What sea defenses are being used to stop eroshon on the holderness coast?

* Sea walls: These are vertical walls built along the coastline to prevent waves from reaching and eroding the land behind them. Sea walls are typically made of concrete or stone, and they can be very effective in protecting coastlines from erosion. However, they can also be expensive to build and can have a negative impact on the natural environment.

* Groynes: These are structures built perpendicular to the coastline to trap sand and prevent it from being washed away by waves. Groynes are typically made of wood, concrete, or stone, and they can be very effective in protecting beaches from erosion. However, they can also be expensive to build and can have a negative impact on the natural environment.

* Breakwaters: These are structures built offshore to break up waves before they reach the coastline. Breakwaters are typically made of concrete, stone, or wood, and they can be very effective in protecting coastlines from erosion. However, they can also be expensive to build and can have a negative impact on the natural environment.

Soft engineering techniques:

* Beach nourishment: This involves replenishing a beach with sand that has been eroded away by waves. Beach nourishment can be a very effective way to protect coastlines from erosion, but it can also be expensive and time-consuming.

* Dune restoration: This involves restoring or creating sand dunes along the coastline. Dunes can help to protect coastlines from erosion by trapping sand and dissipating wave energy. Dune restoration can be a very effective way to protect coastlines from erosion, but it can also be time-consuming and can require a lot of maintenance.

* Vegetated buffers: These are areas of vegetation planted along the coastline to help hold the soil in place and prevent erosion. Vegetated buffers can be very effective in protecting coastlines from erosion, but they can also be expensive to establish and maintain.

Other techniques:

* Managed retreat: This involves allowing the coastline to retreat naturally, rather than trying to prevent it. Managed retreat can be a very effective way to protect coastlines from erosion, but it can also be difficult to implement, as it may require relocating people and businesses that are located in vulnerable areas.

* Artificial reefs: These are structures built offshore to create a habitat for marine life and to help dissipate wave energy. Artificial reefs can be very effective in protecting coastlines from erosion, but they can also be expensive to build and can have a negative impact on the natural environment.

The best sea defense technique for a particular coastline will depend on a number of factors, including the type of coastline, the wave climate, and the budget available.