physics.fluid.broad_crested_weir

• Golden tests 0 / 0
• Boundary tests 0 / 0
• Property tests 5 / 5
• Production surface contract 1 / 1
}
• Engine tested Yes
• Source checked Yes
• Artifact integrity PASS
• Production attestation Embedded snapshot: STALE · Last attested schema matched 1.0.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-18T02:44:05.986Z
• Semantic contract PASS
• Evidence attested at 2026-09-18T02:44:05.231Z
• Last production check 2026-09-18T02:44:05.231Z
• Public / cache PASS
• Origin PASS
• Supplemental domain review Not performed
• Named expert review Not performed

• release artifacts aligned PASS

Fingerprint sha256:9aad5dea7891b39d746ec6bae33355dab9c570c24489cf17fc13761f28a860dc

Input schema sha256:8114fe63a6ba2075facd0231cc59ee9e5b797d81d79eff60b4804621686b6ecc · Output schema sha256:2c7e90576ffe0e85baef653acac9f58cc63d8d6fe08a7657f7fc6a5e2deba89e · 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

broad-crested-weir

Engine

broad-crested-weir

Engine build

2026-09-18

Evidence core

2026-09-18T02:00:19.838Z

Rendered

2026-09-18T03:31:40.488Z

Last reviewed

—

Assumptions

• Rectangular broad-crested weir: Q = C_d (2/3)^{3/2} b √g H^{3/2}; default C_d=0.85; modular free nappe; C_d is an input in (0, 1]
• H is upstream head above the crest, not energy head; optional L_c envelope H/L_c∈[0.08,0.50]; optional P with H/P≤1.5
• Not thin-plate (2/3) C_d L √(2g) H^{3/2}, not Manning n, not Q=Av, not orifice C_d A √(2gH), not Francis 3.33 L H^{3/2}

Limitations

• Rectangular broad-crested weir: Q = C_d (2/3)^{3/2} b √g H^{3/2}; default C_d=0.85; modular free nappe; C_d is an input in (0, 1]
• H is upstream head above the crest, not energy head; optional L_c envelope H/L_c∈[0.08,0.50]; optional P with H/P≤1.5
• Not thin-plate (2/3) C_d L √(2g) H^{3/2}, not Manning n, not Q=Av, not orifice C_d A √(2gH), not Francis 3.33 L H^{3/2}