Surface Water

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Across
  1. 2. Over time, nutrients can build up in the lake in this process.
  2. 6. The land area that supplies water to a river system.
  3. 7. One watershed is separated from another by this ridge of land.
  4. 8. This and lakes form when water collects in hollows and low-lying areas of land.
Down
  1. 1. This river's watershed covers 1/3 of the United States.
  2. 3. The streams and smaller rivers that feed into a main river.
  3. 4. This is the longest Divide in North America.
  4. 5. A lake that stores water for human use