Alqueva Reservoir
E738788
Alqueva Reservoir is one of Western Europe’s largest artificial lakes, created by the Alqueva Dam on the Guadiana River in southern Portugal and known for irrigation, hydroelectric power, and tourism.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Alqueva Reservoir canonical | 9 |
| Alqueva reservoir | 6 |
| Alqueva Dam | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8515045 — 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: Alqueva Reservoir Context triple: [Moura, near, Alqueva Reservoir]
-
A.
Carraízo reservoir
Carraízo Reservoir is a major water storage lake in Puerto Rico that serves as a key source of drinking water and flood control for the San Juan metropolitan area.
-
B.
Pilarcitos Reservoir
Pilarcitos Reservoir is a key drinking water storage reservoir on the San Francisco Peninsula that helps supply water to the San Francisco Bay Area.
-
C.
Torrejón-Tajo Dam
Torrejón-Tajo Dam is a major hydraulic structure on the Tagus River in Spain, used primarily for water regulation and hydroelectric power generation within the Tagus Basin.
-
D.
Alicurá Dam
Alicurá Dam is a large hydroelectric dam in Argentina’s Patagonia region, known for forming the Alicurá Reservoir and generating power on the Limay River.
-
E.
Cabril Reservoir
Cabril Reservoir is a major artificial lake in central Portugal, created by a dam on the Zêzere River and used for hydroelectric power generation, water storage, and recreation.
- 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: Alqueva Reservoir Target entity description: Alqueva Reservoir is one of Western Europe’s largest artificial lakes, created by the Alqueva Dam on the Guadiana River in southern Portugal and known for irrigation, hydroelectric power, and tourism.
-
A.
Carraízo reservoir
Carraízo Reservoir is a major water storage lake in Puerto Rico that serves as a key source of drinking water and flood control for the San Juan metropolitan area.
-
B.
Pilarcitos Reservoir
Pilarcitos Reservoir is a key drinking water storage reservoir on the San Francisco Peninsula that helps supply water to the San Francisco Bay Area.
-
C.
Torrejón-Tajo Dam
Torrejón-Tajo Dam is a major hydraulic structure on the Tagus River in Spain, used primarily for water regulation and hydroelectric power generation within the Tagus Basin.
-
D.
Alicurá Dam
Alicurá Dam is a large hydroelectric dam in Argentina’s Patagonia region, known for forming the Alicurá Reservoir and generating power on the Limay River.
-
E.
Cabril Reservoir
Cabril Reservoir is a major artificial lake in central Portugal, created by a dam on the Zêzere River and used for hydroelectric power generation, water storage, and recreation.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| basinCountry |
Portugal
ⓘ
Spain ⓘ |
| continent | Europe ⓘ |
| country | Portugal ⓘ |
| createdBy | Alqueva Dam ⓘ |
| crossesBorderWith | Spain ⓘ |
| hasActivity |
birdwatching
ⓘ
boating ⓘ fishing ⓘ sailing ⓘ swimming ⓘ |
| hasImpact |
changes in local ecosystems
ⓘ
creation of new irrigation perimeters ⓘ development of rural tourism ⓘ landscape transformation in Alentejo ⓘ submergence of former farmland ⓘ |
| hasPurpose |
agricultural irrigation
ⓘ
electricity production ⓘ flood control ⓘ public water supply ⓘ tourism development ⓘ |
| hasTouristAttraction |
Monsaraz village views
ⓘ
dark sky tourism ⓘ |
| knownFor |
hydroelectric power generation
ⓘ
irrigation ⓘ recreation ⓘ stargazing ⓘ tourism ⓘ water supply ⓘ |
| languageRegion | Portuguese-speaking area ⓘ |
| locatedIn |
Alentejo
ⓘ
Western Europe ⓘ southern Portugal ⓘ |
| locatedNear |
Alandroal
ⓘ
Moura ⓘ Mértola ⓘ Portel ⓘ Reguengos de Monsaraz ⓘ |
| locatedOnRiver | Guadiana River ⓘ |
| operator |
EDIA
ⓘ
EDP ⓘ |
| partOf |
Guadiana River basin
ⓘ
linked to:
Guadiana Basin
|
| partOfProject |
Alqueva Multipurpose Project
ⓘ
linked to:
Alqueva Dam
|
| region | Alqueva region ⓘ |
| watercourse | Guadiana River ⓘ |
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: Alqueva Reservoir Description of subject: Alqueva Reservoir is one of Western Europe’s largest artificial lakes, created by the Alqueva Dam on the Guadiana River in southern Portugal and known for irrigation, hydroelectric power, and tourism.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Alqueva Reservoir
linked to: Alqueva Reservoir
linked to: Alqueva Reservoir
linked to: Alqueva Reservoir
linked to: Alqueva Reservoir
linked to: Alqueva Reservoir