/

/

/

Des alertes qui atteignent le dernier foyer.

Les alertes nationales oublient souvent les petites vallées et les villages, et arrivent par des canaux que tout le monde ne reçoit pas. Un système communautaire d’alerte précoce, fait de pluviomètres et de limnimètres, de seuils locaux, de sirènes et de messages, relié au service national, donne aux habitants les minutes dont ils ont besoin pour se mettre à l’abri.

Industrie

Communautés

Mesures

4

Sources citées

5

1. Communautés · Alerte précoce communautaire

   Minutes that matter

   Flash floods in small valleys can rise in less than an hour, and national warnings often miss them or arrive in ways not everyone receives. The global disaster risk framework asks for early warning that is people-centred and reaches everyone. A community system gives people the minutes they need.

2. Ce qui est mesuré

   Rain upstream, rivers rising

   Rain gauges in the upper catchment and river gauges upstream of the community report every few minutes, faster when levels rise. Each gauge sits above past flood marks on a secure pole, with its own solar panel and battery, so it keeps reporting during the event.

   Instruments

   Rain gauges · River level gauges

3. Le nœud de base

   Local thresholds, local alerts

   The node at the community centre applies thresholds agreed by the community and the national service. When rain or river crosses them, it sounds sirens, sends messages and radio announcements, and records every alert and every acknowledgement from focal points.

4. Radio et liaisons

   Low-power radio, cellular and sirens

   Gauges reach the community gateway over a long-range, low-power link. The node exchanges alerts with the national service in the common alerting protocol over cellular, and community radio and sirens reach the households without phones, so nobody depends on a single channel.

   Liaisons

   LoRaWAN · Public cellular · VHF/UHF

5. Comment ça marche

   From a rain gauge to safe ground

   A storm stalls over the upper valley. Rain gauges report intense rainfall, then the river gauge climbs past its first threshold. The node sounds the sirens and sends messages; focal points check on elderly neighbours, families move to the school on the hill, and the national service sees the alert.

6. De la commande à l’exploitation · Commande

   Scope with the community and the service

   The scope brings together the community, the local authority and the national warning service: the hazards, past floods, who must be warned, how and how fast. Nexus Observatory Inc. returns the gauge plan, thresholds approach, dissemination design, training and a price for building and for each year.

   Planifier un déploiement

7. De la commande à l’exploitation · Relevé

   Map the risk together

   Crews walk the catchment with community members: flood marks and stories of past events, gauge sites safe from the floods they measure, gateway and siren positions, and the households hardest to reach. The risk map is drawn with the community.

8. De la commande à l’exploitation · Autorisations

   Land, radio and roles

   Land owners approve gauge sites, radio and siren use are licensed or registered, and the community agrees who receives alerts, who sounds sirens and who checks on vulnerable neighbours. The national service agrees how local alerts relate to its own warnings.

9. De la commande à l’exploitation · Fabrication

   Build and test the chain

   Gauges, radios, the gateway, node, sirens and message service are configured and tested together as one chain, from a simulated rise to a siren and a message. Nodes are enrolled with their identities and community volunteers join the tests. Nothing ships until the whole kit has passed its tests together.

   Ouvrir le configurateur de stations

10. De la commande à l’exploitation · Installation

    Install with volunteers

    Crews and volunteers install gauges on secure poles above flood marks, the gateway and node at the community centre, and sirens where every household can hear them. Every part is photographed, and volunteers learn how to check each one. Crews follow the site safety plan throughout the work.

11. De la commande à l’exploitation · Mise en service

    Commission with a drill

    Each node proves its identity, gauges are checked against staff gauges and manual readings, and the community runs a full drill: alert, siren, messages, acknowledgements and movement to safe places. Response times are recorded and thresholds reviewed. Acceptance is recorded with the owner before handover.

12. De la commande à l’exploitation · Exploitation

    Warn and respond

    The community and the national service see rain and river levels live. Alerts go out by siren, message and radio when thresholds are crossed, focal points confirm that households have heard, and every event is recorded for the next review.

13. De la commande à l’exploitation · Maintenance

    Drill every season

    Gauges are checked by volunteers before each rainy season, drills are repeated, thresholds are reviewed after every event, new volunteers are trained, and software updates arrive remotely in rings. Every change is kept with the system record. Maintenance history stays with each site for its whole life.

    Réserver des services sur le terrain

14. Produits de données

    For every household

    The community and local authority receive rain and river levels; every household receives alerts by siren, message and radio; focal points and the national service receive alert and acknowledgement records; the community and funders receive drill and event reviews, each tied to the place and time.

    Voir les produits de données

15. Preuves

    People-centred, on record

    The system follows the four parts of the international early warning checklist and the people-centred approach of the global disaster risk framework. Rivers are gauged to hydrological practice, rain to the instrument guide, and alerts use the common alerting protocol. Every alert, drill and response is recorded.

    Référentiels

    WMO-No. 1150 · Sendai Framework for Disaster Risk Reduction 2015-2030 · WMO-No. 168 · WMO-No. 8 · ITU-T X.1303

16. Ce que vous obtenez

    Détection en tant que service

    Des réseaux d’observation conçus, installés, exploités et entretenus moyennant des frais mensuels : stations météorologiques, hydrométéorologiques, de qualité de l’air, sismiques et environnementales, avec données livrées sous licence. Fourni sous forme de service géré et licence de données, pour agencies, utilities, municipalities, insurers, agribusiness. Scale: Global, multi-site, per-site pricing.

    Parler aux ventes

17. Étape suivante

    Planifier avec nous : alerte précoce communautaire

    Tell us the site, the measurements and the rules it answers to. We reply with a survey proposal, a design and a scope for community early warning. An engineer replies with a survey proposal and a scope, and the plan grows from one site to the network you need, at your pace.

    Planifier un déploiementOuvrir le configurateur de stationsOuvrir le Studio

01Le lieu et ses dangers

Où il fonctionne, et ce qui peut mal tourner.

Operating contextThe global disaster risk framework calls for people-centred early warning, and the international checklist sets out its four parts: risk knowledge, monitoring, dissemination and response capability. Rivers are gauged to hydrological practice, rainfall to the instrument guide, and alerts are exchanged in the common alerting protocol so every channel can carry them.

Dangers

• Flash floods in small valleys with no national gauge
• Warnings that never reach households without phones
• Thresholds set far away without local knowledge
• Gauges washed away in the floods they warn of
• Volunteers who leave and take the skills with them

02Ce qu’il faut mesurer

Quoi, où, à quelle fréquence, et selon quelles règles.

Chaque mesure indique où elle est prise, à quelle fréquence, et la norme ou la réglementation publique qui la fonde. Les numéros de la colonne des sources ouvrent la source citée plus bas.

03La pile d’observation

D’un module de base à un réseau.

Les mêmes briques à chaque échelle : des instruments et un nœud de base, un site avec sa radio, une flotte exploitée comme un tout, et un réseau fédéré sur le protocole ouvert.

1. 01

   Unité de base

   A gauge: a rain or river sensor on a low-power radio with its own battery and solar panel.

   Build a station →
2. 02

   Site

   A community: gauges in the catchment, a gateway, a node at the community centre, sirens and a message service.

   Plan a site →
3. 03

   Parc

   Many communities in a basin linked, so an upstream rise warns those downstream.

   Managed offers →
4. 04

   Réseau

   Community systems exchange alerts with the national warning service in the common alerting protocol.

   The open protocol →

• 01Limnimètre
• 02Station météo compacte
• 03Terminal LPWAN
• 04Passerelle LoRaWAN
• 05Micronœud (Nano)
• 06Modem/routeur cellulaire
• 07Champ solaire
• 08Poteau

Radio et liaisons

LoRaWAN

Gauges in the catchment reach the community gateway over a long-range, low-power link.

Radio et liaisons

Réseau mobile public

The node sends alerts and data to the national service and phones over cellular.

Radio et liaisons

Radio VHF et UHF

Community radio and sirens reach households without phones.

Edge computeThe node applies thresholds agreed with the community and the national service, raises alerts when rain or river crosses them, triggers sirens and messages, and records every alert and acknowledgement.

PowerGauges run on small solar panels and batteries; the node and sirens have batteries that outlast a storm’s power cut.

04Comment ça marche

De l’instrument au produit.

Le parcours d’une observation, niveau par niveau, avec l’interface de chaque liaison et une nomenclature en dessous ; puis comment ce nœud devient un site, une flotte et des réseaux fédérés.

05De la commande à l’exploitation

Chaque étape, du premier appel à un site en service.

La même équipe et le même dossier portent le travail, du cadrage à la maintenance.

1. 01 Order

   Scope with the community and the service

   The scope brings together the community, the local authority and the national warning service: the hazards, past floods, who must be warned, how and how fast. Nexus Observatory Inc. returns the gauge plan, thresholds approach, dissemination design, training and a price for building and for each year. 35

2. 02 Survey

   Map the risk together

   Crews walk the catchment with community members: flood marks and stories of past events, gauge sites safe from the floods they measure, gateway and siren positions, and the households hardest to reach. The risk map is drawn with the community. 2

3. 03 Permits

   Land, radio and roles

   Land owners approve gauge sites, radio and siren use are licensed or registered, and the community agrees who receives alerts, who sounds sirens and who checks on vulnerable neighbours. The national service agrees how local alerts relate to its own warnings.

4. 04 Build

   Build and test the chain

   Gauges, radios, the gateway, node, sirens and message service are configured and tested together as one chain, from a simulated rise to a siren and a message. Nodes are enrolled with their identities and community volunteers join the tests. Nothing ships until the whole kit has passed its tests together.

5. 05 Install

   Install with volunteers

   Crews and volunteers install gauges on secure poles above flood marks, the gateway and node at the community centre, and sirens where every household can hear them. Every part is photographed, and volunteers learn how to check each one. Crews follow the site safety plan throughout the work.

6. 06 Commission

   Commission with a drill

   Each node proves its identity, gauges are checked against staff gauges and manual readings, and the community runs a full drill: alert, siren, messages, acknowledgements and movement to safe places. Response times are recorded and thresholds reviewed. Acceptance is recorded with the owner before handover. 3

7. 07 Operate

   Warn and respond

   The community and the national service see rain and river levels live. Alerts go out by siren, message and radio when thresholds are crossed, focal points confirm that households have heard, and every event is recorded for the next review. 4

8. 08 Maintain

   Drill every season

   Gauges are checked by volunteers before each rainy season, drills are repeated, thresholds are reviewed after every event, new volunteers are trained, and software updates arrive remotely in rings. Every change is kept with the system record. Maintenance history stays with each site for its whole life. 5

06Produits de données et intégration

Ce qu’il fournit, à qui, et dans quels systèmes.

Produits de données

• Rain and river levelsThe community and the local authority
• Alerts by siren, message and radioEvery household
• Alert and acknowledgement recordsFocal points and the national service
• Drill and event reviewsThe community and funders

Intégration

• National warning serviceLocal alerts and data are exchanged in the common alerting protocol.
• Message servicesAlerts reach phones through the channels people use.
• CollectivitéEvent records feed the authority’s emergency planning.

Exchanged through CAP 1.2, OGC SensorThings API, WMO WIS 2.0.

07Questions des acheteurs

Avant de cadrer votre projet.

Who sets the thresholds?

The community and the national service together, reviewed after every event.

What about households without phones?

Sirens and community radio reach them, and focal points check on them.

Will gauges survive a flood?

They are sited above flood marks on secure poles.

Does it replace national warnings?

No. It adds local detail and reaches the last household.

08Ressources

Les sources de cette page.

Normes, réglementations et lignes directrices publiques, citées là où elles s’appliquent. Chacune ne s’applique que dans sa juridiction ou son champ.

1. 1WMO-No. 8: Guide to Instruments and Methods of ObservationWorld Meteorological Organization
2. 2WMO-No. 168: Guide to Hydrological PracticesWorld Meteorological Organization
3. 3WMO-No. 1150: Multi-hazard Early Warning Systems: A ChecklistWorld Meteorological Organization · 2018
4. 4ITU-T X.1303: Common alerting protocol (CAP 1.2)International Telecommunication Union
5. 5Sendai Framework for Disaster Risk Reduction 2015-2030United Nations Office for Disaster Risk Reduction · 2015

09Voir aussi

Cas d’usage et solutions.

10Communautés : domaines spécialisés

Les autres domaines de cette industrie.

Présentez-nous le site.

Planifiez un déploiement, configurez une station, modélisez-la dans le Studio ou parlez à l’équipe commerciale. Le formulaire indique qui reçoit vos coordonnées.