How do flood storage areas work?

Flood storage areas do not completely remove the chance of flooding and can be overtopped or fail in extreme weather conditions. This dataset is designed to raise awareness of the likelihood of flooding and to encourage people living and working in areas prone to flooding to find out more and take appropriate action.

This is a water-activated flood barrier that is simply laid out to put in place. It will rise on its own once it comes into contact with water. In less than ten minutes, these flood walls can grow up to 3.5 inches high. This product is also stackable to add extra height and can be joined together for added length and protection against floods.

Flood Vents protect houses and buildings during floods by preventing hydrostatic pressure buildup that can destroy walls and foundations. This mitigation technique, referred to as Wet Floodproofing, allows floodwater to freely flow through an enclosure such as a crawlspace or garage.

What is a flood wall?

A flood wall is an engineered structure designed to prevent the encroachment of water onto residential, commercial, or government property.

What are floodwalls and floodgates?

Floodwalls are referred to by their shapes such as T-walls that provide extra stability where conditions warrant, and I-walls that require less fortification. Floodgates are needed where levees or concrete walls cross a road or railroad or where they intersect waterways.

Flood walls Can be used to raise the height of the river bank to a level where the river might not burst its banks. Can be permanent features or incorporated into the design of an area and become invisible. Can also be temporary structures where flood gates or removable ‘stoplogs’ are built to protect a stretch of river.

Our favorite answer is flood walls are designed to prevent a populated area for major flooding. Vertical piles of sandbags is a common method for building a flood wall. Volunteers will frequently build flood walls using sandbags when flooding is imminent. Flood walls may be incorporated into a building’s original design.

Flood walls are usually built because only a narrow right-of-way is available. The presence of existing buildings or other structures is usually the reason for a narrow right-of-way.

What is a floodplain and why is it important?

Especially in flat areas, the floodplain provides a valuable function by storing floodwaters. When fill or buildings are placed in the flood fringe, the flood storage areas are lost and flood heights will go up because there is less room for the floodwaters.

One approach that may be used to address this issue is to require compensatory storage to offset any loss of flood storage capacity. Some communities adopt more restrictive standards that regulate the amount of fill or buildings that can displace floodwater in the flood fringe.

The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Storage Areas. It shows those areas that act as a balancing reservoir, storage basin or balancing pond.