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In coastal oceanography, the terms ebb and flood refer to tidal currents. These terms are particularly relevant for tidal inlet systems: estuaries, tidal rivers and lagoons. The ebb current corresponds to seaward flow and the flood current to landward flow.
The incoming tide along the coast and into the bays and estuaries is called a flood current; the outgoing tide is called an ebb current. The strongest flood and ebb currents usually occur before or near the time of the high and low tides. The weakest currents occur between the flood and ebb currents and are called "slack water" or "slack current".
Sea level rises over several hours, covering the intertidal zone; flood tide. The water stops rising, reaching a local maximum called high tide. Sea level falls over several hours, revealing the intertidal zone; ebb tide. Oscillating currents produced by tides are known as tidal streams or tidal currents.
3 de sept. de 2014 · Ebb is the decreasing tide while flood tide is the increasing. The moment the tide changes is called slack water. There is 6 hours between each high and low.
ebb tide, seaward flow in estuaries or tidal rivers during a tidal phase of lowering water level. The reverse flow, occurring during rising tides, is called the flood tide.
28 de mar. de 2023 · Tides are another type of wave motion – a change in the ocean water level that typically reaches a high and low twice a day, about six hours apart (called a semi-diurnal tide). The change from low to high tide is called the "flood tide" or “flow”. The change from high to low tide is called the "ebb tide". Tides result from the ...
flood current: the current that runs while the tide is rising ebb current: the current that runs while the tide is falling slack water: the period of no tidal current while the tide reverses (Note: the concept of slack water is relevant only to areas with nearly bidirectional tidal currents.)
