Dryad Silvanet Documentation
Get StartedExplore SilvanetPlan a SiteDeploy SilvanetFAQ
  • Dryad Silvanet Documentation
  • Tutorials
    • Get started tutorial (Gen 2)
    • Get started tutorial (Gen 3)
    • Planning tool tutorial
  • Silvanet Suite
    • Explore Silvanet
    • Silvanet Suite (Gen 2)
      • Silvanet Wildfire Sensor (Gen 2)
      • Silvanet Mesh Gateway (Gen 2)
      • Silvanet Border Gateway (Gen 2)
    • Silvanet Suite (Gen 3)
      • Silvanet Wildfire Sensor (Gen 3)
      • Silvanet Mesh Gateway (Gen 3)
      • Silvanet Border Gateway (Gen 3)
    • Silvanet Cloud Platform
    • Silvanet Mesh Network
    • Site Management App
      • User access
      • Dashboard
      • Sites view
      • Site details
        • Device overview
        • Wildfire Sensor data
        • Device info tabs
      • Map view
      • Alert center
      • User Management view
      • User preferences
    • Deployment App
    • Fire detection
  • Site Planning
    • Plan Sites
    • Planning guidelines
      • Deployments stages
      • Scout deployment locations
      • Gateway ratios
      • Gateway ranges
      • Sensor ratios
      • Sensor range
      • Sensor density
    • Coverage planning
      • Planning tool
      • Import KML, KMZ and Shapefiles
      • High density paths
      • Low density areas
      • Connectivity zones
      • Add or move Sensors
      • Export plan
    • Packet editor
  • Silvanet Deployment
    • Deploy Silvanet
    • Deployment guidelines
      • Deployment preparation
      • Border Gateway guidelines
      • Border Gateway scenarios
      • Mesh Gateway guidelines
      • Wildfire Sensor guidelines
    • Deploy Border Gateways (Gen 2/3)
      • Register Border Gateway
      • Mount Border Gateway (Gen 2)
      • Mount Border Gateway (Gen 3)
      • Border Gateway Connectivity Test
    • Deploy Mesh Gateways (Gen 2/3)
      • Register Mesh Gateway
      • Mount Mesh Gateway (Gen 2)
      • Mount Mesh Gateway (Gen 3)
      • Mesh Gateway Connectivity Test
    • Deploy Wildfire Sensors
      • Register Wildfire Sensors
      • Mount Wildfire Sensors
      • Sensor Calibration
      • Sensor normalization
    • Relocate a Silvanet Sensor or Gateway
  • Silvanet API
    • Silvanet API - MQTT Sensor Data Integration
    • Silvanet API - Webhook Integration
  • Silvanet Test Fires
    • Overview
    • Test fire preparation
    • Run test fires
    • Modify fire setups
  • Resources
    • Contact Technical Support
    • Release Notes
    • FAQs
      • General Questions
      • Border Gateway FAQs
      • Mesh Gateway FAQs
      • Wildfire Sensor FAQs
      • Site Management FAQs
      • User Management FAQs
    • Glossary of Terms
    • Status icons
    • Device troubleshooting
    • Firmware updates (FUOTA)
    • Declaration of Conformity (EU)
  • Chandler Burning Index (CBI)
Powered by GitBook

Docs Version

  • Version 4.6.4

Sales Enquiry

  • Contact Dryad Sales

Dryad

  • Dryad.net

© 2025, Dryad Networks GmbH, Eisenbahnstr. 37, 16225 Eberswalde, Germany

On this page
  • Formula
  • Fire Danger Levels
  • Use in Wildfire Management
  • Limitations of CBI
  • Sources and References

Was this helpful?

Export as PDF

Chandler Burning Index (CBI)

The Chandler Burning Index is a metric used to assess fire danger severity based on temperature and humidity. The higher the value, the greater the fire risk.

Formula

The CBI is calculated using the following formula:

CBI = (((110 - 1.373 * RH) - 0.54 * (10.20 - T)) * (124 * 10^(-0.0142 * RH))) / 60

Where:

  • RH: Relative Humidity (%)

  • T: Temperature (°C)

Fire Danger Levels

  • Low (CBI < 50): Fires are unlikely to spread rapidly. Spotting is rare.

  • Moderate (CBI 50–75): Fires can start from most causes and may spread briskly in grasslands.

  • High (CBI 75–90): Fires start easily and spread quickly, especially in dry areas.

  • Very High (CBI 90–97.5): Fires ignite and spread rapidly; spotting is common.

  • Extreme (CBI > 97.5): Fires start instantly, spread uncontrollably, and are highly dangerous.

Use in Wildfire Management

CBI values help guide firefighting readiness, public warnings, and resource deployment. By monitoring changes in relative humidity and temperature, fire agencies can better assess short-term fire risks and adjust alert levels accordingly.

The CBI is particularly useful for:

  • Determining burn bans and fire restrictions based on elevated fire danger.

  • Supporting decisions on allocating aerial and ground firefighting resources.

  • Issuing public fire danger warnings via signage or media during high-risk periods.

  • Assisting land managers in assessing the safety of prescribed burns and controlled fire operations.

Its simplicity and reliance on widely available weather parameters make the CBI especially practical for regions without access to more complex fire modeling tools. However, for comprehensive risk management, it is often used in combination with other indices and local knowledge.

Limitations of CBI

While effective, the CBI does not account for wind, fuel moisture, or fuel load. Integrating it with other tools and local knowledge can improve decision-making.

Sources and References

PreviousDeclaration of Conformity (EU)

Last updated 1 month ago

Was this helpful?

Arthur's Pass Fire Weather Index Calculator
Stillwater Weather: Chandler Burning Index
University of California – Original CBI Documentation (Craig Chandler)