Lempa River basin
E470191
The Lempa River basin is a major Central American watershed, primarily in El Salvador, that drains a large region into the Pacific Ocean and supports significant agriculture, hydropower, and urban populations.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lempa River basin canonical | 6 |
| Lempa River watershed | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4787872 — 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: Lempa River basin Context triple: [Acelhuate River basin, emptiesInto, Lempa River basin]
-
A.
Yana River basin
The Yana River basin is a large Arctic drainage area in northeastern Siberia, encompassing the watershed of the Yana River as it flows northward to the Laptev Sea.
-
B.
Rioni River basin
The Rioni River basin is a major drainage area in western Georgia encompassing the Rioni River and its tributaries, supporting significant regional ecosystems, agriculture, and settlements.
-
C.
Rega River basin
The Rega River basin is the drainage area of the Rega River in northwestern Poland, encompassing the river’s tributaries, surrounding landscapes, and towns such as Schievelbein (Świdwin).
-
D.
Acelhuate River basin
The Acelhuate River basin is a watershed in central El Salvador that drains much of the San Salvador metropolitan area and is known for severe urban pollution and flood risk.
-
E.
Kamchiya River basin
The Kamchiya River basin is a drainage region in eastern Bulgaria centered around the Kamchiya River, encompassing diverse landscapes and several towns and villages.
- 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: Lempa River basin Target entity description: The Lempa River basin is a major Central American watershed, primarily in El Salvador, that drains a large region into the Pacific Ocean and supports significant agriculture, hydropower, and urban populations.
-
A.
Yana River basin
The Yana River basin is a large Arctic drainage area in northeastern Siberia, encompassing the watershed of the Yana River as it flows northward to the Laptev Sea.
-
B.
Rioni River basin
The Rioni River basin is a major drainage area in western Georgia encompassing the Rioni River and its tributaries, supporting significant regional ecosystems, agriculture, and settlements.
-
C.
Rega River basin
The Rega River basin is the drainage area of the Rega River in northwestern Poland, encompassing the river’s tributaries, surrounding landscapes, and towns such as Schievelbein (Świdwin).
-
D.
Acelhuate River basin
The Acelhuate River basin is a watershed in central El Salvador that drains much of the San Salvador metropolitan area and is known for severe urban pollution and flood risk.
-
E.
Kamchiya River basin
The Kamchiya River basin is a drainage region in eastern Bulgaria centered around the Kamchiya River, encompassing diverse landscapes and several towns and villages.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
river basin
ⓘ
watershed ⓘ |
| countryWithLargestShare | El Salvador ⓘ |
| drainsInto | Pacific Ocean ⓘ |
| hasClimate | tropical climate ⓘ |
| hasEconomicImportanceFor |
El Salvador
ⓘ
Guatemala ⓘ Honduras ⓘ |
| hasEnvironmentalIssue |
deforestation in upper catchments
ⓘ
flood risk in lower basin ⓘ sedimentation in reservoirs ⓘ water pollution from agriculture ⓘ water pollution from urban wastewater ⓘ |
| hasHydropowerRoleIn | El Salvador electricity generation ⓘ |
| hasLandUse |
cropland
ⓘ
forest ⓘ pasture ⓘ urban areas ⓘ |
| hasMainRiver | Lempa River ⓘ |
| hasManagementChallenge |
balancing agricultural water use and urban supply
ⓘ
balancing hydropower and environmental flows ⓘ transboundary coordination among riparian states ⓘ |
| hasOutflow | Pacific Ocean ⓘ |
| hasRiskFrom |
climate variability
ⓘ
droughts ⓘ extreme rainfall events ⓘ |
| isKeyWaterSourceFor |
San Salvador metropolitan area
ⓘ
linked to:
Metropolitan Area of San Salvador
|
| isSubjectOf |
integrated water resources management planning
ⓘ
transboundary water management initiatives ⓘ |
| locatedIn | Central America ⓘ |
| majorPartLocatedIn | El Salvador ⓘ |
| partlyLocatedIn |
Guatemala
ⓘ
Honduras ⓘ |
| supportsEcosystem |
riparian ecosystems
ⓘ
tropical dry forests ⓘ wetlands ⓘ |
| supportsPopulationType |
rural populations
ⓘ
urban populations ⓘ |
| supportsSector |
agriculture
ⓘ
fisheries ⓘ hydropower ⓘ urban water supply ⓘ |
| transboundaryWith |
Guatemala
ⓘ
Honduras ⓘ |
| usedFor |
drinking water supply
ⓘ
hydroelectric power generation ⓘ industrial water supply ⓘ irrigation ⓘ |
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: Lempa River basin Description of subject: The Lempa River basin is a major Central American watershed, primarily in El Salvador, that drains a large region into the Pacific Ocean and supports significant agriculture, hydropower, and urban populations.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Lempa River basin