MRV

MRV (Measurement, Reporting, Verification)

Our MRV Framework

The integrity of a carbon credit depends on a rigorous and transparent MRV system. Our methodology ensures that every tonne of CO₂ sequestered is real, measurable, verifiable, and permanent.

MRV Table – Vachellia nilotica Reforestation with SAP + Marine Fertilizer (per hectare)

MRV category	Indicator	Measurement method	Frequency	Responsible	Reference values (per ha)
Inputs	Water volume for SAP hydration	Waterships operational data	Per mission	Waterships	150–300 L/ha
	SAP quantity applied	Weight + batch record	Per planting	Waterships	8–15 kg/ha
	Marine fertilizer quantity	Weight + batch record	Per planting	Waterships	4–8 kg/ha
	Seedlings supplied	Nursery register + Seahorse Manager	Per mission	Waterships + NGO	200–600 plants/ha
Plantation	Actual planting density	Field count + GPS	Immediate	NGO	200 / 400 / 600 plants/ha
	Planting compliance	Field audit	Immediate	NGO + Waterships	≥95%
Survival (1–3 years)	Survival rate	Transects + geotagged photos	6, 12, 24 months	NGO + Seahorse Manager	60–80%
	Water stress	Soil moisture + observation	6 months	NGO	Low to moderate
Growth	Average height	Manual measurement	Annual	NGO	50–80 cm/year
	Collar diameter	Caliper	Annual	NGO	1.5–2.5 cm/year
	Biomass estimate	*Vachellia nilotica* allometry	Annual	Waterships	200–300 kg/tree
Carbon	CO₂ per tree	Allometry + 3.67 factor	Annual	Waterships	0.35–0.50 tCO₂/tree
	CO₂ per hectare	Density × CO₂/tree	Annual	Waterships	70–300 tCO₂/ha
	Permanence	Survival + growth analysis	Every 5 years	Waterships	High
Co‑benefits	Soil restoration	Organic matter + structure	Every 2 years	NGO	+10–20% OM in 5 years
	Nitrogen fixation	Agronomic indicators	Every 2 years	NGO	Improved fertility
	Local jobs	NGO register	Annual	NGO	5–15 jobs/100 ha
Traceability	Consolidated data	Seahorse Manager	Continuous	Waterships	100% geolocated, audit‑ready

Carbon values (0.35 to 0.50 tCO₂ per tree over 25 to 35 years) are consistent with Vachellia nilotica in semi-arid areas benefiting from high survival rates and improved growth thanks to SAP + marine fertilizer.
“The MRV system is based on field measurements, allometric equations specific to Vachellia nilotica, and complete digital traceability via Seahorse Manager, making it possible to document sequestration in the range of 70 to 300 tCO₂/ha depending on planting density.”
Planting densities (200–600 trees/ha) allow the project to be adapted to water, logistical, and land constraints.
The table is compatible with the MRV requirements of the Equitable Earth, VCS, Gold Standard, and Plan Vivo standards.
The use of Seahorse Manager guarantees complete traceability: water, SAP, fertilizer, plants, geolocation, survival, growth, carbon.

Measurement

We apply internationally recognized scientific protocols to quantify:

Carbon Sequestration

Above‑ground biomass
Below‑ground biomass
Soil organic carbon
Growth rates of native species
Long‑term sequestration modelling

Biodiversity Indicators

Species richness and diversity
Survival rates of planted species
Soil health indicators
Fauna and flora monitoring

Hydrological Benefits

Water retention
Soil stabilization
Reduction of erosion
Watershed restoration

Reporting

All projects undergo structured and transparent reporting cycles.

Reporting includes:

Quarterly progress reports
Geospatial data (GIS)
Geolocated photographic evidence
Carbon dashboards
Biodiversity indicators
Risk monitoring and mitigation updates

All reports are accessible to partners and contributors.

Verification

Independent third‑party auditors verify all project data.

Verification includes:

Field data validation
Review of sequestration models
Risk assessment
Confirmation of carbon volumes
Certification according to international standards

Standards & Frameworks

Our projects align with leading global standards:

Verra VCS
Gold Standard
Plan Vivo
Label Bas‑Carbone (France)
ISO 14064‑2
AFNOR biodiversity frameworks

Carbon Endowment Fund

MRV