Tidal scour
![Elkhorn Slough is the focus of many tidal scour studies. Tidal scour became prevalent with the creation of the Moss Landing Harbor seen toward the bottom of the image.](/Images/godic/202502/16/Moss_Landing_California_aerial_view4519.jpg")
Tidal scour is “sea-floor erosion caused by strong tidal currents resulting in the removal of inshore sediments and formation of deep holes and channels”. Examples of this hydrological process can be found globally. Two locations in the United States where tidal scour is the predominant shaping force is the San Francisco Bay and the Elkhorn Slough. Tidal force can also contribute to bridge scour.