Definition

1. Proper Noun:
   • Ka Long River: A river located in the northeastern part of Quang Ninh Province, Vietnam. It is approximately 70 kilometers long, with a basin area of 99 km² within Vietnamese territory.
   • A geographical feature: It originates in China and flows in a northwest-southeast direction, following a segment of the Vietnam-China border before emptying into the sea at Mong Cai.

Usage Examples

• Proper Noun:
  • Sông Ca Long chảy dọc theo biên giới. (The Ka Long River flows along the border.)
  • Cửa sông Ca Long đổ ra biển ở Móng Cái. (The mouth of the Ka Long River empties into the sea at Mong Cai.)

Advanced Usage

• The term is used almost exclusively as a proper noun to refer to this specific river. It is a key geographical landmark defining a section of the national border.

Variants and Related Words

• Sông Ca Long: The full and most common name, meaning "Ka Long River."
• Cửa sông Ca Long: Refers specifically to the river's estuary or mouth.

Synonyms

• Border river: A river that forms part of an international boundary.
• Transboundary river: A river that flows across or along political borders.

Related Terms (Geographical)

• Móng Cái: The city where the Ka Long River meets the sea.
• Quảng Ninh: The Vietnamese province where the river is located.
• Biên giới Việt-Trung: The Vietnam-China border, which the river delineates.