Kotmale Oya
E554235
Kotmale Oya is a major river in central Sri Lanka that flows through the hill country and feeds into the Mahaweli River, contributing significantly to the region’s hydropower and irrigation systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kotmale Oya canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5887622 — 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: Kotmale Oya Context triple: [Mahaweli River, hasTributary, Kotmale Oya]
-
A.
Leysse River
The Leysse River is a watercourse in the Savoie region of southeastern France that flows through Chambéry before emptying into Lake Bourget.
-
B.
Keles River
The Keles River is a Central Asian watercourse that flows through Kazakhstan and Uzbekistan before joining the Syr Darya.
-
C.
Kilmez River
The Kilmez River is a waterway in Russia that serves as a tributary within the Kama River basin.
-
D.
Ziya River
The Ziya River is a major river in northern China that serves as one of the principal tributaries feeding into the Hai River system.
-
E.
Kunhar River
The Kunhar River is a scenic mountain river in northern Pakistan that flows through the Kaghan Valley before joining the Jhelum River.
- 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: Kotmale Oya Target entity description: Kotmale Oya is a major river in central Sri Lanka that flows through the hill country and feeds into the Mahaweli River, contributing significantly to the region’s hydropower and irrigation systems.
-
A.
Leysse River
The Leysse River is a watercourse in the Savoie region of southeastern France that flows through Chambéry before emptying into Lake Bourget.
-
B.
Keles River
The Keles River is a Central Asian watercourse that flows through Kazakhstan and Uzbekistan before joining the Syr Darya.
-
C.
Kilmez River
The Kilmez River is a waterway in Russia that serves as a tributary within the Kama River basin.
-
D.
Ziya River
The Ziya River is a major river in northern China that serves as one of the principal tributaries feeding into the Hai River system.
-
E.
Kunhar River
The Kunhar River is a scenic mountain river in northern Pakistan that flows through the Kaghan Valley before joining the Jhelum River.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Sri Lanka NERFINISHED ⓘ |
| contributesTo |
Mahaweli hydropower system
NERFINISHED
ⓘ
Mahaweli irrigation system NERFINISHED ⓘ national grid of Sri Lanka NERFINISHED ⓘ |
| country | Sri Lanka ⓘ |
| drainageBasin | Mahaweli Ganga basin NERFINISHED ⓘ |
| ecosystemService | freshwater habitat for hill-country species ⓘ |
| flowsThrough |
Kandy District
NERFINISHED
ⓘ
Kotmale NERFINISHED ⓘ Nuwara Eliya District NERFINISHED ⓘ |
| geologicalSetting | Sri Lankan central highlands NERFINISHED ⓘ |
| hasDam | Kotmale Dam NERFINISHED ⓘ |
| hasFeature |
reservoir-backed lower course
ⓘ
steep gradients in upper reaches ⓘ |
| hasHydropowerPlant | Kotmale Hydropower Station NERFINISHED ⓘ |
| hasReservoir | Kotmale Reservoir NERFINISHED ⓘ |
| hasValley | Kotmale Valley NERFINISHED ⓘ |
| infrastructure |
Kotmale Dam spillway
ⓘ
tunnels for hydropower diversion ⓘ |
| languageOfName | Sinhala ⓘ |
| locatedIn |
Central Province, Sri Lanka
NERFINISHED
ⓘ
hill country of Sri Lanka ⓘ |
| mouth | Mahaweli River NERFINISHED ⓘ |
| mouthLocation | near Polgolla, Sri Lanka ⓘ |
| nameElementMeaning | "Oya" means "stream" or "river" in Sinhala ⓘ |
| nearbyCity |
Kandy
NERFINISHED
ⓘ
Nuwara Eliya NERFINISHED ⓘ |
| partOf | Mahaweli River basin NERFINISHED ⓘ |
| partOfProject | Mahaweli Development Programme NERFINISHED ⓘ |
| region | central Sri Lanka ⓘ |
| riverSystem | Mahaweli River system NERFINISHED ⓘ |
| supports |
rural communities in central Sri Lanka
ⓘ
tea-growing regions in the hill country ⓘ |
| tributaryOf | Mahaweli River NERFINISHED ⓘ |
| usedFor |
drinking water supply
ⓘ
hydropower generation ⓘ irrigation ⓘ |
| watercourseCategory | major river in central Sri Lanka ⓘ |
| waterManagementRole |
flood control in Mahaweli basin
ⓘ
regulated flow to Mahaweli River ⓘ |
| waterUse |
agricultural irrigation in downstream areas
ⓘ
paddy cultivation support ⓘ |
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: Kotmale Oya Description of subject: Kotmale Oya is a major river in central Sri Lanka that flows through the hill country and feeds into the Mahaweli River, contributing significantly to the region’s hydropower and irrigation systems.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.