physics.fluid.weir

Three distinct suites: educational examples on the calculator page, this legacy regression count (15/15 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-26.o2-o3. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 7/7 CVP boundary · 10/10 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 5/5 CVP contract. digest cb016aee9f08. O2: thin-plate weir vs a separate-module identity (≤2 ULP). Not submerged H2, not orifice, not Manning, and not Darcy. ≤2 ULP vs O3 applies only to the published tabulated weir vectors. Not submerged H2, not orifice, not Manning, and not Darcy.

• Golden (oracle-backed) 4 / 4
• CVP boundary 7 / 7
• Invalid input 10 / 10
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 5 / 5
• Interfaces PASS · UI (SSR) / REST / MCP
• Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
• Verified scope Thin-plate rectangular and triangular free-flow weir discharge, + O3 mpmath tabulated Q.
• Assurance Engineering
• Deferred Not submerged H2, not orifice, not Manning, not Darcy, not Parshall/sluice/ogee/side.

• release artifacts aligned PASS
• schema output required declared PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• rest success payload validates schema PASS

Fingerprint sha256:89f4b29e1866ab5aebf1de5dc2f8ea3977fde29a6c9c321d2824d2b28b459b96

Input schema sha256:2a4b8c2260cb328e0b5d7d09678ab65c431ca7e6f44cef407664bfeaad0fc564 · Output schema sha256:0fb770b1938aaa0ccc3fbc75ffcf04311171ef33a53871b941e2481fa2ac0a86 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Tool

weir-discharge

Engine

weir-discharge

Engine build

2026-09-18

Evidence core

2026-09-18T13:11:24.388Z

Rendered

2026-11-10T05:18:41.920Z

Last reviewed

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Assumptions

• Thin-plate weir; free nappe
• SI g=9.80665 unless given
• Rectangular: Q=(2/3) C_d L √(2g) H^{3/2}; not Francis contractions
• Triangular: Q=(8/15) C_d √(2g) tan(θ/2) H^{5/2}
• Not Manning, not Q=Av, not Darcy, not an orifice

Limitations

• Thin-plate weir; free nappe; SI g=9.80665 unless given
• Rectangular: Q=(2/3) C_d L √(2g) H^{3/2}; not Francis contractions
• Triangular: Q=(8/15) C_d √(2g) tan(θ/2) H^{5/2}
• Not Manning, not Q=Av, not Darcy, not an orifice