Watershed Lesson

How is water flow related to contour lines on a topographic map?

• Water flow is in the same direction as the contour lines.

• Water flow is not related to contour lines.

• Water flow is perpendicular to contour lines.

• Water flow is parallel to contour lines.

What defines a watershed?

• The highest point in an area.

• A specific type of vegetation.

• A body of water such as a lake or ocean.

• The entire drainage area of a major river or its tributaries.

How do contour lines behave in relation to a stream's flow direction?

• Contour lines always run parallel to the stream.

• Contour lines cross the stream at right angles.

• Contour lines form circles around the stream.

• Contour lines always point upstream.

What is the highest point upstream in a watershed called?

• The watershed outlet.

• The head of the watershed.

• The watershed midpoint.

• The watershed boundary.

What is the first step in drawing a watershed boundary?

• Marking the midpoint of the watercourse.

• Drawing a line connecting the high points.

• Identifying the lowest contour line.

• Drawing a circle at the outlet of the wetland.

How should lines be drawn when delineating a watershed boundary?

• Following the direction of the water flow.

• In a zigzag pattern across the watercourse.

• At right angles to the contour lines.

• Parallel to the watercourse.

What is the final step in delineating a watershed boundary?

• Identifying all watercourses within the watershed.

• Marking the watershed's lowest point.

• Connecting the line back to the starting circle.

• Drawing a circle around the high points.

What is the significance of the delineated watershed boundary?

• It determines the highest elevation points in the area.

• It outlines the area where surface water runoff flows into and out of a wetland.

• It indicates regions prone to flooding.

• It marks the area for potential urban development.