Flood Risk Assessment – Devon

Southwest Environmental Limited have been commissioned to undertake a Flood Risk Assessment for two lake side holiday lodges, in Devon.

We were approached by Architects who provided plans and fave a description of the proposed development for 2 holiday lodges situate don the edge of a Lake.

This type of development is becoming very popular as it is the 3rd FRA we have prepared for such a development in the Southwest, in recent months.

A Pond

Perhaps the single most important factor is the likely flood depth. For this we have two sources, one being slightly quicker than the other which was used in this instance because the report was required on a quick turnaround.

Southwest Environmental Limited have prepared Flood Risk Assessments for a large variety of developments from small houses, to factories and 200 home developments, we provide the same high level of services to all clients regardless of project value. 

Flood Risk Assessment – Devon

SWEL have recently completed a Flood Risk Assessment for a Site in Totnes, Devon. Our total turn around time for the production of the report was 7 workings days.

Detailed Flood Depth Data

Usual RoFRS Data but on High Resolution

The report includes in depth flood depth data, which was sourced on a quick turnaround.

The report include surface water details (brief), design details and sequential test. The site use type is not ordinary and we made a best case argument for vulnerability classification in this instance.

SWEL regularly prepare flood risk assessment for sites of all types across the UK. We aim to deliver a quick successful report which include a breadth of information suitable for the job in hand.

If you require a Flood Risk Assessment please Contact Us.

Flood Risk Assessment – Bristol

SWEL were recently commissioned to undertake a flood risk assessment in Bristol. This site is an interesting one in terms of settings. As is resides within some characterful gardens walls, which have a curved to match the site boundary.

A Pub near the Site

The key as always with a good flood risk assessment is collecting a wide selection of data to characterize flood risk at the site. 3rd party data reveled flooding of significant depth on site, whilst the Environment Agency data from neighboring sites showed details that will aid in the design of the building.

The report also includes exceptions test, sequential test and surface water recommendations.

Flood Risk Assessment Kent

SWEL were instructed to undertake a Flood Risk Assessment for a proposed development in Romney Marsh, Kent. For a Residential Development.

The scheme saw the construction of 2 homes, on a site occupied by a dilapidated bungalow.

A Wider Variety of Flood Risk Data was Used to form an Opinion

Key the flood risk assessment was establishing the level of protection afforded by the coastal defenses in the area, we arranged to have data supplied on the sea defenses which showed they were in good condition and that they were gave an applicable protection level.

Advise was included on required attenuation volumes, and any special construction techniques.

The sequential test was a key part of the report. We include a sequential test in our flood risk assessment as standard. . .if it is required.

Flood Risk Assessment – Catford SE6

Southwest Environmental Limited were commissioned by a client to undertake a Flood Risk Assessment at a site in South East London.

The project was for conversion of a basement to living quarters. This is usually one of the more difficult situation to get passed off with the Environment Agency (as consultees in planning) as a flooded basement is not a very good thing / situation:

• It is hard to dry out.
• It is hard to get flood data (most relates to ground level).
• Hard to prove people will be safe.

Flood Risk Assessment – Harrow

Southwest Environmental Limited have recently prepared a Flood Risk Assessment for a site in London.

The site was in flood zone 1, and was under the area (1 hectare) that would ordinarily trigger the requirement for a Flood Risk Assessment.

It was our opinion that the Flood Risk Assessment was requested because the site is:

• A risk from surface water flooding.
• Includes a basement. 

Surface Water Flow Velocity

Surface Water Depth

The report recommended that as long as a few simple measures were adopted such as:

There is surface water flooding highlighted as close to site of the extension and basement. Careful consideration will have to give to the avoidance of flow path creation. For example: the ground level at the rear of the building should be maintained so as to prevent surface water flowing towards the rear of the house. This would include depressions created for external stairways. An up an over stair crest may be required to maintain this level.

Removable flood boards should be fitted in all external doorways, up to a height a 50cm above threshold. Levels (front threshold + 50cm) should be matched at rear of property for stair crest.

Flood resilient construction should be used in basement level (see below table). Clear access should maintain from basement to ground floor level. New External and Internal Doors should hinge inwards.

Centralised service nodes such as boilers and consumer units should be situated on the ground floor level.