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Which river pattern is most associated with high sediment load and variable discharge ?

ADendritic

BRectangular

CBraided

DTrellis

Answer:

C. Braided

Read Explanation:

Braided River Patterns

  • Formation: Braided rivers develop when a stream's capacity to transport sediment is exceeded by its actual sediment load. This forces the river to deposit excess material in the channel, creating temporary islands known as eyots or braids.

  • Key Characteristics: These rivers are characterized by a wide, shallow, and unstable channel network that frequently splits and reunites.

  • Hydrological Conditions: They are highly associated with variable discharge, often occurring in environments with rapid seasonal changes in water volume, such as glacial meltwater zones or arid regions with flash flooding.

  • Sediment Dynamics: High sediment loads, typically dominated by coarse-grained materials like sand and gravel, are essential for the formation of these patterns.

  • Geographic Significance: In the Indian subcontinent, the Brahmaputra River is a classic example of a braided river system, particularly as it exits the Himalayas and enters the plains of Assam.

  • Distinction: Unlike meandering rivers, which generally maintain a single, sinuous channel in stable, low-gradient landscapes, braided systems are dynamic and prone to significant channel shifting during high-flow events.


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