Watershed and multiple pour points

01-27-2021 10:13 AM
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Hi, i trying to solve a task from my school. I doing a watershed and are going to use multiple pour point to find out from were a toxic sample has its origin from a river. I want to clarify:

A watershed is a area were water are flowing to the river or lake, right? I got a one color black area marked after i do the watershed method, and i dont really know what it means.

A pour point is were water flowing out of the lake, am i right?

How could i  find out with multiple pour points were the that toxity has its origin? How could multiple pour points constraint my search field?

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