Methods & Controls

From physical infrastructure to defensible water stewardship evidence.

Shoalwater combines basin context, project evidence, conservative accounting, attribution controls, and transparent reporting to determine what an intervention does—and what may credibly be communicated.

Basin-specific Evidence-tiered Conservative accounting Claim-aware

Core Position

Not every gallon managed is automatically a replenishment claim.

Shoalwater documents physical system function first. Reporting eligibility is evaluated separately using project boundaries, baseline conditions, basin relevance, operating status, evidence quality, funding contribution, consent, and attribution.

Physical functionWhat the asset is designed or observed to capture, store, slow, infiltrate, reuse, or filter.

Stewardship valueHow that function contributes to local water resilience, basin priorities, and future investment decisions.

Reportable outcomeWhat remains eligible after baseline, evidence, additionality, attribution, and claims controls are applied.

Frameworks Informing the Method

Built to support reputable corporate water reporting.

Shoalwater is informed by leading water stewardship and benefit-accounting guidance. References to these frameworks do not imply certification, verification, or independent assurance.

Catchment Context

Alliance for Water Stewardship

Informs basin context, shared water challenges, governance, water balance, water quality, freshwater ecosystems, stakeholder engagement, and transparent action.

Volumetric Benefits

VWBA 2.0

Informs project goals, baseline and boundary definition, conservative estimation, timeframe selection, benefit evaluation, tracking, and double-counting controls.

Water Quality

Water Quality Benefit Accounting

Informs a separate pathway for evaluating and communicating water-quality benefits without automatically converting them into replenishment volume.

Six-Step Method

A reviewable path from project evidence to basin reporting.

Define the basin

Assign catchment and sub-basin context, shared water challenges, and local priorities.

Set baseline and boundary

Document the asset, drainage area, pre-project condition, ownership, and reporting period.

Classify the benefit

Separate capture, storage, delay, infiltration, reuse, water quality, and potential replenishment pathways.

Select the method

Prioritize direct measurement, then engineering calculations, validated modeling, and conservative screening estimates.

Apply eligibility controls

Evaluate additionality, operating condition, duration, contribution, consent, attribution, and double counting.

Report with confidence

Disclose evidence level, assumptions, uncertainty, calculation version, and claim-safe language.

Evidence Quality

Not all data is equal. Confidence should be visible.

TIER D

Registered

Owner-submitted system identity and location. Useful for asset visibility, but not sufficient for external volumetric claims.

TIER C

Documented

Photos, dimensions, drainage area, specifications, or installation records support a screening-level estimate.

TIER B

Engineered

Approved design records, site-specific inputs, inspection evidence, and accepted methods support stronger modeled results.

TIER A

Measured

Metered reuse, sensors, calibrated flow data, current operating evidence, and maintenance records support the highest confidence.

Recommended reporting format: modeled annual benefit, conservative reportable estimate, reporting period, evidence tier, material assumptions, uncertainty range, and verification status.

Existing Asset Treatment

Registration creates visibility. Additional claims require additional evidence.

Asset status	Eligible treatment
Existing asset	Basin inventory, condition, and estimated existing performance.
Rehabilitated asset	Potential incremental restored performance, subject to baseline and attribution controls.
Expanded asset	Potential incremental capacity attributable to the expansion.
New installation	Potential new eligible performance during the defined operating and reporting period.
Maintenance-supported asset	Potential preserved or restored function rather than the system’s entire historical volume.
Publicly funded asset	Basin visibility and infrastructure intelligence; corporate attribution requires a distinct incremental contribution.

Accounting Guardrails

Five controls before aggregation.

These controls are intended to prevent overstated, overlapping, or poorly supported outcomes.

Double counting

Capture, storage, infiltration, delay, and reuse remain separately labeled when adding them would count the same water twice.

Downtime

No benefit during known disconnection, failure, decommissioning, or material nonperformance.

Attribution

Benefits are attributed only through explicit authorization and a defined program or funding agreement.

Measured vs. modeled

Direct measurements and modeled estimates remain distinguishable in every external output.

Revision control

Calculations are updated when stronger evidence, changed conditions, maintenance records, or monitoring data become available.

Claims & Assurance

Separate evidence strength from the level of external review.

Internal estimate

A transparent calculation prepared from available project evidence and stated assumptions.

Reviewed result

The calculation and supporting evidence have passed Shoalwater’s documented internal review controls.

Verified implementation

Project installation or operating evidence confirms that the intervention exists and meets defined eligibility requirements.

Independently assured

A qualified external party has reviewed the defined methodology, evidence, and reported outcome.

Reporting boundary: Shoalwater outputs support decision-making and disclosure preparation. They do not replace company-level legal review, regulatory compliance, AWS certification, or independent assurance.

Make every method reviewable.

Clear boundaries, evidence tiers, conservative assumptions, and claim controls give partners confidence in what is being measured—and what is not.

Request the Methods & Controls Brief