Arakawa floodway
E872939
The Arakawa floodway is a major engineered diversion channel in Tokyo designed to control flooding of the Arakawa River and protect the surrounding urban area.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Arakawa River flood control system | 1 |
| Arakawa River levee | 1 |
| Arakawa floodway canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10567495 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Arakawa floodway Context triple: [Arakawa River, hasChannel, Arakawa floodway]
-
A.
Yuzui (Fish Mouth) levee
Yuzui (Fish Mouth) levee is the central diversion structure of the Dujiangyan Irrigation System that splits the Min River’s flow to enable flood control and irrigation.
-
B.
East Coast Protective Levee system
The East Coast Protective Levee system is a network of flood-control levees in South Florida designed to protect developed coastal areas from flooding and manage water levels as part of the region’s broader water management infrastructure.
-
C.
Trinity River floodway
The Trinity River floodway is a large engineered flood-control channel and greenbelt in Dallas, Texas, designed to manage Trinity River flooding while providing open space and transportation corridors.
-
D.
Nara Canal
Nara Canal is one of Pakistan’s major irrigation canals, channeling Indus River water to agricultural lands in Sindh.
-
E.
Lake Biwa Canal
Lake Biwa Canal is a historic Japanese waterway and engineering project that channels water from Lake Biwa to Kyoto, supporting transportation, industry, and urban development since the late 19th century.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Arakawa floodway Target entity description: The Arakawa floodway is a major engineered diversion channel in Tokyo designed to control flooding of the Arakawa River and protect the surrounding urban area.
-
A.
Yuzui (Fish Mouth) levee
Yuzui (Fish Mouth) levee is the central diversion structure of the Dujiangyan Irrigation System that splits the Min River’s flow to enable flood control and irrigation.
-
B.
East Coast Protective Levee system
The East Coast Protective Levee system is a network of flood-control levees in South Florida designed to protect developed coastal areas from flooding and manage water levels as part of the region’s broader water management infrastructure.
-
C.
Trinity River floodway
The Trinity River floodway is a large engineered flood-control channel and greenbelt in Dallas, Texas, designed to manage Trinity River flooding while providing open space and transportation corridors.
-
D.
Nara Canal
Nara Canal is one of Pakistan’s major irrigation canals, channeling Indus River water to agricultural lands in Sindh.
-
E.
Lake Biwa Canal
Lake Biwa Canal is a historic Japanese waterway and engineering project that channels water from Lake Biwa to Kyoto, supporting transportation, industry, and urban development since the late 19th century.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
civil engineering structure
ⓘ
flood control channel ⓘ |
| connectsWith |
Arakawa River
ⓘ
Sumida River ⓘ Tokyo Bay ⓘ |
| country | Japan ⓘ |
| crosses |
Tokyo lowland
ⓘ
linked to:
Tokyo Bay lowlands
|
| designedTo |
divert excess flow from Arakawa River
ⓘ
prevent overflow of Arakawa River ⓘ protect densely populated districts ⓘ protect industrial and commercial zones ⓘ |
| engineeringDiscipline |
flood control engineering
ⓘ
hydraulic engineering ⓘ river engineering ⓘ |
| follows | Arakawa River ⓘ |
| hasFeature |
embankments
ⓘ
floodgates ⓘ levees ⓘ recreation areas on riverbanks ⓘ wide river channel ⓘ |
| hasUse |
emergency floodway
ⓘ
parks on riverbanks ⓘ sports fields on floodplain ⓘ |
| locatedIn |
Arakawa River basin
ⓘ
Honshu ⓘ Kantō region ⓘ Tokyo ⓘ |
| locatedInAdministrativeEntity |
Adachi, Tokyo
ⓘ
Edogawa, Tokyo ⓘ Katsushika, Tokyo ⓘ Kita, Tokyo ⓘ Tokyo Metropolis ⓘ
linked to:
Tokyo Metropolis, Japan
|
| locatedNear |
Sumida River
ⓘ
Tokyo Bay ⓘ |
| managedBy |
Kanto Regional Development Bureau
ⓘ
Ministry of Land, Infrastructure, Transport and Tourism of Japan ⓘ |
| partOf |
Arakawa River flood control system
ⓘ
linked to:
Arakawa floodway
Tokyo metropolitan flood control infrastructure ⓘ
linked to:
Tokyo river system
|
| protects |
Tokyo 23 wards
ⓘ
central Tokyo ⓘ residential areas along Arakawa River ⓘ transportation infrastructure in Tokyo lowland ⓘ |
| purpose |
flood control
ⓘ
flood diversion ⓘ protection of urban areas ⓘ reduction of flood risk in Tokyo ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Arakawa floodway Description of subject: The Arakawa floodway is a major engineered diversion channel in Tokyo designed to control flooding of the Arakawa River and protect the surrounding urban area.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Arakawa floodway
linked to: Arakawa floodway