Volumetric Water Benefit Accounting (VWBA)
Project type: Hydrological MRV integration for water retention and recharge quantification
Partners: VWBA 2.0 Framework Integration
Overview
Aquascope is incorporating VWBA 2.0 (Version A-4, A-5, A-11) directly into its predictive hydrology and water quality forecasting platform. This allows fully digital measurement of water retention, flood attenuation, recharge and infiltration, hydroperiod extension in wetlands, and volume captured via natural restoration. The work supports Water Benefit Certificates (WBCs) and aligns with both global water accounting frameworks and the EU's nature credit roadmap.
Why This Matters
Water insecurity is now a key driver of climate resilience, ecological function, agricultural stability, biodiversity recovery, and corporate water stewardship (SBTN, CDP, CSRD). Yet there is no integrated, high-resolution MRV system that links water retention, quality, carbon cycling, and biodiversity into a unified engine. Aquascope provides the first such system.
Technical Pillars
VWBA Indicator Integration (A-4, A-5, A-11)
We implement three official VWBA methods: A-4 Recharge Method (increased groundwater recharge from land cover change, wetlands, peatland rewetting), A-5 Volume Captured (quantification of surface water retained in restored wetlands and floodplains), and A-11 Inundation (quantifies extension of hydroperiod and shallow water retention critical for wetland habitat and carbon accumulation).
Hydrological Modelling Integration
We fuse VWBA with INCA hydrology and nutrient models, real-time sensor networks, Sentinel-1 SAR lake extent mapping, seasonal hydrograph reconstruction, and Karst groundwater inflow modelling. This allows high-fidelity measurements of water storage changes and dynamic responses to restoration.
Water Benefit Certificates (WBC) Engine
We generate m³ water benefit outputs, annual certification volumes, confidence intervals using model uncertainty quantification, and real-time dashboards for project developers and auditors. These outputs follow VWBA principles, ISO 14064-2 MRV discipline, and future EU water-related nature credit definitions.
Linking Water Benefits With Carbon & Biodiversity
Water retention affects carbon fluxes (peat dynamics, SOC stability) and habitat structure, and therefore influences carbon sequestration (wetlands, peatlands, grasslands), methane flux variation, and habitat quality and biodiversity uplift.
Outputs
- Automated VWBA dashboards
- Water Benefit Certificate quantity (m³) per year
- Hydrological change maps (inundation, recharge, retention)
- API endpoints for corporate water stewardship frameworks
- Integrated water-carbon-biodiversity co-benefit reporting