Oyan River Dam
E1010991
Oyan River Dam is a major multipurpose dam in southwestern Nigeria that supplies water, supports irrigation, and helps generate hydroelectric power for surrounding communities.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Oyan Dam | 2 |
| Oyan River Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12711926 — 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: Oyan River Dam Context triple: [Ogun River, hasDam, Oyan River Dam]
-
A.
Almatti Dam
Almatti Dam is a major hydroelectric and irrigation dam in Karnataka, India, built across the Krishna River as part of the Upper Krishna Project.
-
B.
Ertan Dam
Ertan Dam is a major arch dam and hydroelectric power station in Sichuan, China, known for its large installed capacity and role in regional power generation.
-
C.
Bariri Dam
Bariri Dam is a hydroelectric and river regulation structure located on Brazil’s Tietê River, contributing to regional power generation and water management.
-
D.
Zhinvali Dam
Zhinvali Dam is a large hydroelectric dam and reservoir in eastern Georgia, known for its striking turquoise waters and role in supplying water and power to the region.
-
E.
Enguri Dam
Enguri Dam is a massive arch dam in western Georgia, notable as one of the tallest concrete arch dams in the world and a key source of hydroelectric power for the region.
- 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: Oyan River Dam Target entity description: Oyan River Dam is a major multipurpose dam in southwestern Nigeria that supplies water, supports irrigation, and helps generate hydroelectric power for surrounding communities.
-
A.
Almatti Dam
Almatti Dam is a major hydroelectric and irrigation dam in Karnataka, India, built across the Krishna River as part of the Upper Krishna Project.
-
B.
Ertan Dam
Ertan Dam is a major arch dam and hydroelectric power station in Sichuan, China, known for its large installed capacity and role in regional power generation.
-
C.
Bariri Dam
Bariri Dam is a hydroelectric and river regulation structure located on Brazil’s Tietê River, contributing to regional power generation and water management.
-
D.
Zhinvali Dam
Zhinvali Dam is a large hydroelectric dam and reservoir in eastern Georgia, known for its striking turquoise waters and role in supplying water and power to the region.
-
E.
Enguri Dam
Enguri Dam is a massive arch dam in western Georgia, notable as one of the tallest concrete arch dams in the world and a key source of hydroelectric power for the region.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
multipurpose dam ⓘ |
| basin |
Ogun River Basin
ⓘ
linked to:
Ogun River
|
| beneficiary |
surrounding rural communities
ⓘ
urban centers in Lagos State ⓘ urban centers in Ogun State ⓘ |
| completionDate | 1980s ⓘ |
| constructionStart | 1970s ⓘ |
| continent | Africa ⓘ |
| country | Nigeria ⓘ |
| environmentalConcern |
changes in downstream aquatic ecosystems
ⓘ
reduced natural flooding downstream ⓘ |
| governedBy | Nigerian water resources policies ⓘ |
| hasFunction |
electricity generation potential
ⓘ
storage of raw water for treatment plants ⓘ support of agricultural production ⓘ support of municipal water supply schemes ⓘ |
| impact |
affects downstream communities through flow regulation
ⓘ
modifies flow of Ogun River system ⓘ |
| locatedIn |
Ogun State
ⓘ
Southwestern Nigeria ⓘ
linked to:
Western Nigeria
|
| locatedNear | Abeokuta ⓘ |
| managingAuthority | Ogun–Osun River Basin Development Authority ⓘ |
| owner |
Federal Government of Nigeria
ⓘ
linked to:
Government of Nigeria
|
| partOf | Nigerian federal water infrastructure ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation ⓘ water supply ⓘ |
| regionServed |
Lagos State
ⓘ
Ogun State ⓘ |
| reservoirName | Oyan Reservoir ⓘ |
| reservoirUse |
domestic water supply
ⓘ
fisheries ⓘ industrial water supply ⓘ irrigation ⓘ |
| risk |
seasonal water level fluctuations
ⓘ
sedimentation in reservoir ⓘ |
| river | Oyan River ⓘ |
| suppliesWaterTo |
Abeokuta
ⓘ
Lagos ⓘ |
| supportsActivity |
fishing
ⓘ
livestock watering ⓘ small-scale irrigation farming ⓘ |
| typeOfPower | hydroelectric ⓘ |
| waterSourceFor |
Abeokuta water supply system
ⓘ
Lagos metropolitan water supply system ⓘ |
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: Oyan River Dam Description of subject: Oyan River Dam is a major multipurpose dam in southwestern Nigeria that supplies water, supports irrigation, and helps generate hydroelectric power for surrounding communities.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Oyan River Dam
linked to: Oyan River Dam