Seawalls are structures built to protect shorelines from flooding and erosion. They can be made from various materials and can also provide recreational space. Different types of seawalls exist, including those built on the shore or in the water. Traditional dams are made of rocks and pebbles, while modern ones can incorporate concrete and metal rods. Lower barriers may precede seawalls to break up wave energy.
A seawall is a structure designed to protect a shoreline from flooding and erosion. They are typically just one part of a larger coastal defense system designed with several protections in case one or more fails. Many visitors to seaside towns are familiar with the concept of a dike, as are the residents of these regions. There are several ways to build one, depending on the materials available and the needs it must meet.
Essentially, a dike acts as a layer between the vulnerable shoreline and the ocean. Wave action can strike the wall without eroding the shoreline, although the structure itself will eventually break down and require repair or replacement. Dams also help insulate communities from flooding, although high waves can still breach most dams. It can also provide a space for recreation, as the top is often flat, allowing people to walk on it or fish from it.
In some cases, a seawall will be built on the shore to break up high waves that could otherwise damage structures and roads on the shore. In these cases, several lower barriers may precede it, to help break up the wave energy before the waves hit the wall. Other dams are built in the water right next to a coast, as is the case with many islands. Some nations also build them offshore to act as flood barriers and dissipate waves before they reach shore, encouraging them to break more gently.
Many dams are curved, allowing waves to crash against them, reducing their energy. Others are straight and are designed to stop waves. It is not uncommon to bury low mounds of rubble in front of them to help with the goal of reducing the power of the waves as they hit the shore. In the case of a dam intended to resist flooding, it might be quite high so that it can cope with storm surges.
Traditional dams are built with large rocks, pebbles and other rubble; some remains of ancient dams built in this style can be seen in many communities. A modern structure can be made from these materials, although it can also integrate concrete, metal rods, and other tools to make it sturdier. The cheapest dams can be made of wood and plastic, which provide some protection, although they can potentially fail in bad weather.
Protect your devices with Threat Protection by NordVPN
