To calculate the Normalized Burn Ratio (NBR), subtract the SWIR (Shortwave Infrared) value from the NIR (Near Infrared) value and divide the result by the sum of NIR and SWIR. This index helps assess vegetation health and burn severity in a given area.
The Normalized Burn Ratio (NBR) Calculator is a critical tool for environmental analysis, particularly in assessing wildfire impact and vegetation recovery. By using the difference and sum of NIR and SWIR bands, NBR provides a reliable measure of burn severity and landscape condition.
Formula
Contents
NBR = (NIR − SWIR) / (NIR + SWIR)
| Variable | Description |
|---|---|
| NBR | Normalized Burn Ratio |
| NIR | Near Infrared Band Value |
| SWIR | Shortwave Infrared Band Value |
Solved Calculations
Example 1: NIR = 0.8, SWIR = 0.2
| Step | Value |
|---|---|
| NIR − SWIR | 0.8 − 0.2 = 0.6 |
| NIR + SWIR | 0.8 + 0.2 = 1.0 |
| NBR | 0.6 / 1.0 = 0.6 |
Example 2: NIR = 0.7, SWIR = 0.3
| Step | Value |
|---|---|
| NIR − SWIR | 0.7 − 0.3 = 0.4 |
| NIR + SWIR | 0.7 + 0.3 = 1.0 |
| NBR | 0.4 / 1.0 = 0.4 |
What is Normalized Burn Ratio (NBR) Calculator?
The Normalized Burn Ratio (NBR) Calculator is a specialized tool designed to analyze and quantify burn severity in vegetation after a wildfire.
It utilizes satellite imagery data, such as from Sentinel-2 or Landsat, to calculate the NBR values, providing critical insights into the impact of fires on ecosystems and landscapes.
NBR is calculated using near-infrared (NIR) and shortwave infrared (SWIR) bands, following a specific formula to detect burn severity and vegetation health. This tool simplifies the process by allowing users to input satellite data and obtain accurate results.
It is particularly useful for environmentalists, researchers, and climate analysts working on post-fire assessments and creating burn severity maps.
Moreover, the calculator supports advanced metrics like the Differenced Normalized Burn Ratio (dNBR), which highlights changes in burn severity over time.
Whether you are studying wildfire impacts, tracking vegetation recovery, or creating burn severity indices, this tool ensures efficiency and precision.
Final Words:
In summary, the NBR Calculator is a vital resource for evaluating wildfire impacts and monitoring ecosystem health. Its accuracy and versatility make it an indispensable tool for researchers and environmental professionals.
