Colorado River Basin
E321362
The Colorado River Basin is the vast watershed in the western United States and northern Mexico that collects and channels water from multiple states and tributaries into the Colorado River, supporting major ecosystems, agriculture, and cities across an arid region.
All labels observed (10)
How this entity was disambiguated
This entity first appeared as the object of triple T2638856 — 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: Colorado River Basin Context triple: [Eldorado Mountains, drainageBasin, Colorado River Basin]
-
A.
San Luis Rey River basin
The San Luis Rey River basin is a watershed region in northern San Diego County, California, that has long served as the homeland and cultural heartland of the Luiseño people.
-
B.
Mono River basin
The Mono River basin is a West African watershed spanning parts of Togo and Benin, known for its role in regional agriculture, hydropower, and biodiversity.
-
C.
San Juan River basin
The San Juan River basin is a Central American watershed that drains Lake Nicaragua and surrounding regions through the San Juan River toward the Caribbean Sea.
-
D.
Missouri River Basin
The Missouri River Basin is a vast drainage area in the central United States that collects water from the Missouri River and its tributaries across multiple states and parts of Canada.
-
E.
Colorado River
The Colorado River is a major waterway of the southwestern United States and northern Mexico, renowned for carving the Grand Canyon and serving as a crucial water source for arid regions and Indigenous 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: Colorado River Basin Target entity description: The Colorado River Basin is the vast watershed in the western United States and northern Mexico that collects and channels water from multiple states and tributaries into the Colorado River, supporting major ecosystems, agriculture, and cities across an arid region.
-
A.
San Luis Rey River basin
The San Luis Rey River basin is a watershed region in northern San Diego County, California, that has long served as the homeland and cultural heartland of the Luiseño people.
-
B.
Mono River basin
The Mono River basin is a West African watershed spanning parts of Togo and Benin, known for its role in regional agriculture, hydropower, and biodiversity.
-
C.
San Juan River basin
The San Juan River basin is a Central American watershed that drains Lake Nicaragua and surrounding regions through the San Juan River toward the Caribbean Sea.
-
D.
Missouri River Basin
The Missouri River Basin is a vast drainage area in the central United States that collects water from the Missouri River and its tributaries across multiple states and parts of Canada.
-
E.
Colorado River
The Colorado River is a major waterway of the southwestern United States and northern Mexico, renowned for carving the Grand Canyon and serving as a crucial water source for arid regions and Indigenous communities.
- F. None of above. chosen
Statements (90)
| Predicate | Object |
|---|---|
| instanceOf |
drainage basin
ⓘ
river basin ⓘ watershed ⓘ |
| area |
approximately 246000 square miles
ⓘ
approximately 637000 square kilometers ⓘ |
| climate |
arid
ⓘ
semi-arid ⓘ |
| containsCity |
Denver–Aurora–Lakewood metropolitan area
ⓘ
surface form:
Denver metropolitan area (partially via transbasin diversions)
Las Vegas, Nevada ⓘ
surface form:
Las Vegas
Los Angeles (served via imported Colorado River water) ⓘ Mexicali ⓘ Phoenix ⓘ Salt Lake City (partially via diversions) ⓘ San Diego (served via imported Colorado River water) ⓘ Tucson ⓘ Yuma, Arizona ⓘ
surface form:
Yuma
|
| country |
Mexico
ⓘ
United States of America ⓘ
surface form:
United States
|
| crossesEcoregion |
Baja California desert
ⓘ
surface form:
Baja California Desert
Colorado Plateau ⓘ Mojave Desert ⓘ Rocky Mountains ⓘ Sonoran Desert ⓘ |
| drainedBy | Colorado River ⓘ |
| drainsInto | Gulf of California ⓘ |
| facesIssue |
chronic water scarcity
ⓘ
climate change impacts ⓘ declining reservoir levels ⓘ drought ⓘ ecosystem degradation ⓘ overallocation of water rights ⓘ salinity problems ⓘ |
| governedBy |
Colorado River Compact
ⓘ
Law of the River ⓘ Mexican Water Treaty of 1944 ⓘ Upper Colorado River Basin Compact ⓘ |
| hasMajorDam |
Davis Dam
ⓘ
Glen Canyon Dam ⓘ Hoover Dam ⓘ Imperial Dam ⓘ Parker Dam ⓘ |
| hasMajorReservoir |
Lake Havasu
ⓘ
Lake Mead ⓘ Lake Powell ⓘ |
| hasRegion |
Lower Colorado River region
ⓘ
surface form:
Lower Colorado River Basin
Colorado River Basin self-linksurface differs ⓘ
surface form:
Upper Colorado River Basin
|
| hasTributary |
Bill Williams River
NERFINISHED
ⓘ
Dolores River ⓘ Gila River ⓘ Green River ⓘ Gunnison River ⓘ Little Colorado River ⓘ Paria River ⓘ San Juan River ⓘ Virgin River ⓘ |
| includesState |
Arizona
ⓘ
California, United States ⓘ
surface form:
California
Colorado ⓘ Baja California ⓘ
surface form:
Mexico (Baja California and Sonora)
Nevada ⓘ New Mexico ⓘ Texas (small portion) ⓘ Utah ⓘ Wyoming ⓘ |
| irrigatesArea |
Central Arizona Project
ⓘ
surface form:
Central Arizona Project service area
Imperial Valley ⓘ Yuma Valley ⓘ |
| locatedIn |
Northern Mexico
ⓘ
western United States ⓘ
surface form:
Western United States
|
| mainPrecipitationSource | snowpack in the Rocky Mountains ⓘ |
| managedBy |
Bureau of Reclamation
ⓘ
surface form:
U.S. Bureau of Reclamation
binational institutions of the United States and Mexico ⓘ state water agencies ⓘ |
| populationServed | approximately 40 million people ⓘ |
| supportsEcosystem |
Colorado River Delta
ⓘ
desert wetlands ⓘ riparian habitats ⓘ |
| supportsSector |
agriculture
ⓘ
energy production ⓘ tourism and recreation ⓘ urban development ⓘ |
| supportsSpecies |
Ridgway's rail
ⓘ
surface form:
Yuma clapper rail
endangered fish species such as humpback chub ⓘ endangered fish species such as razorback sucker ⓘ southwestern willow flycatcher ⓘ |
| usedFor |
hydroelectric power generation
ⓘ
industrial water use ⓘ irrigation ⓘ municipal water supply ⓘ recreation ⓘ |
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: Colorado River Basin Description of subject: The Colorado River Basin is the vast watershed in the western United States and northern Mexico that collects and channels water from multiple states and tributaries into the Colorado River, supporting major ecosystems, agriculture, and cities across an arid region.
Referenced by (58)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River watershed
this entity surface form:
Grand Canyon drainage basin
this entity surface form:
Colorado River watershed
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River Valley
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River Valley
this entity surface form:
Colorado River basin
this entity surface form:
Upper Colorado River system
this entity surface form:
Upper Colorado River Basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River watershed
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River watershed
this entity surface form:
Colorado River basin (pre-diversion natural outflow to Gulf of California)
this entity surface form:
Colorado River basin
this entity surface form:
Colorado River hydrologic region (USGS classification context)
this entity surface form:
Colorado River watershed
subject surface form:
Beaver Creek (Arizona)
this entity surface form:
Colorado River basin