California portion of Truckee River Basin
E522788
The California portion of the Truckee River Basin is the upstream segment of the Truckee River watershed located within California, encompassing Lake Tahoe’s outflow and surrounding tributaries before the river crosses into Nevada.
All labels observed (1)
| Label | Occurrences |
|---|---|
| California portion of Truckee River Basin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5487175 — 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: California portion of Truckee River Basin Context triple: [Truckee River Operating Agreement, geographicScope, California portion of Truckee River Basin]
-
A.
San Joaquin River Basin
The San Joaquin River Basin is a major watershed in California’s Central Valley that drains the San Joaquin River and its tributaries, supporting extensive agriculture, ecosystems, and communities.
-
B.
Sacramento River Basin
The Sacramento River Basin is a major watershed in Northern California that drains the Sacramento River and its tributaries, supporting extensive agriculture, ecosystems, and water supply for the region.
-
C.
Truckee River
The Truckee River is a prominent river in the western United States that flows from Lake Tahoe in the Sierra Nevada through Nevada to Pyramid Lake, providing vital water resources and recreational opportunities to the region.
-
D.
Kaweah River watershed
The Kaweah River watershed is a mountainous drainage basin in California’s southern Sierra Nevada that channels snowmelt and rainfall through steep canyons and forests before flowing into the San Joaquin Valley.
-
E.
San Francisco River basin
The San Francisco River basin is a watershed in Bogotá that drains the slopes of the Eastern Hills and channels water through part of the city’s urban area.
- 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: California portion of Truckee River Basin Target entity description: The California portion of the Truckee River Basin is the upstream segment of the Truckee River watershed located within California, encompassing Lake Tahoe’s outflow and surrounding tributaries before the river crosses into Nevada.
-
A.
San Joaquin River Basin
The San Joaquin River Basin is a major watershed in California’s Central Valley that drains the San Joaquin River and its tributaries, supporting extensive agriculture, ecosystems, and communities.
-
B.
Sacramento River Basin
The Sacramento River Basin is a major watershed in Northern California that drains the Sacramento River and its tributaries, supporting extensive agriculture, ecosystems, and water supply for the region.
-
C.
Truckee River
The Truckee River is a prominent river in the western United States that flows from Lake Tahoe in the Sierra Nevada through Nevada to Pyramid Lake, providing vital water resources and recreational opportunities to the region.
-
D.
Kaweah River watershed
The Kaweah River watershed is a mountainous drainage basin in California’s southern Sierra Nevada that channels snowmelt and rainfall through steep canyons and forests before flowing into the San Joaquin Valley.
-
E.
San Francisco River basin
The San Francisco River basin is a watershed in Bogotá that drains the slopes of the Eastern Hills and channels water through part of the city’s urban area.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
river basin segment
ⓘ
watershed ⓘ |
| borderCrossingPoint | California–Nevada state line near Truckee River NERFINISHED ⓘ |
| contains |
Lake Tahoe outflow
ⓘ
Truckee River headwaters ⓘ tributary streams to Truckee River in California ⓘ upper Truckee River watershed ⓘ |
| containsCity | Truckee, California NERFINISHED ⓘ |
| containsCommunity |
Incline Village, Nevada
NERFINISHED
ⓘ
Kings Beach, California NERFINISHED ⓘ Tahoe City, California NERFINISHED ⓘ Tahoe Vista, California NERFINISHED ⓘ |
| containsProtectedArea |
Lake Tahoe Basin Management Unit
NERFINISHED
ⓘ
Tahoe National Forest NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| drainsInto | Truckee River NERFINISHED ⓘ |
| ecoregion | Sierra Nevada ecoregion NERFINISHED ⓘ |
| hasClimate |
Mediterranean-influenced mountain climate
ⓘ
snow-dominated hydrology ⓘ |
| hasEnvironmentalIssue |
nutrient loading to Lake Tahoe
ⓘ
sediment loading to Lake Tahoe ⓘ |
| hasInterstateWaterAgreement |
Truckee River Basin water allocation compacts
NERFINISHED
ⓘ
Truckee River Operating Agreement NERFINISHED ⓘ |
| hasLandUse |
forests
ⓘ
recreation areas ⓘ transportation corridors ⓘ urban areas ⓘ |
| hasMajorHighway |
California State Route 28
NERFINISHED
ⓘ
California State Route 89 NERFINISHED ⓘ Interstate 80 NERFINISHED ⓘ |
| hasOutflowControlStructure | Lake Tahoe Dam at Tahoe City NERFINISHED ⓘ |
| hasPrimaryWaterSource | snowmelt ⓘ |
| hasRegulatingAgency |
California Department of Water Resources
NERFINISHED
ⓘ
Lahontan Regional Water Quality Control Board NERFINISHED ⓘ |
| hasWaterManagementConcern |
ecosystem restoration
ⓘ
flood control ⓘ recreation management ⓘ water quality protection ⓘ |
| hydrologicallyConnectedTo | Nevada portion of Truckee River Basin ⓘ |
| includesWaterBody | Lake Tahoe NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Sierra Nevada NERFINISHED ⓘ |
| partOf | Truckee River Basin NERFINISHED ⓘ |
| primaryRiver | Truckee River NERFINISHED ⓘ |
| receivesPrecipitationAs |
rain
ⓘ
snow ⓘ |
| supportsUse |
hydropower generation
ⓘ
municipal water supply ⓘ recreation and tourism ⓘ |
| upstreamOf | Nevada portion of Truckee River Basin ⓘ |
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: California portion of Truckee River Basin Description of subject: The California portion of the Truckee River Basin is the upstream segment of the Truckee River watershed located within California, encompassing Lake Tahoe’s outflow and surrounding tributaries before the river crosses into Nevada.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.