San Francisco Peninsula watershed
E584942
The San Francisco Peninsula watershed is the network of creeks, reservoirs, and drainage basins that collect and channel water across the San Francisco Peninsula into the Pacific Ocean and San Francisco Bay.
All labels observed (5)
How this entity was disambiguated
This entity first appeared as the object of triple T6315295 — 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: San Francisco Peninsula watershed Context triple: [San Andreas Dam, partOf, San Francisco Peninsula watershed]
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A.
Sonoma Creek watershed
The Sonoma Creek watershed is a drainage basin in Sonoma County, California, that collects runoff from the Mayacamas Mountains and surrounding landscapes before flowing into San Pablo Bay.
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B.
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.
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C.
Santa Clara River watershed
The Santa Clara River watershed is a major river basin in Southern California that drains diverse mountain and valley landscapes before emptying into the Pacific Ocean near Ventura.
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D.
Sacramento–San Joaquin River Delta and Suisun Marsh
The Sacramento–San Joaquin River Delta and Suisun Marsh is a vast, ecologically rich estuarine region in Northern California that serves as a critical hub for the state’s water supply, wildlife habitat, and agricultural activity.
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E.
Sacramento–San Joaquin River Delta
The Sacramento–San Joaquin River Delta is a vast inland estuarine network of rivers, channels, and wetlands in Northern California that forms the state’s largest freshwater tidal ecosystem and a critical hub for its water supply and agriculture.
- 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: San Francisco Peninsula watershed Target entity description: The San Francisco Peninsula watershed is the network of creeks, reservoirs, and drainage basins that collect and channel water across the San Francisco Peninsula into the Pacific Ocean and San Francisco Bay.
-
A.
Sonoma Creek watershed
The Sonoma Creek watershed is a drainage basin in Sonoma County, California, that collects runoff from the Mayacamas Mountains and surrounding landscapes before flowing into San Pablo Bay.
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B.
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.
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C.
Santa Clara River watershed
The Santa Clara River watershed is a major river basin in Southern California that drains diverse mountain and valley landscapes before emptying into the Pacific Ocean near Ventura.
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D.
Sacramento–San Joaquin River Delta and Suisun Marsh
The Sacramento–San Joaquin River Delta and Suisun Marsh is a vast, ecologically rich estuarine region in Northern California that serves as a critical hub for the state’s water supply, wildlife habitat, and agricultural activity.
-
E.
Sacramento–San Joaquin River Delta
The Sacramento–San Joaquin River Delta is a vast inland estuarine network of rivers, channels, and wetlands in Northern California that forms the state’s largest freshwater tidal ecosystem and a critical hub for its water supply and agriculture.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
drainage basin network
ⓘ
watershed ⓘ |
| affectedBy |
climate variability
ⓘ
impervious surfaces ⓘ land development ⓘ |
| characterizedBy |
multiple drainage basins
ⓘ
network of creeks ⓘ network of reservoirs ⓘ |
| drainsInto |
Pacific Ocean
NERFINISHED
ⓘ
San Francisco Bay NERFINISHED ⓘ |
| function |
channel water to Pacific Ocean and San Francisco Bay
ⓘ
collect water across the San Francisco Peninsula ⓘ |
| hasPart |
creek network
ⓘ
drainage basins ⓘ reservoir network ⓘ |
| hasProcess |
groundwater recharge
ⓘ
nutrient cycling ⓘ sediment transport ⓘ surface runoff collection ⓘ |
| hydrologicallyAssociatedWith |
Pacific coastal watersheds of California
ⓘ
San Francisco Bay watershed NERFINISHED ⓘ |
| includesHydrologicFeatureType |
intermittent streams
ⓘ
perennial streams ⓘ riparian corridors ⓘ urban storm drains ⓘ |
| influencedBy |
Mediterranean climate
ⓘ
summer dry season ⓘ winter rainfall patterns ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco Peninsula NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| managedBy |
local water agencies
ⓘ
municipal governments ⓘ regional environmental organizations ⓘ |
| partOf | Northern California coastal watersheds region NERFINISHED ⓘ |
| subjectTo |
habitat fragmentation
ⓘ
stormwater pollution ⓘ urban runoff ⓘ |
| supports |
aquatic ecosystems
ⓘ
fish populations ⓘ riparian vegetation ⓘ wildlife corridors ⓘ |
| usedFor |
flood control
ⓘ
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: San Francisco Peninsula watershed Description of subject: The San Francisco Peninsula watershed is the network of creeks, reservoirs, and drainage basins that collect and channel water across the San Francisco Peninsula into the Pacific Ocean and San Francisco Bay.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
San Francisco Watershed lands
this entity surface form:
San Francisco Public Utilities Commission watershed system
this entity surface form:
San Francisco Bay hydrologic region
this entity surface form:
San Francisco Peninsula watershed area