What do we call streams that naturally dry up during periods of low rainfall?

Streams that naturally dry up during periods of low rainfall are referred to as ephemeral streams. This term specifically describes water bodies that only flow for a short period of time, typically after heavy rain, and do not maintain a consistent flow throughout the year. During dry seasons or periods of low precipitation, these streams may completely dry up.

In contrast, seasonal streams may flow during specific times of the year, such as during a rainy season but not necessarily drying up completely. Intermittent streams have periods of flow that may vary but can still have some water during dry periods, while permanent streams maintain a constant flow year-round regardless of rainfall patterns. Understanding these distinctions helps clarify the behavior of different types of water bodies and their ecological roles.