Parakrama Samudra (Parakrama Samudraya) reservoir

E567631

ancient reservoir hydraulic engineering structure irrigation reservoir

Parakrama Samudra (Parakrama Samudraya) is a vast ancient irrigation reservoir in Sri Lanka, renowned as a masterpiece of hydraulic engineering built during the reign of King Parakramabahu I.

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All labels observed (3)

Label	Occurrences
Parakrama Samudra	4
Parakrama Samudra (Parakrama Samudraya) reservoir canonical	1
Parakrama Samudra reservoir	1

How this entity was disambiguated

This entity first appeared as the object of triple T6078082 — 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: Parakrama Samudra (Parakrama Samudraya) reservoir
Context triple: [Ancient City of Polonnaruwa, hasStructure, Parakrama Samudra (Parakrama Samudraya) reservoir]

A. Randenigala Dam
Randenigala Dam is a major hydroelectric and irrigation dam in Sri Lanka, forming part of the Mahaweli Development Programme and creating the Randenigala Reservoir.
B. Kandy Lake
Kandy Lake is an artificial lake in the heart of Kandy, Sri Lanka, known for its scenic setting amid the city’s historic and religious landmarks.
C. Maduru Oya
Maduru Oya is a major river in Sri Lanka known for its irrigation reservoir and surrounding national park rich in wildlife and dry-zone ecosystems.
D. Polgolla Dam
Polgolla Dam is a key diversion dam in Sri Lanka that channels water from the Mahaweli River for irrigation, hydropower generation, and regional water management.
E. Jaffna Lagoon
Jaffna Lagoon is a large coastal lagoon in northern Sri Lanka known for its rich biodiversity, fishing grounds, and importance to the local Jaffna Peninsula communities.
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: Parakrama Samudra (Parakrama Samudraya) reservoir
Target entity description: Parakrama Samudra (Parakrama Samudraya) is a vast ancient irrigation reservoir in Sri Lanka, renowned as a masterpiece of hydraulic engineering built during the reign of King Parakramabahu I.

A. Randenigala Dam
Randenigala Dam is a major hydroelectric and irrigation dam in Sri Lanka, forming part of the Mahaweli Development Programme and creating the Randenigala Reservoir.
B. Kandy Lake
Kandy Lake is an artificial lake in the heart of Kandy, Sri Lanka, known for its scenic setting amid the city’s historic and religious landmarks.
C. Maduru Oya
Maduru Oya is a major river in Sri Lanka known for its irrigation reservoir and surrounding national park rich in wildlife and dry-zone ecosystems.
D. Polgolla Dam
Polgolla Dam is a key diversion dam in Sri Lanka that channels water from the Mahaweli River for irrigation, hydropower generation, and regional water management.
E. Jaffna Lagoon
Jaffna Lagoon is a large coastal lagoon in northern Sri Lanka known for its rich biodiversity, fishing grounds, and importance to the local Jaffna Peninsula communities.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	ancient reservoir ⓘ hydraulic engineering structure ⓘ irrigation reservoir ⓘ
alsoKnownAs	Parakrama Samudraya ⓘ Sea of Parakrama ⓘ linked to: Parakrama Samudraya
associatedWith	Polonnaruwa Kingdom ⓘ ancient Sri Lankan irrigation technology ⓘ
builder	King Parakramabahu I ⓘ
constructionPeriod	reign of Parakramabahu I ⓘ
country	Sri Lanka ⓘ
culturalSignificance	important landmark in Polonnaruwa ⓘ symbol of ancient Sri Lankan hydraulic civilization ⓘ
currentUse	hydraulic research and study site ⓘ modern irrigation ⓘ
engineeringType	gravity-fed reservoir ⓘ
hasFeature	ancient sluice structures ⓘ long embankment ⓘ multiple interconnected basins ⓘ
hasPart	canal network ⓘ earthen bund ⓘ sluice gates ⓘ spillways ⓘ
heritageStatus	part of UNESCO World Heritage Site Ancient City of Polonnaruwa ⓘ
locatedIn	North Central Province, Sri Lanka ⓘ Polonnaruwa ⓘ Polonnaruwa District ⓘ ancient city of Polonnaruwa ⓘ linked to: Ancient City of Polonnaruwa
locatedOn	Mahaweli river basin ⓘ linked to: Mahaweli River drainage basin
managedBy	Sri Lankan irrigation authorities ⓘ
material	earth ⓘ stone ⓘ
namedAfter	Parakramabahu I ⓘ linked to: King Parakramabahu I
near	Polonnaruwa archaeological ruins ⓘ linked to: Ancient City of Polonnaruwa
partOf	ancient irrigation system of Sri Lanka ⓘ
purpose	agricultural support ⓘ irrigation ⓘ water storage ⓘ
recognizedAs	masterpiece of hydraulic engineering ⓘ
region	Dry Zone of Sri Lanka ⓘ
tourismType	eco-tourism attraction ⓘ heritage tourism site ⓘ
usedFor	domestic water supply ⓘ fisheries ⓘ paddy cultivation ⓘ tourism ⓘ
waterSource	Amban Ganga ⓘ rainwater ⓘ

How these facts were elicited