What is a major limitation of using barriers for sediment control at an inlet?

Using barriers for sediment control at an inlet is essential for reducing sediment transport and filtering out pollutants. However, a significant limitation of these barriers is their potential to cause flooding and sedimentation downstream. When barriers are employed, they can impede the natural flow of water, leading to an accumulation of water on one side of the barrier. During intense rainfall or larger runoff events, this can create a backup of water, which may result in flooding upstream.

Moreover, the excess water can lead to increased velocity and volume upon exiting the barrier, which can then dislodge sediment that has accumulated in front of the barrier, resulting in sedimentation issues downstream. This creates a dual problem where the intended sediment control could inadvertently lead to increased sediment loads affecting water quality and habitats downstream.

While barriers may be easy to install and can perform well in certain conditions, these attributes do not mitigate their potential adverse effects during heavy rainfall or runoff events, which emphasizes the need for careful planning and consideration in their use.