Answer
A gaining stream and a losing stream are two types of streams based on their interaction with groundwater. A gaining stream is one in which water is added to the streambed from the inflow of groundwater. These streams typically have a constant flow, even during dry periods, because they are recharged by groundwater. In contrast, a losing stream is one in which water seeps into the ground and contributes to the groundwater system, leading to a decrease in surface flow. Losing streams may lose water during dry periods and may only flow after heavy rainfall or snowmelt replenishes the groundwater supply.
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