Kalu River
E565294
The Kalu River is one of Sri Lanka’s major rivers, flowing southwest from the island’s central highlands to the Indian Ocean and playing a key role in regional agriculture, ecology, and flood control.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kalu River canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5901657 — 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: Kalu River Context triple: [Central Highlands of Sri Lanka, isWatershedFor, Kalu River]
-
A.
Aba River
The Aba River is a waterway in southeastern Nigeria that flows through the city of Aba and serves as an important local natural and economic resource.
-
B.
Akatarawa River
The Akatarawa River is a scenic river in the Wellington Region of New Zealand, flowing through bush-clad valleys and rural areas before joining the Hutt River.
-
C.
Omo River
The Omo River is a major river in southwestern Ethiopia that flows from the Ethiopian highlands into Kenya’s Lake Turkana, supporting diverse ecosystems and indigenous communities along its course.
-
D.
Kaduna River
The Kaduna River is a major tributary of the Niger River in central Nigeria, flowing through Kaduna State and serving as an important water source for agriculture, fishing, and local communities.
-
E.
Ogun River
Ogun River is a major river in southwestern Nigeria that flows southward through several states into the Lagos Lagoon, playing an important role in regional agriculture, transportation, and water supply.
- 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: Kalu River Target entity description: The Kalu River is one of Sri Lanka’s major rivers, flowing southwest from the island’s central highlands to the Indian Ocean and playing a key role in regional agriculture, ecology, and flood control.
-
A.
Aba River
The Aba River is a waterway in southeastern Nigeria that flows through the city of Aba and serves as an important local natural and economic resource.
-
B.
Akatarawa River
The Akatarawa River is a scenic river in the Wellington Region of New Zealand, flowing through bush-clad valleys and rural areas before joining the Hutt River.
-
C.
Omo River
The Omo River is a major river in southwestern Ethiopia that flows from the Ethiopian highlands into Kenya’s Lake Turkana, supporting diverse ecosystems and indigenous communities along its course.
-
D.
Kaduna River
The Kaduna River is a major tributary of the Niger River in central Nigeria, flowing through Kaduna State and serving as an important water source for agriculture, fishing, and local communities.
-
E.
Ogun River
Ogun River is a major river in southwestern Nigeria that flows southward through several states into the Lagos Lagoon, playing an important role in regional agriculture, transportation, and water supply.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| alsoKnownAs | Kalu Ganga ⓘ |
| associatedWith | gem mining areas around Ratnapura ⓘ |
| basinCountry | Sri Lanka ⓘ |
| basinSize | approximately 2766 km² ⓘ |
| climateZone | humid tropical monsoon climate ⓘ |
| country | Sri Lanka ⓘ |
| dischargesInto | Indian Ocean at Kalutara ⓘ |
| drainageBasin | wet zone of Sri Lanka ⓘ |
| ecosystemType | tropical wet-zone river ⓘ |
| flowsThrough |
Kalutara District
ⓘ
Ratnapura District ⓘ
linked to:
Ratnapura
|
| hasBridge | Kalutara Bridge ⓘ |
| hasEstuary | Kalu River estuary at Kalutara ⓘ |
| hasFloodPlain | Kalutara floodplain ⓘ |
| importance |
key role in regional agriculture
ⓘ
key role in regional ecology ⓘ key role in regional flood control ⓘ major source of freshwater for southwestern Sri Lanka ⓘ |
| knownFor |
frequent flooding in lower basin
ⓘ
high rainfall catchment ⓘ |
| language | Sinhala ⓘ |
| length | approximately 129 km ⓘ |
| locatedIn | Southwestern Sri Lanka ⓘ |
| majorCityOnRiver |
Kalutara
ⓘ
Ratnapura ⓘ |
| managementConcern |
flood management
ⓘ
river basin management planning ⓘ |
| mouth | Indian Ocean ⓘ |
| mouthLocation | Kalutara ⓘ |
| nameMeaning | Black River in Sinhala ⓘ |
| passesNear |
Sri Pada (Adam's Peak)
ⓘ
linked to:
Adam's Peak
|
| region |
Sabaragamuwa Province
ⓘ
linked to:
Sabaragamuwa Province of Sri Lanka
Western Province ⓘ |
| sourceRegion |
Adam's Peak massif
ⓘ
linked to:
Adam's Peak
Central Highlands of Sri Lanka ⓘ |
| threat |
pollution from urban and agricultural runoff
ⓘ
riverbank erosion ⓘ sand mining impacts ⓘ |
| tributary |
Hangamu Ganga
ⓘ
linked to:
Kuda Ganga
Kuda Ganga ⓘ We Ganga ⓘ |
| usedFor |
hydropower potential
ⓘ
inland fisheries ⓘ irrigation ⓘ sand mining ⓘ transport on some stretches ⓘ |
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: Kalu River Description of subject: The Kalu River is one of Sri Lanka’s major rivers, flowing southwest from the island’s central highlands to the Indian Ocean and playing a key role in regional agriculture, ecology, and flood control.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.