Stream Competence Explained
Stream competence refers to the maximum particle size that a river can transport. It is a measure of a stream's ability to move different sediment sizes.
Sediment Transport and Particle Size
A stream's competence is directly related to its velocity and energy. Higher velocity streams have greater energy and thus can transport larger, heavier sediment particles.
- Low velocity streams generally transport smaller sediments like sand and silt.
- High velocity streams have the energy to transport larger sediments like gravel, cobbles, and even boulders.
Therefore, stream competence specifically denotes the transport of the largest size sediment particle a stream is capable of moving at a given flow.
Based on this definition, the correct option is the one indicating the transport of the largest sediment size.
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