In tidal and/or wind and wave conditions, what is the required gap between the bottom of the curtain and the floor of the water body at mean low water?

The requirement for a one-foot gap between the bottom of the curtain and the floor of the water body at mean low water is crucial in the context of controlling sedimentation and managing stormwater runoff, especially in tidal or dynamic conditions. This gap helps to accommodate natural fluctuations in water levels and ensures that the curtain functions effectively without becoming buried in sediment or debris.

Having a one-foot gap allows for adequate water circulation, which is essential for maintaining water quality and supporting aquatic life. It also helps prevent the curtain from becoming dislodged due to shifting sediment or wave action, ensuring that it remains in its intended position for effective sediment control.

If the gap were larger or smaller, it might compromise the effectiveness of the barrier in controlling sediment flow and could lead to increased sedimentation in areas where it is not desired, ultimately impacting water quality and local ecosystems.