What is an exception test?
The exception test shows how you’ll manage flood risk on your proposed site. In your exception test, you need to show that the sustainability benefits of the development to the community outweigh the flood risk.
Do I need a flood risk assessment?
You need to do a flood risk assessment for most developments within one of the flood zones. This includes developments: in flood zone 2 or 3 including minor development and change of use. more than 1 hectare (ha) in flood zone 1.
What is a sequential assessment?
A Town Centre Sequential Assessment is an assessment of the availability, suitability and viability of sites within or on the edge of existing town centre areas (defined on the Local Plan proposals maps) to accommodate a proposed main town centre use developments defined in Annex 2 of the NPPF outside the town centre …
What is flood zone 3 UK?
Flood zone 3b’s are classified as functional floodplain, and are deemed to be the most at risk land of flooding from rivers or the sea. Local planning authorities have classified areas at significant risk of flooding to be within flood zone 3b.
What is the exception test in flood risk?
The Exception Test is designed to allow appropriate and safe development to proceed in scenarios where the Sequential Test has been passed, i.e. where it has been shown that suitable sites at lower risk of flooding are not available.
What should a flood risk assessment include?
For all developments covered by this standing advice, your FRA should include: your site address. a description of your development. an assessment of the flood risk from all sources of flooding for your development, plus an allowance for climate change.
What is included in a flood risk assessment?
A flood risk assessment (FRA) is a document that reviews a development in its proposal form to assess it against the risk of flooding, whether that be from groundwater, river (fluvial), surface water (pluvial), estuary/coastal (tidal), or from sewer sources.
What is a retail impact assessment?
A retail impact assessment shows the impact of your proposal on the vitality and viability of existing centres within the area of your proposed development. This includes the likely cumulative effect of recent permissions, development under construction and complete developments.
Can you develop in flood zone 3?
Flood zone 3b
Protecting the flood plain is absolutely critical, yet flooding should not be used to blight existing settlements. Existing settlements should never be shown within 3b. The only types of existing development which can be shown within 3b are water compatible or essential infrastructures.
Is Flood Zone 2 high risk?
Flood Zone 2 – land assessed as having between a 1 in 100 and 1 in 1,000 annual probability of river flooding (1%– 0.1%). Or between a 1 in 200 and 1 in 1,000 annual probability of sea flooding (0.5%– 0.1%) in any year – medium risk.
What is the purpose of flood risk assessment?
The goal of flood hazard assessment is to understand the probability that a flood of a particular intensity will occur over an extended period of time. Hazard assessment aims to estimate this probability over periods of years to decades to support risk management activities.
What is a flood risk report?
A Flood Risk Report is an assessment of how likely it is that the property you’re intending to purchase will suffer from flooding at some point in the future, based on floods from the past. It is estimated that as much as 10% of residential properties are not insurable at standard rates (JBA).
How long does a flood risk assessment last?
The final flood risk assessment report can take up to 25 working days. The Environment Agency has a response time of 21 working days. In some cases, we can obtain the data within 3 weeks; however it depends on their workload.
How do you manage flood risk?
make sure their systems have the appropriate level of resilience to flooding, and maintain essential services during emergencies. maintain and manage their water supply and sewerage systems to manage the impact and reduce the risk of flooding and pollution to the environment.
What is a retail sequential test?
The sequential test is used to guide commercial developments to a suitable location, giving justification for the final chosen location. The scope of the test and the alternative locations to be considered should be agreed with the Local Planning Authority.
What is a town Centre use?
Town centre and community facilities provide the key services that people need. They can include facilities such as shops, cafes, restaurants, public houses, cultural and leisure venues, cinemas, museums and sports centres, hotels, schools, libraries, health centres, places of worship and community centres.
What is the difference between flood zone 3a and 3b?
Flood Zone 3a High Probability – Land having a 1 in 100 or greater annual probability or river flooding; or Land having a 1 in 200 or greater annual probability or sea flooding. Flood Zone 3b The Functional Floodplain – This zone comprises land where water has to flow or be stored in times of flood.
What type of foundation is best for flood zone?
There are two types of housing foundations that are best for flood zones— pier and beam and pile foundations. With pier and beam foundations, treated wooden stilts rest on strategically placed concrete platforms.
What is the lowest risk flood zone?
Zone C
The areas of minimal flood hazard, which are the areas outside the SFHA and higher than the elevation of the 0.2-percent-annual-chance flood, are labeled Zone C or Zone X (unshaded).
What is a level 2 flood risk assessment?
A Level 2 SFRA is a detailed assessment of all sources of flood risk for specified sites requiring targeted assessment. Flood sources studied included fluvial, surface water, sewer, groundwater and reservoir failure floods. A total of 18 sites were assessed as part of this Level 2 SFRA.
What are the types of flood risks?
Various climatic and non-climatic processes can result in different types of floods: riverine floods, flash floods, urban floods, glacial lake outburst floods and coastal floods. Floods are the natural hazard with the highest frequency and the widest geographical distribution worldwide.
How do you calculate flood risk?
A property’s Flood Factor is determined by its likelihood of flooding and the potential depth of that flood. Because flood risks accumulate over time, it specifically looks at the likelihood of 1 inch of water reaching the building footprint of a home at least once within the next 30 years.
What is a flood risk map?
These map includes flood from rivers and sea for planning purposes, surface water run-off maps and reservoir maps. For instance the Flood Map for Planning (Rivers and Sea) includes several layers that covers Flood Zone 2 and Flood Zone 3. It evaluates the risk of flooding by ignoring the presence of flood defences.
Who is responsible for flood risk?
Every London borough is responsible for flooding as a Lead Local Flood Authority (LLFA). They work in partnership with the Environment Agency, Thames Water and other stakeholders to manage flood risk.
What are the main factors affecting flood risk?
Rainfall is the most important factor in creating a flood, but there are many other contributing factors. When rain falls on a catchment, the amount of rainwater that reaches the waterways depends on the characteristics of the catchment, particularly its size, shape and land use.