Which types of tides are identified in tidal studies?

In tidal studies, the recognized types of tides are diurnal, semi-diurnal, and mixed. Diurnal tides are those that have one high tide and one low tide each lunar day, which spans approximately 24 hours. Semi-diurnal tides feature two high tides and two low tides each lunar day, with both high tides typically being of similar height. Mixed tides are characterized by a combination of both diurnal and semi-diurnal patterns, leading to variations in the height of the high and low tides.

The identification of these specific categories is crucial for understanding tidal movements and their effects on navigation and coastal management. By differentiating between these types, mariners and coastal engineers can more accurately predict tidal conditions, which is essential for safe navigation, fishing activities, and the management of coastal infrastructure. The other options do not reflect the recognized classifications in tidal studies. For example, monthly or yearly terms do not specifically classify tide patterns, and high and low refer more to the state of the tide at any given time rather than distinct categories of tidal behavior.