Forest Leakage Risk Calculator
Our forest carbon sink calculator computes forest leakage risk accurately. Enter measurements for results with formulas and error analysis.
Formula
Net Credits = Gross - Total Leakage
Each leakage type is a percentage of gross reductions. Net = gross minus total leakage. Financial impact = leakage x price.
Worked Examples
Example 1: REDD+ Leakage Assessment
Problem: 50,000 t CO2e gross. Activity 15%, market 10%, ecological 5%. $12/t.
Solution: Activity = 7,500 t\nMarket = 5,000 t\nEcological = 2,500 t\nTotal = 15,000 t (30%)\nNet = 35,000 t\nLost = $180,000
Result: Net = 35,000 t | 30% | -$180,000
Example 2: Low-Leakage Project
Problem: 80,000 t, 5% activity, 3% market, 2% ecological. $18/t.
Solution: Total = 8,000 t (10%)\nNet = 72,000 t\nLost = $144,000
Result: Net = 72,000 t | 10% | -$144,000
Frequently Asked Questions
What is carbon leakage in forest projects?
Carbon leakage occurs when emission reductions from a forest project are offset by increased emissions elsewhere. If protecting forest from logging causes loggers to move to adjacent unprotected forest, the net climate benefit is reduced. Leakage is a fundamental challenge in carbon offset markets. All major crediting standards require projects to estimate and deduct leakage from claimed reductions to ensure credits represent real additional climate benefits.
What is activity shifting leakage?
Activity shifting leakage occurs when deforestation activities are physically displaced outside the project boundary. If a REDD+ project prevents farming in a protected forest, farmers may clear forest elsewhere. This is the most direct and measurable form of leakage. Studies find rates of 10 to 50 percent depending on alternative land availability and community mobility. Mitigation includes providing alternative livelihoods and extending project boundaries.
What is market leakage?
Market leakage occurs when restricting forest product supply in one area causes prices to rise, incentivizing increased production elsewhere. If conservation removes timber from the market, buyers seek alternative sources, potentially driving deforestation in other regions. Economic modeling suggests market leakage ranges from 5 to 40 percent depending on supply and demand elasticity. Some standards use default market leakage factors by product type.
What is ecological leakage?
Ecological leakage refers to biophysical carbon losses outside the project boundary as an indirect consequence of the intervention. Protecting forest may alter hydrology, causing downstream forests to experience water stress. Fire management in one area might redirect fire to adjacent lands. Ecological leakage is the most difficult to quantify and is typically estimated at 0 to 10 percent. While smaller than other types, it should not be ignored.
How do carbon standards handle leakage?
The Verified Carbon Standard requires approved methodologies with leakage modules, typically deducting 10 to 40 percent from gross reductions. The CDM requires leakage assessment in project design documents. Gold Standard requires leakage assessment under safeguarding principles. Projects can demonstrate lower leakage through alternative livelihood programs or expanded monitoring. Excessive leakage can make projects non-viable for crediting.
How can projects minimize leakage?
Provide alternative livelihoods to reduce displacement incentive. Expand project boundaries to cover potential displacement areas. Establish leakage monitoring belts around the boundary. Use jurisdictional approaches covering larger landscapes. Integrate sustainable forestry that maintains timber supply while protecting carbon stocks. These strategies can reduce leakage rates significantly.