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A comment on River Runner: drop a raindrop anywhere in the USA, watch where it ends up. Parent comment

Re:River Runner: drop a raindrop anywhere in the USA, watch ... by jubjubbird on Thursday May 27, 2021 @12:56PM (#27305221)
And here's a USGS site that delineates a watershed from any point on a stream:

https://www.usgs.gov/mission-areas/water-resources/science/s...

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