1. What is the i-Tree Model?

The i-Tree model is a suite of tools developed by the USDA Forest Service to quantify the benefits and values of trees. It calculates tree benefits nationally, including carbon sequestration, stormwater reduction, and energy savings.

2. How Does the Calculator Work?

The calculator uses the i-Tree model to estimate:

Where:

• Tree species affects benefit calculations
• DBH (Diameter at Breast Height) is the primary size metric
• Location determines environmental factors

Explanation: The model uses species-specific allometric equations and local environmental data to estimate benefits.

3. Importance of Tree Benefit Calculation

Details: Quantifying tree benefits helps justify urban forestry programs, plan tree plantings, and communicate the value of trees to communities.

4. Using the Calculator

Tips: Measure DBH at 4.5 feet above ground. Select the most accurate species and location type for best results.

5. Frequently Asked Questions (FAQ)

Q1: What is DBH and how do I measure it?
A: DBH is diameter at breast height (4.5 feet above ground). Use a diameter tape or measure circumference and divide by π.

Q2: Why does species matter?
A: Different species have different growth rates, lifespans, and canopy characteristics that affect benefit calculations.

Q3: How accurate are these estimates?
A: Estimates are based on peer-reviewed research but are approximations. Actual benefits may vary by 10-20%.

Q4: Can I calculate benefits for multiple trees?
A: For multiple trees, use the i-Tree software suite which handles inventories of many trees.

Q5: What time period do the benefits cover?
A: Benefits are annual estimates based on the tree's current size and condition.