Head of tide

The term **"head of tide"** refers to the point upstream in a river or estuary where the influence of tidal ebb and flow ceases and fresh water dominates the environment. Beyond this point, the river typically experiences freshwater flow without the effects of tidal fluctuations, such as rising and falling water levels that are driven by ocean tides. The head of tide can vary based on several factors, including geographical features, the phase of the moon, and hydrological conditions.