{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T04:28:23Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 2,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T23:55:00Z",
      "ingestedAt": "2026-10-05T20:51:37+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-07T11:12:49+00:00",
        "engine": "codex",
        "fields": [
          "definition",
          "distinguishing_features",
          "visual_identification"
        ],
        "answering_review": "7e023042a8b421bed39e206eef2822b0b3134acc812b70d6644217cbe1aaf34f"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T12:16:29+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q159675",
    "registryId": "vr.tr.tributary",
    "name": "tributary",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.PLC"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q159675/",
  "model": {
    "registry_id": "vr.tr.tributary",
    "name": "tributary",
    "purpose": "Let an agent explain tributaries and drainage networks, describe how they are named, ordered and measured, identify tributaries of specific rivers with sources, and support hydrology and geography questions.",
    "definition": "A stream or river that flows into a main stem river or lake rather than directly into the sea, without requiring the receiving river to exceed it in length or discharge, distinguished as a left or right tributary by the side from which it joins when facing downstream, and including headwater tributaries that contribute to the main upper course; tributaries build drainage networks and basins, are ordered by stream order systems, and matter for hydrology, navigation, ecology and water management.",
    "what_it_is_for": "Streams flowing into larger watercourses.",
    "affordances": [
      "explain tributaries and networks",
      "describe naming and ordering",
      "identify tributaries of rivers",
      "support hydrology questions"
    ],
    "distinguishing_features": [
      "A tributary flows into a main stem river or lake regardless of relative length or discharge.",
      "Left and right designations refer to the side of entry when facing downstream.",
      "Stream order describes relationships within a drainage network.",
      "Tributaries contribute to the structure of a drainage basin."
    ],
    "appearance": "Streams and rivers joining larger ones.",
    "visual_identification": [
      "A tributary flows into a main stem river or lake that need not be larger.",
      "Left or right designation follows downstream orientation.",
      "A distributary branches away from a river, whereas a tributary joins a receiving river or lake."
    ],
    "physical_properties": [
      {
        "quantity": "Channel length",
        "unit": "km",
        "typical_range": "",
        "note": "Measured along the channel from its identified source to its confluence."
      },
      {
        "quantity": "Water discharge",
        "unit": "m3/s",
        "typical_range": "",
        "note": "Measured as water volume passing a channel cross-section per second, with the observation period specified."
      },
      {
        "quantity": "Drainage basin area",
        "unit": "km2",
        "typical_range": "",
        "note": "Measured as the upstream land area draining to the tributary outlet."
      },
      {
        "quantity": "Channel width",
        "unit": "m",
        "typical_range": "",
        "note": "Measured across the channel at a specified location and water level."
      }
    ],
    "families_and_kinds": [
      "headwater and initial tributaries",
      "left and right tributaries",
      "major tributaries of great rivers",
      "minor streams and brooks",
      "tributaries of lakes"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "watercourse",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "water cycle",
        "why": "runoff and river flow"
      },
      {
        "relation": "is related to",
        "target": "volume flow rate",
        "why": "discharge of tributaries"
      },
      {
        "relation": "is related to",
        "target": "aqueduct",
        "why": "artificial watercourses for contrast"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Hydrographic naming and ordering conventions",
      "Water management and river basin law",
      "No regulation of the concept"
    ],
    "failure_modes_and_hazards": [
      "Confusing left and right designation",
      "Confusing tributaries with distributaries",
      "Inconsistent naming of main stems"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Map and name tributaries from official hydrographic data, stating left or right bank.",
        "Monitor water level, flow and quality for the authority that commissioned it."
      ],
      "must_not": [
        "Divert, dam or abstract water from a tributary without the required permits.",
        "Discharge pollutants into a tributary.",
        "Disturb spawning grounds or riverbanks while surveying.",
        "Understate flood risk from a tributary to people living near it."
      ],
      "requires_human": [
        "Issuing flood warnings or advice to evacuate.",
        "Changing flows through gates or weirs on a tributary."
      ]
    },
    "ethics": {
      "considerations": [
        "What happens upstream on a tributary affects everyone downstream on the main river.",
        "Rivers sustain fisheries, farms and ecosystems that cross administrative borders."
      ],
      "affected_parties": [
        "Downstream communities",
        "Fish and river wildlife",
        "Farmers and water users"
      ]
    },
    "owners": {
      "steward": "The river basin or water authority; riparian owners hold rights along the banks.",
      "master_systems": [
        "National hydrographic databases",
        "Water abstraction permit registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q159675: tributary",
      "url": "https://www.wikidata.org/wiki/Q159675",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Tributary",
      "url": "https://en.wikipedia.org/wiki/Tributary",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What tributaries are.",
        "rationale": "Hydrology.",
        "layers": [
          {
            "id": "concept",
            "name": "Concept",
            "description": "Concept and naming.",
            "findings": [
              {
                "id": "concept-finding",
                "name": "Concept",
                "description": "Concept.",
                "questions": [
                  {
                    "text": "What is a tributary, how are left and right tributaries designated, and what is a main upper course?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which river system is meant?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "networks",
            "name": "Networks",
            "description": "Drainage networks and order.",
            "findings": [
              {
                "id": "networks-finding",
                "name": "Networks",
                "description": "Networks.",
                "questions": [
                  {
                    "text": "How do tributaries form drainage networks, and how do stream order systems classify them?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits drainage basins?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "identify",
        "name": "Identify",
        "description": "Tributaries of rivers.",
        "rationale": "Reference.",
        "layers": [
          {
            "id": "rivers",
            "name": "Rivers",
            "description": "Tributaries of a river.",
            "findings": [
              {
                "id": "rivers-finding",
                "name": "Rivers",
                "description": "Rivers.",
                "questions": [
                  {
                    "text": "What are the tributaries of a given river, according to hydrographic sources?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits a specific river?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "measure",
            "name": "Measure",
            "description": "Measuring tributaries.",
            "findings": [
              {
                "id": "measure-finding",
                "name": "Measure",
                "description": "Measurement.",
                "questions": [
                  {
                    "text": "How are length, discharge and catchment of tributaries measured?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits hydrometry?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "manage",
        "name": "Manage",
        "description": "Management and ecology.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "management",
            "name": "Management",
            "description": "Water management.",
            "findings": [
              {
                "id": "management-finding",
                "name": "Management",
                "description": "Management.",
                "questions": [
                  {
                    "text": "How do tributaries matter for flood management, water supply and river basin planning?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is a flood emergency present now?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "ecology",
            "name": "Ecology",
            "description": "Ecology.",
            "findings": [
              {
                "id": "ecology-finding",
                "name": "Ecology",
                "description": "Ecology.",
                "questions": [
                  {
                    "text": "What ecological roles do tributaries play for fish migration and habitats?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits river ecology?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "learn",
        "name": "Learn",
        "description": "History and teaching.",
        "rationale": "Education.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How have tributaries shaped settlement, boundaries and exploration?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "teach",
            "name": "Teach",
            "description": "Teaching.",
            "findings": [
              {
                "id": "teach-finding",
                "name": "Teach",
                "description": "Teaching.",
                "questions": [
                  {
                    "text": "How can river systems be taught with maps?",
                    "kind": "action"
                  },
                  {
                    "text": "Which misconceptions arise?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should drainage basins be a separate entry?",
    "How should hydrographic databases be linked?",
    "How should river basin management be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}