What term describes water that flows in a defined channel?

The term that accurately describes water that flows in a defined channel is "surface water." This refers specifically to water that accumulates on the surface of the earth, such as in rivers, lakes, and streams. Surface water is characterized by its visibility and the fact that it flows over the land in channels or banks. It is vital for ecosystems, agriculture, and human use.

In contrast, subterranean streams and underground streams refer to water flowing beneath the earth’s surface, typically within aquifers or other geological formations. Concurrent water is not a standardized term commonly used in hydrology or real estate. Understanding these terms is important in the context of real estate, as surface water can impact property development, land use, and environmental regulations.