Volumetric Water Benefit Accounting

Overview

Volumetric Water Benefit Accounting 2.0 is a guidance document from the World Resources Institute and partners for quantifying the volumetric water benefits of water stewardship activities. It provides a six step, principle based approach for identifying activities such as watershed restoration, improved irrigation, and supply protection, and for quantifying, tracking, and communicating the resulting benefits. A water benefit is expressed as a volume of water, for example cubic metres or gallons, provided to or protected within a catchment over a defined period. The guidance is voluntary and covers both direct and enabled volumetric water benefits.

Sources: methodology document · World Resources Institute

01 · Roles

The workflow as an explicit directed graph. In Graph each column is one role, so you can see who acts at each step; every node names the org.broadlistening.policy.block.* def it resolves to plus its input and output record. Data flow switches to a lineage view that makes explicit what data each node needs and makes, with dependency arcs tracing every record back to the node that produced it. Hover to trace, click to inspect; revise edges (dashed) send work back.

03 · Generated lexicon records

The records this methodology compiles to, ready to write to a PDS. The first tabs are the new policy engine records; the ★ claim.activity tab and those after it are reused ATProto Collective Funding Ecosystem records (org.hypercerts.*): the issued hypercert batch, its rights, an example verification attachment and a retirement receipt.

{
  "$type": "org.broadlistening.policy.methodology",
  "code": "VWBA 2.0",
  "name": "Volumetric Water Benefit Accounting",
  "registry": "World Resources Institute (WRI)",
  "sector": "Water replenishment",
  "creditType": "water",
  "status": "active",
  "version": "2.0",
  "scopes": [
    "Water",
    "Volumetric",
    "Replenishment"
  ],
  "aligns": [
    "AWS Standard"
  ],
  "roles": [
    {
      "id": "registry",
      "name": "Standard Registry",
      "permission": "Owns the policy, approves participants, anchors each issuance to its evidence."
    },
    {
      "id": "proponent",
      "name": "Project Proponent",
      "permission": "Registers the project and submits monitoring reports."
    },
    {
      "id": "vvb",
      "name": "Validation & Verification Body",
      "permission": "Independently validates the design and verifies monitored data."
    }
  ],
  "schemas": [
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/wri-vwba-water-intervention",
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/wri-vwba-water-monitoring"
  ],
  "graph": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.graph/wri-vwba",
  "issuesAs": "org.hypercerts.claim.activity",
  "workScope": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.workscope.cel/wri-vwba-scope",
  "rights": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.claim.rights/wri-vwba-rights",
  "createdAt": "2025-01-01T00:00:00.000Z"
}

04 · Schemas

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