Lower Basin
E713405
The Lower Basin is the downstream portion of the Colorado River Basin, encompassing states like Arizona, Nevada, and California that share allocated river water under U.S. interstate agreements.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lower Basin canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8067963 — 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: Lower Basin Context triple: [Colorado River Compact, createsDivision, Lower Basin]
-
A.
Upper Basin
The Upper Basin is the portion of the Colorado River Basin encompassing the river’s headwaters and upstream states that are allocated a collective share of the river’s water under U.S. interstate agreements.
-
B.
Main Basin
Main Basin is the central, deep-water portion of Puget Sound that forms the core of its marine ecosystem and shipping waters.
-
C.
East Basin
East Basin is the eastern section of Lake Burley Griffin in Canberra, known for its waterfront parks, walking paths, and views of key national institutions.
-
D.
Lower Mississippi River basin
The Lower Mississippi River basin is the southernmost portion of the Mississippi River drainage system, encompassing the river’s broad floodplain and delta region as it flows toward and empties into the Gulf of Mexico.
-
E.
Most Basin
The Most Basin is a coal-rich lowland region in northwestern Bohemia, Czech Republic, known for its extensive lignite mining and industrial landscape.
- 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: Lower Basin Target entity description: The Lower Basin is the downstream portion of the Colorado River Basin, encompassing states like Arizona, Nevada, and California that share allocated river water under U.S. interstate agreements.
-
A.
Upper Basin
The Upper Basin is the portion of the Colorado River Basin encompassing the river’s headwaters and upstream states that are allocated a collective share of the river’s water under U.S. interstate agreements.
-
B.
Main Basin
Main Basin is the central, deep-water portion of Puget Sound that forms the core of its marine ecosystem and shipping waters.
-
C.
East Basin
East Basin is the eastern section of Lake Burley Griffin in Canberra, known for its waterfront parks, walking paths, and views of key national institutions.
-
D.
Lower Mississippi River basin
The Lower Mississippi River basin is the southernmost portion of the Mississippi River drainage system, encompassing the river’s broad floodplain and delta region as it flows toward and empties into the Gulf of Mexico.
-
E.
Most Basin
The Most Basin is a coal-rich lowland region in northwestern Bohemia, Czech Republic, known for its extensive lignite mining and industrial landscape.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
portion of river basin
ⓘ
region ⓘ |
| bordersCountry | Mexico NERFINISHED ⓘ |
| containsMajorDam |
Davis Dam
NERFINISHED
ⓘ
Hoover Dam NERFINISHED ⓘ Parker Dam NERFINISHED ⓘ |
| containsMajorReservoir | Lake Mead NERFINISHED ⓘ |
| definedBy | Colorado River Compact of 1922 NERFINISHED ⓘ |
| governedBy | U.S. interstate water allocation agreements ⓘ |
| hasEnvironmentalConcern |
habitat loss along Colorado River corridor
ⓘ
reduced flows to Colorado River Delta ⓘ salinity management ⓘ |
| hasIssue |
climate-change-driven aridification
ⓘ
declining reservoir levels ⓘ interstate water conflicts ⓘ overallocation of water rights ⓘ |
| hasKeyCityDependentOnWater |
Las Vegas
NERFINISHED
ⓘ
Los Angeles metropolitan area NERFINISHED ⓘ Phoenix NERFINISHED ⓘ Tucson NERFINISHED ⓘ |
| hasLegalAllocationType | apportioned water rights ⓘ |
| hydrologicallyDownstreamOf | Upper Basin ⓘ |
| includesState |
Arizona
NERFINISHED
ⓘ
California NERFINISHED ⓘ Nevada NERFINISHED ⓘ |
| legalFrameworkIncludes |
Arizona v. California Supreme Court decrees
NERFINISHED
ⓘ
Boulder Canyon Project Act NERFINISHED ⓘ Law of the River NERFINISHED ⓘ |
| locatedIn |
United States of America
ⓘ
surface form:
United States
|
| partOf | Colorado River Basin NERFINISHED ⓘ |
| sharesWaterFrom | Colorado River NERFINISHED ⓘ |
| subjectTo |
drought contingency planning
ⓘ
federal water management by U.S. Bureau of Reclamation ⓘ shortage sharing agreements ⓘ |
| waterAllocatedTo |
Arizona
NERFINISHED
ⓘ
California NERFINISHED ⓘ Nevada NERFINISHED ⓘ |
| waterDeliveredVia |
All-American Canal
NERFINISHED
ⓘ
Central Arizona Project NERFINISHED ⓘ Colorado River Aqueduct NERFINISHED ⓘ |
| waterUseIncludes |
agriculture
ⓘ
environmental flows ⓘ hydropower generation ⓘ industrial use ⓘ municipal supply ⓘ |
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: Lower Basin Description of subject: The Lower Basin is the downstream portion of the Colorado River Basin, encompassing states like Arizona, Nevada, and California that share allocated river water under U.S. interstate agreements.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.