Ottawa River watershed

E325020

drainage basin river basin watershed

The Ottawa River watershed is the drainage basin that collects and channels water from a vast area of eastern Ontario and western Quebec into the Ottawa River, influencing regional ecosystems, water resources, and communities.

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All labels observed (6)

Label	Occurrences
Ottawa River basin	13
Ottawa River watershed canonical	11
Ottawa River drainage basin	8
Ottawa River system	2
Ottawa River valley	2
Ottawa River corridor	1

How this entity was disambiguated

This entity first appeared as the object of triple T3079425 — 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: Ottawa River watershed
Context triple: [Ottawa River, locatedInWatershed, Ottawa River watershed]

A. Ottawa River
The Ottawa River is a major waterway in eastern Canada that forms much of the border between Ontario and Quebec and is a key tributary of the Saint Lawrence River.
B. Grand River watershed
The Grand River watershed is the drainage basin of Michigan’s longest river, encompassing the land area whose surface water ultimately flows into the Grand River and then into Lake Michigan.
C. Ottawa Valley
The Ottawa Valley is a region in eastern Ontario, Canada, known for the Ottawa River, rural communities, and outdoor recreation such as hiking, canoeing, and camping.
D. Gatineau River
The Gatineau River is a major waterway in western Quebec that flows south through the Gatineau Valley before joining the Ottawa River near Canada’s National Capital Region.
E. Labrador River
The Labrador River is a major waterway in the Labrador region of eastern Canada, contributing significantly to the area's drainage system and natural 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: Ottawa River watershed
Target entity description: The Ottawa River watershed is the drainage basin that collects and channels water from a vast area of eastern Ontario and western Quebec into the Ottawa River, influencing regional ecosystems, water resources, and communities.

A. Ottawa River
The Ottawa River is a major waterway in eastern Canada that forms much of the border between Ontario and Quebec and is a key tributary of the Saint Lawrence River.
B. Grand River watershed
The Grand River watershed is the drainage basin of Michigan’s longest river, encompassing the land area whose surface water ultimately flows into the Grand River and then into Lake Michigan.
C. Ottawa Valley
The Ottawa Valley is a region in eastern Ontario, Canada, known for the Ottawa River, rural communities, and outdoor recreation such as hiking, canoeing, and camping.
D. Gatineau River
The Gatineau River is a major waterway in western Quebec that flows south through the Gatineau Valley before joining the Ottawa River near Canada’s National Capital Region.
E. Labrador River
The Labrador River is a major waterway in the Labrador region of eastern Canada, contributing significantly to the area's drainage system and natural landscape.
F. None of above. chosen

Statements (53)

Predicate	Object
instanceOf	drainage basin ⓘ river basin ⓘ watershed ⓘ
containsCity	Gatineau ⓘ Hull, Quebec ⓘ Ottawa ⓘ Pembroke, Ontario ⓘ
containsFeature	floodplains ⓘ forests ⓘ lakes ⓘ wetlands ⓘ
containsTown	Deep River, Ontario ⓘ Maniwaki, Quebec ⓘ linked to: Maniwaki Mattawa, Ontario ⓘ
country	Canada ⓘ
crossesBorder	Ontario–Quebec border ⓘ linked to: Quebec–Ontario border
drainsInto	Ottawa River ⓘ
environmentalIssue	flooding risk ⓘ habitat fragmentation ⓘ water quality concerns ⓘ
hasLandUse	agriculture ⓘ forestry ⓘ urban development ⓘ
hasLanguageRegion	English-speaking communities ⓘ French-speaking communities ⓘ
hasMajorRiver	Ottawa River ⓘ
hasOutlet	Ottawa River ⓘ
hasTributary	Bonnechere River ⓘ Coulonge River ⓘ Dumoine River ⓘ Gatineau River ⓘ Lièvre River ⓘ Madawaska River ⓘ Mattawa River ⓘ Mississippi River (Ontario) ⓘ Noire River (Quebec) ⓘ Petawawa River ⓘ Rideau River ⓘ Rouge River (Quebec) ⓘ South Nation River ⓘ
influences	human communities ⓘ regional ecosystems ⓘ water resources ⓘ
locatedIn	Canada ⓘ Ontario ⓘ Quebec ⓘ linked to: Quebec, Canada
managedBy	Ottawa River Regulation Planning Board ⓘ
partOf	St. Lawrence River drainage basin ⓘ
region	eastern Ontario ⓘ linked to: Eastern Ontario western Quebec ⓘ
supportsActivity	commercial navigation ⓘ hydroelectric power generation ⓘ recreation ⓘ

How these facts were elicited