the total volume of water passing in and out of a particular area, such as a lagoon or salt marsh, during a tidal cycle.
Volume of water moving into and out of an estuary or coastal waterway during the tidal cycle.
The volume of water that flows in and out of an area between higher high tide and lower low tide.
Volume of water that is drawn into a bay or estuary from the ocean during flood tide (i.e., a rising tide).
The volume of water exchanged between a lagoon or estuary and the open sea in the course of a complete tidal cycle.