Science · 6 pages · 12 min
How a watershed is drawn
A watershed is the land inside the divide that drains to one chosen point on a stream.
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From the opening
A watershed is the land area that drains to a chosen point on a stream. You draw it by tracing the divide, the high line where water on one side runs toward that point and water on the other side runs somewhere else. The opening covers start at the outlet and follow ridges, why pipes can redraw the basin, and how small basins nest in large ones.
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Inside
- Start at the outlet and follow ridges
- Why pipes can redraw the basin
- How small basins nest in large ones
- When groundwater crosses the divide
- Where the idea stops applying
- A distinction worth keeping
Sources
- Drainage divides drawn from topography
- Nested watersheds defined by a chosen outlet