Ohau River
E860191
The Ohau River is a river in New Zealand’s South Island that drains Lake Ōhau and contributes to the Waitaki hydroelectric system before joining the Waitaki River.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ohau River canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6201938 — 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: Ohau River Context triple: [Waitaki River, hasTributary, Ohau River]
-
A.
Pukaki River
The Pukaki River is a glacial-fed river in New Zealand’s South Island that drains Lake Pukaki and contributes to the region’s hydroelectric power system.
-
B.
Kaiapoi River
The Kaiapoi River is a waterway in the Canterbury region of New Zealand’s South Island that flows through the town of Kaiapoi before joining the Waimakariri River.
-
C.
Tiraumea River
The Tiraumea River is a river in New Zealand’s North Island that flows through the Manawatū-Whanganui region before joining the Manawatū River.
-
D.
Kerio River
The Kerio River is a major river in Kenya that drains the western highlands and flows northward through the Kerio Valley before emptying into Lake Turkana.
-
E.
Hawea River
The Hawea River is a short, fast-flowing river in New Zealand’s South Island that drains Lake Hāwea and is known for hydroelectric generation and outdoor recreation such as fishing and kayaking.
- 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: Ohau River Target entity description: The Ohau River is a river in New Zealand’s South Island that drains Lake Ōhau and contributes to the Waitaki hydroelectric system before joining the Waitaki River.
-
A.
Pukaki River
The Pukaki River is a glacial-fed river in New Zealand’s South Island that drains Lake Pukaki and contributes to the region’s hydroelectric power system.
-
B.
Kaiapoi River
The Kaiapoi River is a waterway in the Canterbury region of New Zealand’s South Island that flows through the town of Kaiapoi before joining the Waimakariri River.
-
C.
Tiraumea River
The Tiraumea River is a river in New Zealand’s North Island that flows through the Manawatū-Whanganui region before joining the Manawatū River.
-
D.
Kerio River
The Kerio River is a major river in Kenya that drains the western highlands and flows northward through the Kerio Valley before emptying into Lake Turkana.
-
E.
Hawea River
The Hawea River is a short, fast-flowing river in New Zealand’s South Island that drains Lake Hāwea and is known for hydroelectric generation and outdoor recreation such as fishing and kayaking.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | New Zealand NERFINISHED ⓘ |
| contributesTo | Waitaki hydroelectric system NERFINISHED ⓘ |
| country | New Zealand ⓘ |
| drains | Lake Ōhau NERFINISHED ⓘ |
| elevationSourceApprox | about 520 metres above sea level (Lake Ōhau) ⓘ |
| environmentalIssue |
effects on aquatic habitat
ⓘ
flow regulation for power generation ⓘ |
| flowsDirectionGeneral |
east
ⓘ
southeast ⓘ |
| flowsInto |
Lake Benmore (via canal system)
NERFINISHED
ⓘ
Lake Ruataniwha (via canal system) NERFINISHED ⓘ |
| flowsThrough | artificial canals ⓘ |
| governedBy | New Zealand freshwater management regulations ⓘ |
| hasCatchment | Southern Alps region NERFINISHED ⓘ |
| hasDam |
Ohau A Power Station
NERFINISHED
ⓘ
Ohau B Power Station NERFINISHED ⓘ Ohau C Power Station NERFINISHED ⓘ |
| hasFeature | glacially fed headwaters (via Lake Ōhau) ⓘ |
| hasInfrastructure |
Ohau B–C Canal
NERFINISHED
ⓘ
Ohau Canal NERFINISHED ⓘ control gates and weirs ⓘ |
| hasNearbyLake |
Lake Benmore
NERFINISHED
ⓘ
Lake Pukaki (within wider scheme) ⓘ Lake Ruataniwha NERFINISHED ⓘ |
| hasNearbySettlement | Ōhau (locality) NERFINISHED ⓘ |
| hasOfficialName | Ōhau River NERFINISHED ⓘ |
| hasRecreation |
boating (on associated lakes and canals)
ⓘ
fishing ⓘ |
| isTributaryOf | Waitaki River NERFINISHED ⓘ |
| languageOfName | Māori ⓘ |
| locatedIn |
Canterbury region
NERFINISHED
ⓘ
Mackenzie Basin NERFINISHED ⓘ South Island ⓘ |
| locatedNear |
Aoraki / Mount Cook National Park
NERFINISHED
ⓘ
Twizel NERFINISHED ⓘ |
| mouth | Waitaki River NERFINISHED ⓘ |
| partOf |
Canterbury water catchment
ⓘ
New Zealand hydroelectric network ⓘ Upper Waitaki Power Scheme NERFINISHED ⓘ Waitaki River system NERFINISHED ⓘ |
| regionHydrology | Upper Waitaki hydro scheme NERFINISHED ⓘ |
| source | Lake Ōhau NERFINISHED ⓘ |
| usedFor |
hydroelectric power generation
ⓘ
irrigation (downstream via Waitaki system) ⓘ |
| waterManagedBy | Meridian Energy NERFINISHED ⓘ |
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: Ohau River Description of subject: The Ohau River is a river in New Zealand’s South Island that drains Lake Ōhau and contributes to the Waitaki hydroelectric system before joining the Waitaki River.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.