# ☆ L3 Benchmark — T1_nominal
**ID:** `L3-421-001-001-T1` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Spec [`L2-421-001`](/artifact/l2/L2-421-001) · ⬆ Principle [`L1-421`](/artifact/l1/L1-421)
> **🏷 Type:** `fixed` · **Tier:** `T1` · **Quality:** `standard`
> **🎯 Threshold (ε):** `0.1`
> **📊 Baselines:** 2 reference solvers benchmarked
> **⛓ On-chain block:** 41555245
---
## 🏷 1. Benchmark Profile
**Type:** `fixed` · **Tier:** `T1` · **Quality:** `standard`
Standard Environmental Science conditions, clean data, calibrated model.
## 2. Operating Point (Ω-tier)
| Parameter | Unit | Value |
|---|---|---|
| N gauges | — | 5 |
| Roughness n | N | 0.035 |
| Reach length km | km | 50 |
| Discharge peak m3 s | s | 1000 |
| Groundwater exchange | — | 0 |
| Bank overflow uncertainty | — | 0 |
| Sediment transport coupling | — | 0 |
## 3. Success Threshold (ε)
`ε = 0.1`
## 4. Baseline Solvers
| Name | Metric | Score | Q | SSIM | SAM° |
|---|---|---|---|---|---|
| HEC_RAS_1D | water_level_RMSE_m | 0.12 | 0.96 | — | — |
| TELEMAC_2D | water_level_RMSE_m | 0.08 | 0.64 | — | — |
## 5. Registration Metadata
| Property | Value |
|---|---|
| D ibench | 0.15 |
| Rho | 1 |
| Principle id | L1-421 |
| Spec id | L2-421-001 |
**Benchmark hash:** `b6734eb3c9e9592f9206ccb90033b5b9d0a3eb39340f98a3e6aa48d1600cfa18`
## 6. On-chain Registration
- **Chain hash:** `0x4b5bd280ec59624fe4993c1c8160d65fc8d83d6f5b0a0538a05cfed513ca5b6c`
- **Chain tx hash:** `0xb9dbb29ff7c6f17cb8f3d03459412068f0c3cf9fbe981c534067c805e2cba218`
- **Chain block:** `41555245`
---
## File Mapping
This bundle consists of: `L3-421-001-001-T1.md`, `L3-421-001-001-T1.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L3-421-001-001-T1.md` | Source of truth — edit this | Human or LLM |
| `L3-421-001-001-T1.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L3-421-001-001-T1`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._