令和元年 7 月 3 日
仏国「PLAN DE PRÉVENTION DES RISQUES NATURELS D'INONDATIONCOMMUNE DE BOUJAN-SUR-LIBRON
Catalogue des mesures techniques de réduction de la vulnérabilité」（PLAN FOR PREVENTING NATURAL RISKS OF FLOODING
COMMUNE OF BOUJAN SUR LIBRON
Catalog of technical measures to reduce vulnerability）仮英訳
http://www.boujansurlibron.com/wpcontent/uploads/2018/05/PPRI_ANNEXE_catalogue_des_mesures.pdf（参照：2019/06/28）
国土技術政策総合研究所 河川研究部 水害研究室
板垣 修
生江 恵美子＊この資料は Google 翻訳によって、仏語から英語に機械英訳がなされています。一部の単語については辞書で調べて補足をいたしました。
表紙

Freedom, Equality, Fraternity
France Republic
Prefect of Herault
Departmental Direction of
Territories and Sea Service Water,
Risks and Nature

PLAN FOR PREVENTING NATURAL RISKS OF FLOODING
COMMUNE OF BOUJAN SUR LIBRON

1

Catalog of technical measures to reduce vulnerability
Procedure

Prescription

Public Inquiry

Approval

Elaboration

06/12/2011from 07/03/2016 to 07/04/2016

31/05/2016

2頁
Summary
1. Ensuring the safety of people
Measure 1: identify or create a refuge zone………………………… p5
Measure 2: create a roof opening……………………………………p6
Measure 3: create a balcony or terrace………………………………p6
Measure 4: Install mooring rings for evacuation by boat……………p6
Measure 5: develop the immediate surroundings of the dwelling……………p7
Measure 6: avoid scouring the foundations…………………p7
Measure 7: prevent the flotation of objects............................................p8
Measure 8: materialize the footprints of pools and ponds…………p9
2. Limit damage to property
Measure 9: strengthen the stowage of vats and bottles hydrocarbon………………p10
Measure 10: install cofferdams (flood barriers)…………………………p11
Measure 11: conceal by temporary devices the mouths Ventilation and ventilation hatches,
access hatches to the crawl space……p12
Measure 12: clog the ducts of the networks…………………………p12
Measure 13: protect greenhouses and conservatories………………………p13
Measure 14: use a pump to expel water to the outside…p13
Measure 15: install check valves……………………………p14
Measure 16: use thermal insulators with low water retention (avoid glass wool)……p14
Measure 17: avoid plasterboard partitions………………………p15
Measure 18: install PVC joinery………………..................p15
3. Facilitate the return to normal
Measure 19: put the electrical panel out of water……………………p16
Measure 20: create a downward electrical network……………………p16
Measure 21: create a separate electrical network…………………………p17
2

Measure 22: put out of water the heating installations, the central ventilation and air
conditioning………………………………p17
Measure 23: install doors and French windows with a sill low height…………………p18
Measure 24: install a peripheral drain………………………………p18
3頁
Introduction
Although the definitions of risk and hazard are now known, the notions of stakes andvulnerability remain unclear. Under the heading of issues are mainly grouped people,
buildings, economic activities, equipment and networks. The term vulnerability refers to theresistance of the property to the event. The vulnerability of the goods depends on their nature(house, warehouse, industrial site, heritage, cultural, etc.), their location and their intrinsic
resistance. The more vulnerable a property is, the more predictable damage will be substantial.
Indeed, the current building in flood zone does not integrate the risk either in its structure,
its facilities and even less in its materials, or its equipment. The construction techniqueschosen for economic reasons or lack of knowledge are not adapted to the current, the height
and the speed of rising water. The widespread use of fragile and expensive technicalequipment (equipped kitchen, hi-fi), the use of water-sensitive materials such as glass wool
and the neglect of traditional construction rules have led to a significant increase invulnerability of buildings.
Mitigation is a state-led policy aimed at ensuring the safety of people and reducing thevulnerability of goods (making the amount of damage as acceptable as possible for society) by
advocating simple, effective and consistent measures.
The latter pursue three fundamental objectives:
1. Ensure the safety of people (they can be done by evacuations either by boat or by hoist)
2. Limit damage to property (minimize restoration work)
3. Facilitate a return to normal (this is mainly to limit the time before relocation to thepremises and allow it to be carried out under conditions of safety and sanitation. heavy andexpensive).
These measures (24 in all) are in the form of synthetic files. The latter were developed
following many reflections of a working group led by Claire Boulet-Desbareau, made up of
Bruno Bessis (DGUHC), Fabrice Moronval (DPPR), Jean-Luc Salagnac (CSTB) and the club.
risk of Languedoc-Roussillon.
4頁
3These measures are intended to identify the possible weak points of a building during a flood.
The editorial choice that has been chosen favors these prescriptions in terms of performance,with the fewest details concerning their technical translation. Their condition of
implementation as well as the technical measures which make it possible to respect them havebeen, if necessary, relayed in appendices. These technical data sheets (not exhaustive andintended mainly for residential buildings), are taken from a technical guide entitled "Safety ofpeople in existing buildings" developed in 2004 at the request and with the assistance of the
management Pollution Prevention and Risk Prevention of the Ministry of Ecology andSustainable Development. However, scientific and technical knowledge does not yet permit
the promotion of vulnerability reduction measures for all elements of a construction. In
particular, the behavior to flood, and therefore the resistance, of some materials used in therealization of works such as partitions or insulation is now unknown ... No laboratory test nor
standardization exists today. Only the humidity is the sprinkling of droplets for a few hours istaken into account, in no case immersion for several hours or even days. These themes will
not be addressed in this catalog. No recommended measures will refer to it. We will rightly
point out that there are no ready-made rules to accurately define mitigation measures adapted
to all situations without prior study. In the interest of efficiency and relevance, it will beadvisable to recommend in addition to the measures, a diagnosis of vulnerability of thebuilding.
5頁

1. Ensuring the safety of people
Facilitate putting people out of the water and waiting for help
MEASURE1 Identify or create a refuge area
Interest of the measure
The objective of the refuge zone is to allow the occupants of the building to take shelter
while waiting for evacuation or recession.

For this purpose, it is necessary to identify orcreate a space above the reference flood * fixed by the PPR * plus a safety margin set by the
instructor service. The design of the refuge area should allow people to come forward withrescue teams. She must:

be easily accessible for residents by an internal staircase, or even a ladder always
available,

offer satisfactory security conditions (possibility of calling or signs to the outside).
4

From the refuge area, people must be able to come forward to rescue teams.
offer minimum comfort (space),be easily accessible from the outside for rescue intervention and evacuation of people.

Note that there is not systematically evacuation of all flooded homes. Some people will
sometimes have to wait for the recession for several hours, hence the need to have a suitablerefuge area.
Conditions of implementation
The refuge area must be sized according to the number of inhabitants in the dwelling witha minimum area of 6m2 and 1 m2 per person. The minimum height to allow to wait undercorrect conditions is 1.20m.
The floor must support the extra load caused by the occupants of the house and a lifeguard.
It may then be necessary to strengthen the floor.
Permanent measurement / Heavy work.
Planning, construction and town planning measure (pay attention to consistency with
PLUs).
Collective or individual measure.
Measure that can be generalized to future constructions.
Limit of use
Some homes can be fully submerged under water. They must be examined in detail.
Municipalities must then make specific provisions in their municipal plan of safeguarding(article 13 law No. 2004-811 modernization civil security of August 13th, 2004) and, in themost extreme cases, an expropriation or an amicable acquisition will have to be envisaged.
Application fields
For floods with high water levels.
Accompanying measures
All measures to facilitate the evacuation of persons.

5※（COMMUNE DE BOUJAN-SUR-LIBRON, Préfecture de l'Hérault 2011）5 頁より作成。
Warning: in seismic zone, any modification of the frame requires a strict resect of seismic
construction rules.
Financial aspect
In case of creation of net floor area * (see appendix), the tax implications are thoseconcerning new constructions: housing tax, property tax, departmental tax of sensitive
natural areas (TDENS), local tax of equipment (TLE) and if applicable, departmental taxof the council of architecture, urban planning and environment (TDCAUE), the order ofmagnitude of the cost of the realization of a refuge area of 6 m2 is indicated below according
to the types of framework:For a traditional framework: reinforcement of the floor by insulating panels,
installation of an access door to the attic *, a milling ladder * with its ramp, a chassis *roof: 3000 to 4000 euros.

For a carpentry frame *: removal of the cover on two bays of farmhouses *, removal ofa farmhouse, doubling of farmsteads *, recovery of the roof *, reinforcement of thefloor by insulating panels, access door to the attic * , milling ladder * and wooden ramp,
roof frame *, painting: 4500 to 6000 euros.

6頁
Facilitate putting people out of the water and waiting for help
Measure 2
Create a roof opening
Interest of the measure

6

In the context of rapid floods or torrential floods evacuations by boat are difficult toenvisage because they are considered too dangerous. It may also happen in other casesthat no opening is accessible by boat. As a result, hoisting is often the only possible
solution.
Conditions of implementation
The roof frame with a minimum surface area of 1m2 to allow the simultaneous hoistingof two persons must be able to fold entirely on the roof. The roof frame and the hatch
between the attic and the ground floor must be close. Indeed, the rescuer who accesses
the roof must easily locate this hatch if it is necessary to go for a person still on the groundfloor.
Permanent measurement / Heavy work.
Development, construction measure.
Individual measurement.
Measure that can be generalized to the constructions dutures.
Limit of use
Some homes are not accessible by helicopter, especially those located near the powerlines. The communal safeguard plan drawn up by the municipality must take it into
account in a specific way. Evacuation by boat should be considered and prepared.
Application fields
For floods with high water levels.
Accompanying measures
The refuge area must be in line with the evacuation procedures of the people. In addition,
many measures around the house are needed to facilitate the approach of the helicopter.
Measure 3
Create a balcony or terrace
Interest of the measure
The device consists of creating a balcony or terrace and a window-type opening
communicating with the floor, located above the PHEC.
7

Conditions of implementation
The dimensions of the terrace or balcony can be limited to 1m² since people are safe inside.
The interior configuration of the house must allow easy communication with the balcony.
Permanent measurement / Heavy work
Construction and town planning measure (attention to coherence with PLUs)
Collective or individual measure,
Measure that can be generalized to future constructions
Requires the intervention of a professional (work permit).
Limit of use
In certain cases, it may be necessary to derogate from the urban planning rules in force.
The constraints regarding sight servitudes (Civil Code) must be respected if the balcony orterrace is permanently accessible.
Application fields
For floods with high water levels.
Accompanying measures
The refuge area must be in line with the evacuation procedures of the people. In addition,
many measures around the house are needed to facilitate the approach of the helicopter.
7頁
Measure 4 Install Mooring Rings for Boat Evacuation
Interest of the measure
A mooring ring allows rescuers to attach a boat to evacuate the inhabitants, or refuel them.
Conditions of implementation
The mooring hooks will be sealed in the masonry at different heights to allow relief to hangthe boat regardless of the height of the water.
The hooks will be installed near the balcony or window where the evacuation will take place.
Permanent measurement / Work that can be heavy depending on the type of masonry.
Management measure.
Individual measurement.
Measure that can be generalized to future constructions.
Limit of use
Privilege the installation of a bar with a ring that moves along to overcome the difficulty ofevaluation of the installation height of the ring (and therefore the height of water).
8

Application fields
For any type of flood as soon as the water heights justify evacuation of people.
Accompanying measures
Shelter area, access to the outside: balcony, window or outside staircase.
Measure 5 Arrange the Surroundings
Immediate housing
Interest of the measureThis is to facilitate the operations of hoisting by avoiding the obstacles around the house
likely to hinder or even endanger the rescuers during their intervention.
Conditions of implementation
The presence must be removed:branches on the roof of the house, especially on the slope where the roof frame islocated,electrical and telephone lines close to the house and especially above the house,

television antennas and chimney stacks near the chassis.

※（COMMUNE DE BOUJAN-SUR-LIBRON, Préfecture de l'Hérault 2011）7 頁より作成。
Permanent measure but which requires a regular maintenance (case of the branches) /Works which can be heavy (burial of the electric lines).
Planning measure.
Collective or individual measure.
Measure that can be generalized to future constructions.
9Requires the intervention of an electrical or telephone network operator
Limit of use
An application is required from the dealers.
Application fields
For floods with high water levels.
Accompanying measures
The refuge area must be in line with the evacuation procedures of the people. In addition,
many measures around the house are needed to facilitate the approach of the helicopter.
8頁
Ensure the mechanical resistance of the building
During the flood, the water exerts a very strong pressure on the structures. This pressure canlead to irreversible disorders or even displacement or complete destruction of buildings. Thisphenomenon can be aggravated when the connection between the foundations and theelevations has not been correctly performed. In order to limit the disturbances, it is necessary
to balance the pressures between the outside and the inside of the building. This translates inpractice into a free flow of water inside the building, when it reaches a certain height. Similarly,
the stability of the building is also ensured by the foundations. It may therefore be necessary
to strengthen the connections between the foundations and the structure to prevent thebuilding from sinking. This situation is mainly encountered in the speed-up points of the flows.
Measure 6 avoid scour
Foundations
Interest of the measure
It is a question of avoiding the disorders caused to the structure of the building by thepressure of the water. In particular, this measure aims to protect the superficial foundations
from the risk of scouring, and then their eventual loosening by the installation of a concrete
spade.
Conditions of implementation

10

A concrete spade protects the foundations upstream of the predictable flow. A reinforced
concrete pavement covering (pavement) joining the spade to the facade and having a slight
cut-slope avoids the risk of soil digging by the water downstream of the spade. The distance
between the spade and the footing is a function of the width of the drainage jacket. The
slope must avoid a decompression of the ground at the level of the foundation.
Permanent measurement / Heavy work.
Construction measure.
Individual measurement.
Measure that can be generalized to future constructions.
Requires the intervention of a professional (work authorization).
Limit of use
Nothingness
Application fields
For fast, even torrential floods with high water levels.
Accompanying measures
Nothingness
9頁
Ensure the safety of the occupants and the residents in case of maintenance in the premises
Measure 7 Prevent the Flotation of Objects Interest of Measurement
Interest of the measure
Reserves of firewood and light buildings can be washed away. They then become dangerous
floating objects that can strike the lifeguards and damage walls, cofferdams, patio doors inwaterfront buildings.
Conditions of implementation11

Objects likely to be carried away by the waves must be protected from the current. The
firewood reserves can be covered with a tarpaulin firmly anchored to the ground. Heaps ofwood can be held with straps securely stretched and anchored to the ground.

※（COMMUNE DE BOUJAN-SUR-LIBRON, Préfecture de l'Hérault 2011）9 頁より作成。
Permanent or temporary measure / Light work.
Measure of construction, development.
Individual measurement.
Limit of use
The attachment points of the tarpaulins or straps must withstand the force of the water(sealed hooks). The protection by a tarpaulin will present the interest of keeping your wood
sheltered from the rain.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measuresnothingness

Measure 8 Materialize the footprints of in-ground pools and basins
Interest of the measure

12In case of flood, pools and pools are no longer visible due to the turbidity of the water.
There is therefore for rescuers, a significant risk of drowning because of the significant
depth. This involves installing a marking device to identify the footprint of pools and ponds.
Conditions of implementation
Beacons of color and shape facilitate their identification delimit the perimeter of pools andponds. Beacons must be permanently attached.
Permanent measurement / Light work.
Measure of construction, development.
Individual or collective measure.
Measure that can be generalized to future constructions.
Limit of use
Nothingness
Application fields
For floods with high water levels.
Accompanying measures
Since January 1, 2004, newly constructed private individual or collective burial private pools
must be equipped with a safety device that meets specific safety standards.

16- Title II of 1st Book of the Construction and Housing Code, Chapter VIII-Safety ofswimming pools.
10 頁

2. Limit damage to property
Limit the penetration of polluted water into the building
Measure 9 Strengthen the stowage of oil tanks and bottles
Interest of the measure

13

The tanks of gas or fuel, in case of bad anchoring, are raised under the effect of theArchimedean thrust exerted by the water and start to float. They can then be swept awayby the current, becoming dangerous floating objects. In addition, their content can spread,either because it has turned over, or because the connection pipes are disengaged from thetank.
Such a hydrocarbon pollution can permanently damage a whole set of houses given thesmell of fuel that durably impregnates the masonry.
Conditions of implementation
This measure is subject to a standard that takes into account the risk of flooding17. It may
be advisable to keep the tank sufficiently filled to improve resistance to buoyancy.
Permanent measurement / Heavy work. Management measure.
Individual or collective measure. Measure that can be generalized to future construction.
Requires the intervention of a professional.
Limit of use
Masonry blocks in which tank anchors and strapping are attached must be sufficiently
strong. In areas identified as seismic, it is best to bury the tanks.
Application fields
All floods, whether fast or slow, as soon as the water height becomes significant (a few tensof centimeters)
Accompanying measures
It is essential to complete the anchoring device by installing valves and shut-off valves.
These cut-off devices can be installed on the tank, or on the connections to the housing
networks. They must be clearly identified by the individual.
（著作権の保護のため、（著作権の保護のため、挿入されている写真を削挿入されている写真を削除しています。
）

除しています。
）

Tank lifted by the water.

Polluted hedge

Source: MEDD-DPPR-Floods in Bellegarde- December 2003
17- Order of the Ministry of Industry dated 30 July 1979, concerning the technical and safety
14

rules applicable to fixed liquefied hydrocarbon storage facilities not subject to the legislationof classified installations or public buildings. It was amended by order of 5 February 1991 andpublished in the OJ on 27 February 1991.
11 頁

Limit the penetration of water into the building
Measure 10 Install cofferdams (flood barriers)
Interest of the measure
Cofferdams are flood barriers that are installed on doors and windows or away from thedwelling to minimize or delay water penetration, allowing more time to elevate or movefurniture. If it is impossible to prevent water from entering, the cofferdam avoids the entryof sludge, allowing only filtered water to flow, which will facilitate cleaning.
Conditions of implementation
System adaptable to any type of opening. Their storage must be adapted in order not toalter their performance. Temporary measure / Light work. Measure of construction,
development. Individual or collective measure.

※（COMMUNE DE BOUJAN-SUR-LIBRON, Préfecture de l'Hérault 2011）11 頁より作成。
Limit of use

15

They may have trouble resisting a very fast flood with a lot of current. Their effectivenessis limited to a water depth of one meter. They must be able to be spanned by an adult toallow a possible evacuation of the occupants. In addition, above this height, it is necessary
to let water into the house to balance the hydraulic pressure. These devices may require alonger or shorter implementation time. The effectiveness of cofferdams, their sealing
potential depends on the adhesion of the device to the walls. It is therefore a function of
the nature of the walls, and the quality of the joints and fixings. Additional measures may
be necessary to prepare the surface of the walls and allow better sealing, to improve thesquareness with the ground.
Application fields
All floods, whether fast or slow, regardless of the water level. Their effectiveness is limited
to water depths of 1 meter.
Accompanying measures
Non-return valve, displacement of the air ducts or temporary cover for air vent, possible
pump, treat the penetrating cracks, shutter of the ducts of the networks.

12 頁
MEASURE 11 TO OBTAIN TEMPERATURE DEVICES BY VENTILATION AND
VENTILATION PLUGS, ACCESS TRAPPERS TO SANITARY VACUUMInterest of the measure
These openings located in the walls essential to the comfort of the housing and its
wholesomeness are privileged water entries in case of flood. To limit the penetration ofwater and fines in the housing, it is essential to close these devices. However, it is alsoessential to remove the protections when relocating to the premises (risk of gas poisoning).
Conditions of implementation
Different devices exist. It can be grid or filter to block the floating objects and as much as
possible, while letting the water pass. Lids can be installed on vents and vents. They are
fixed by a simple clip or are integrated into a frame.
Temporary measure imperative! / Light work Development measure. Individual
measurement.
Limit of use

16

This "closure" must remain temporary. In fact, to facilitate the drying out, to allow themaintenance of the crawl space and the relocation in the places (in good conditions ofwholesomeness), the covers or any other device must be removed. Too much water pressure
could result in scouring and damage to the structure itself. It is therefore recommended tochoose grids or filters for the crawl space access hatches. These grilles must be removable
to allow the maintenance of the crawl space when possible.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Cofferdams, clogging of ducts of networks.

MEASURE 12
CLOSING THE SHEETS OF THE NETWORKSInterest of the measure
The electricity, telephone or sanitation networks, or drinking water supply that come fromthe public domain, are laid in ducts that are possible water inlets in case of flood. Water
then seeps through the eyes.
Conditions of implementation
Corks exist. They will ensure you a good seal of these looks.
Permanent measurement / Light work.
Management measure. Individual measurement. Requires intervention of a professional.
Limit of use
nothingness
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Cofferdam, lid for air vent, penetrating cracks to treat.

13 頁
17

MEASURES 13 PROTECT GREENHOUSES AND VERANDAS (ALL GLASSSURFACES)Interest of the measure
Verandahs and greenhouses consist of aluminum profiles or wooden uprights that are easily
twisted or broken by water. Glazing can also break under pressure. The water can theneasily spread in the housing. Most often, it is best to sacrifice them and recommend their
opening by installing the cofferdam on the inner door of the greenhouse.
Conditions of implementation
Install cofferdams to protect the structure and windows.
Temporary measure / Light work. Management measure. Individual measurement.
Limit of use
In some cases, it is futile to want to protect the porch and the house. It is better than toinstall the cofferdam on the door of communication between the veranda and the housing,to sacrifice the veranda to better protect the housing.
Application fields
Low flood, less than one meter high, little current.
Accompanying measures
Remember to temporarily seal the other entries possible such as air vents. The use of apump can also complete this device.

MEASURE 14 USE A PUMP TO REJECT WATER TO THE OUTSIDEInterest of the measure
A pump helps to control the water level inside the house. It allows in particular to control
the infiltration around the cofferdams and under the building. It also allows faster removal
of water after flooding, and thus facilitates cleaning.
Conditions of implementation
Purchase and instructions for use, instructions for use.
Individual or collective measure. Temporary measure / Light work.
Limit of use

18

It is important not to pump too fast at the end of the flood. The soil is still waterlogged andthe use of a pump could cause differential settlements around the housing that could
destabilize the structure. Pumps used to control water infiltration must not run onelectricity, which is cut off during the flood. Its use is recommended but it must be welldimensioned and installed at a low point. The evacuation of water must be provided. Its
action is harmful when there is too much water (balancing the differential pressure). So it
can be useful to pump to control the level, but not necessarily remove everything.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Install a peripheral drain, cofferdam, cover, any device to limit the penetration of water.

14 頁
MEASURE 15 INSTALLING ANTI-RETURN VALVESInterest of the measure
Water can flow through drains, toilets, and sewer lifts. The water is then contaminated anddirty. The home can then experience problems of nauseating odor and health that causesignificant cleaning difficulties. It is therefore a priority to prevent this dirty water fromentering.
Conditions of implementation

19

Lift the plate up and check for the presence or absence of the backflow preventer. Different
models exist. Provide annual maintenance of the valve.

※（COMMUNE DE BOUJAN-SUR-LIBRON, Préfecture de l'Hérault 2011）14 頁より作成。
Permanent measurement / Light work. Management measure. Individual measurement.
Requires intervention of a professional.
Limit of use
Too many valves on the same network can allow the latter to put overpressure in case offlood (water entering large quantities in the pipes not sufficiently dimensioned). Pipes canthen jump on the streets. The dirty water will then come in through walls, windows anddoors. Regular maintenance by a building professional is essential.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Accompanying measures: cofferdam, cover for air vents. The owner will have to check thecapacity of the pipe to resist the overpressure created.

Choose equipment and construction techniques
20

MEASURE 16 USE THERMAL INSULATION WITH LOW WATER RETENTION(AVOID GLASS WOOL)Interest of the measure
Hydrophilic insulators (wool or expanded polystyrene) lose their insulation quality withwater or mud. They gorge themselves with water and settle in the bottom of the partitions.
An insulator such as extruded polystyrene (closed cell) will retain its properties muchbetter, and need not be changed.
Conditions of implementation
Permanent measurement / Heavy work. Requires intervention of a professional.
Construction measure. Individual measurement.
Limit of use
Very technical work, not always possible. If the removal of old insulation is possible, theinstallation of new materials can be difficult.
Application fields
Fields of application: All floods, whether fast or slow, regardless of the water level.
Accompanying measuresnothingness

15 頁
MEASURE 17 AVOID THE PARTITIONS IN PLASTERBOARD
Interest of the measure
There are several types of drywall. For housing in a flood zone, prefer water-resistant
plasterboard (green) that will withstand short-term floods and should not be systematicallychanged. The horizontal installation of the plates will allow that in case of flood of lowheight, only that located at the bottom is touched and therefore replaced.
Conditions of implementation
Install "water-repellent" plasterboard partitions (blue or green plates) on a metal or wood
frame or double the existing partitions with water-resistant plasterboard
Permanent measurement / Heavy work. Construction measure. Individual measurement.
Requires intervention of a professional.
21

Limit of use
The materials composing the partitions have water reactions, both in the short term andover time, which are still poorly evaluated. In the case of very long immersion, even awaterproof plasterboard will be damaged.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Take advantage of the change of the partitions to take some measurements on the electrical
network.

MEASURE 18 INSTALL PVC JOINERYInterest of measurement
PVC exterior joinery is insensitive to water. As they are composed of profiles, however, wemust pay attention to the possible entry of water into the carpentry. However, PVC cansuffer from exposure to certain pollutants carried by water.
Conditions of implementation
Have PVC exterior joinery with a galvanized steel core. This steel core makes the window
more solid. It is mandatory to file a declaration of work in the town hall.
Permanent measurement / Heavy work. Construction measure. Individual measure
Requires intervention of a professional.
Limit of use
Conditions of use: Limit of use: As they are composed of profiles, however, it is necessary
to pay attention to the possible entrance of water through the joinery. However, PVC cansuffer from exposure to certain pollutants carried by water.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measuresnothingness

22

16 頁

3. Facilitate the return to normal
This is mainly to limit the time to repossess the premises under satisfactory sanitary andsecurity conditions.

Facilitate the restarting of equipment
Technical equipment such as heating or electricity is particularly vulnerable to the effects ofwater. They are essential for a good relocation in places as soon as the water is removed.
Reclamation work can be heavy and expensive. A boiler is most often irreparable after a flood.
Stagnant water in an electrical pipe makes it dangerous and unusable.
MEASURE 19 REMOVE THE ELECTRIC PANEL OUT OF WATER
Interest of the measure
Avoids a possible replacement. Avoids malfunctions like short circuits.
Conditions of implementation
Place them 50 cm above the level of the highest known water line, or even upstairs.
Permanent measurement / Heavy work
Development measure
Individual measure
Requires professional intervention
Limit of use
None. It must be remembered, however, that grid operators will cut off power supply
throughout an area as soon as the presence of water is reported. Even a house that is not
flooded can be deprived of electricity.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Downstream electrical network.
MEASURE 20 CREATING A DOWNLINK ELECTRICITY NETWORKInterest of the measure

23

Facilitates the evacuation of water in the lines, avoids the stagnation of the water and thus
the malfunctions, avoids having to replace them and thus to deteriorate (to open) the
partitions.
Conditions of implementation
The networks must come down from the ceiling and the upper parts of the dwelling. The
connection to public networks must therefore be installed at the ceiling level.
Permanent measurement / Heavy work. Management measure. Individual or collective
measure for buildings. Requires intervention of a professional.
Limit of use
The wiring and the circuit must not contain siphons.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measures
Put the electrical panel out of the water, raise the electrical outlets above the PHEC (valid
for frequent and small floods, does not require a major modification of the electrical
network).
17 頁
MEASURE 21 CREATING A SEPARATE ELECTRICAL SYSTEM FOR FLOODEDPARTSInterest of the measure
Allows to limit the damage to the flooded area (no rise by capillary water), allows to recoverelectricity in an area saved from the flood (the circuit having suffered damage for example
on the ground floor is turned off by a circuit breaker), facilitates drying, cleaning thedamaged area, allows reinstallation in normal conditions of comfort (heating, electricity ...)
can repair a slower pace, the comfort being present in some areas of the house.
Conditions of implementation
Separate networks must be made by differentiating between flood and non-flood zones (egone per floor). Install a circuit breaker on the flooded part of the electrical network(allowing it to be de-energized while supplying the non-flooded area!)
Permanent measurement / Heavy work. Management measure. Individual or collective
measure for buildings. Requires intervention of a professional.
Limit of use
24

The division of the network into different zones must be reflected, the known flood scenario
and integrate into the latter.
Application fields
All floods, whether fast or slow, whatever the water level.
Accompanying measures
Turn off the electrical panel, install 30 mA differentials on the electrical network of theflood zone (very sensitive circuit breakers that will ensure greater safety when returning
electricity).
MEASURE 22 OFF WATER HEATING FACILITIES, VENTILATION AND AIR
CONDITIONING PLANTS
Interest of the measure
These equipments are expensive and long to replace. They will facilitate the drying out of
housing, especially walls. Such a measure avoids malfunctions due to humidity or the entryof water into this equipment.
Conditions of implementation
Install this equipment in non-floodable areas of the dwelling, such as the attic or the attic
Permanent measurement / Heavy work. Management measure. Individual or collective
measure for buildings. Requires intervention of a professional.
Limit of use
In case of suspended installation, it is necessary to take seismic precautions in the areas
concerned by this risk. It is also possible to keep the current installation with some
adaptations, such as waterproof insulation. It is also possible to modify only its positioning.
Connections to the network will have to be considered. The PPR will be able to choose
between these three alternatives.
Application fields
All floods, whether fast or slow, regardless of the water level. Even low height can have asignificant impact on these facilities if they are affected.
Accompanying measures
None.

18 頁

Facilitate cleaning
25

MEASURE 23 INSTALL DOORS AND DOORS-WINDOWS WITH LOW HEIGHTInterest of the measure
The absence of a threshold facilitates the evacuation of cleaning water from one room toanother, from one room to the outside.
Conditions of implementation
Permanent measurement / Heavy work. Management measure. Individual measurement.
Requires the intervention of a professional (work authorization)
Limit of use
None.
Application fields
For floods with high water levels.
Accompanying measuresnothingness

Facilitate drying
MEASURE 24 INSTALLING A PERIPHERAL DRAIN
Interest of the measure
The underground drains, placed on the periphery of the building, allow a faster drying of
the walls of the house. Indeed, the water will be collected and evacuated far from the walls,
avoiding that it stagnates and that humidity settles.
Conditions of implementation
Make a trench all around the house, insert the drain. Consider the nature of the soil, andthe slope of the natural terrain. Provide for connection to the sewage system.
Measure to adapt to the nature of the soil. Permanent measurement / Heavy work.
Management measure. Individual or collective measure for buildings. Requires
intervention of a professional.
Limit of use
This may be unnecessary in clay soils that are very impervious to water.
Application fields
All floods, whether fast or slow, regardless of the water level.
Accompanying measuresNone.
26