  • Coastal erosion would stop for a period and the areas behind the cliff could be preserved.
  • Perhaps some of the buildings that are in danger of falling today could be saved.
  • The forward beach, like other beaches, would be wider.
  • The landslide in the cliff would continue, but the material would remain on the beach. The active cliff would reach its passive equilibrium form. The cliff would become flatter and overgrown with beach grass and other dune plants. You would lose the great formations that an active and dynamic cliff has to offer.
  • Coastal protection would be visually daunting.
The sea slowly eats its way into the cliffs.