A river emerging from underground is often referred to as a?

A river emerging from underground is referred to as a resurgence river, commonly known as a spring. This term specifically describes where groundwater flows to the surface, typically emerging at the point where the water table intersects with the land surface. The water often comes from subsurface aquifers that have been pressured to a point where it naturally flows out, creating a consistent water source.

The term "spring" may also be used more broadly, but in the context of hydrology, a resurgence river particularly emphasizes the river's flow characteristics and its geological origin. Springs can vary in discharge and temperature and contribute significantly to the hydrology of the area, supplying water to nearby rivers or lakes directly.

In other choices, “creek” and “stream” refer to smaller bodies of flowing water but do not specifically denote their emergence from underground sources. These terms are more general and describe the size or type of watercourse rather than its geological origin.