What is a watershed?

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Multiple Choice

What is a watershed?

A watershed is the land area where all precipitation and water reaching the ground—from rain, snowmelt, or groundwater—flows to a common outlet such as a river, lake, or ocean. The boundary is defined by drainage divides—the high ground that directs water to different outlets. Within a watershed, streams and other water bodies are interconnected, so activities anywhere inside can affect water quality and flow downstream. This concept differs from a small water body, which is simply the recipient of water. It’s not a man-made canal network, which is engineered, nor an area defined only by rainfall, which ignores how water moves and concentrates across the landscape.

A watershed is the land area where all precipitation and water reaching the ground—from rain, snowmelt, or groundwater—flows to a common outlet such as a river, lake, or ocean. The boundary is defined by drainage divides—the high ground that directs water to different outlets. Within a watershed, streams and other water bodies are interconnected, so activities anywhere inside can affect water quality and flow downstream. This concept differs from a small water body, which is simply the recipient of water. It’s not a man-made canal network, which is engineered, nor an area defined only by rainfall, which ignores how water moves and concentrates across the landscape.

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