Definition

1. Noun:
   • Heavy rain at river sources: Refers to intense rainfall that occurs specifically in the headwater or source regions of rivers. This term emphasizes the location and type of precipitation.
   • Rainfall in the riverhead area: Describes rain falling in the upland areas where a river begins, which is crucial for feeding the river system.

Usage Examples

• Noun:
  • Mưa nguồn đã làm mực nước sông dâng cao. (Heavy rain at the river sources has caused the river water level to rise.)
  • Dự báo có mưa nguồn trên các vùng thượng lưu. (Forecasts predict rainfall in the riverhead areas of the upper regions.)

Advanced Usage

• The term is often used in hydrology, weather forecasting, and disaster management contexts to discuss factors leading to river flooding or increased water flow downstream.

Variants and Related Words

• Lũ lụt (n): flood, often a consequence of persistent .
• Thượng nguồn (n): upstream, headwaters; the area where typically occurs.

Synonyms

• Headwater rains: Rain occurring at the sources of rivers.
• Upland rainfall: Precipitation in elevated river source areas.

Related Concepts

• Lũ quét (flash flood): A rapid, destructive flood that can be triggered by sudden in mountainous areas.
• Nước lũ (floodwater): The high volume of water resulting from such rains moving downstream.

1. Heavy rain at river sources