Water emerging from a storm drain outlet requires reduction of excessive water flow that will prevent downstream channel erosion. Heavy rain events in Florida can often flow out of a discharge point, or outlet, at a very high rate of velocity. A failing storm-drain outfall can be determined in most cases because of unchecked erosion taking place during rainfall.
An energy Dissipator is used to perform several functions. First, a quality built and maintained outlet energy Dissipater will dramatically reduce the stormwaters momentum once it leaves the storm drain system. Secondly, it will also greatly assist in preventing damage to the channel downstream from the structure.
Energy Dissipators are best management practices designed to eliminate erosion by reducing the stormwater velocity flow to an acceptable level at a particular outlet discharge point. Choosing the right energy Dissipator for a specific location is crucial for efficient stormwater management and safety. The most used energy Dissipator is a riprap apron, and this method of stormwater velocity control is usually best suited for temporary use during construction. It consists of a layer of large, durable rocks or stones placed at the base of a structure, such as a spillway, culvert outlet, or weir, to dissipate the energy of flowing water and prevent erosion.
Careful attention should be placed on the design of outlet energy Dissipators to maximize effectiveness. The main goal is to deflect, scatter, or neutralize the high velocity of stormwater exiting the outlet. The goal is to give proper attention to the structural aspects that can dramatically reduce overall costs and ensure efficiency. An inadequately designed energy Dissipater may result in:
- High-velocity stormwater flows can cause excessive erosion.
- Scouring can occur, which is the removal of sediment or soil from around structures such culverts or spillways.
- Increased maintenance needs to address such excessive erosion and scouring.
- Eventually harm to aquatic habitats, disrupt water quality, and ecosystem health.
KCI can help you with site specific stormwater assessment principles that are essential to ensure the effectiveness of energy Dissipators. We can help you consider the right channel-protection designs to ensure energy dissipators can produce the right performance protection requirements for your specific need.
KCI is a leading environmental stormwater management firm specializing in sustainable stormwater management solutions for construction sites and industrial facilities. With a team of experienced environmental consultants, KCI provides innovative and effective solutions for erosion control, and water quality management. Contact us on 888-346-7779.
