Question

According to Strahler’s stream ordering system, what is the highest order of stream in the given diagram?

• A. 4
• B. 3
• C. 2
• D. 1

Answer 1

The Correct Option is B

Strahler’s Stream Ordering System 

Understanding the Stream Ordering System

Strahler’s stream ordering system assigns an order to each stream based on its position in the network. The rules for stream order classification are:

• First-order streams: These are the smallest streams with no tributaries.
• Second-order streams: Formed by the confluence of two first-order streams.
• Third-order streams: Formed by the confluence of two second-order streams.
• Higher-order streams: Continue to form when two streams of the same order meet.

Step 1: Identifying the Highest Order Stream

Based on the given diagram:

• Two first-order streams combine to form a second-order stream.
• Two second-order streams combine to form a third-order stream.

Step 2: Determining the Highest Order

According to the given diagram, the highest order stream present is:

\[ \mathbf{Third\text{-}Order\ Stream} \]

Final Answer:

Thus, the highest order stream in the given diagram is a third-order stream, as it results from the confluence of two second-order streams.