Flood control, at its most basic level, consists of either providing the ability to remove excess water from flood-prone areas during storm events or providing adequate storage space for excess water during periods of heavy rain. The first approach uses large pumping stations to evacuate extra water.
The second approach uses canals, dykes, levees, large water mains and other approaches to keep water contained until it can be naturally released. As waters rise in these structures, many discharge lines that are normally well above the water levee can suddenly find themselves deeply submerged. For this reason, it is important to protect all discharge line in a flood control basin with reliable backflow prevention.
Due to their exposed location and long periods of activity, a check valve must not be prone to rust, corrosion or clogging. Metal flapgates suffer all of these maladies and are easily propped open, rendering them inoperative in times of need. Stormwater can also contain large debris that would render a flapper valve useless.
Tideflex® Check Valves meet flood control needs perfectly because of their low headloss, 100% rubber construction and patented design. Available in sizes up to 96", Tideflex® Check Valves are the best available technology for backflow prevention in flood control systems.
Stormwater Containment Structures - Mixing and Treatment Systems
Regulations for stormwater containment, testing and treatment are currently being implemented. Storage is required to capture the initial run-off and test for treatment requirements. This stormwater can contain accumulated pollutants and debris, requiring mixing systems in these storage tanks to re-suspend the accumulated solids, as well as provide residual dissolved oxygen to keep the fluid from going anaerobic.
The Tideflex® Coarse Bubble Mixing System with EPDM nozzles is very durable and can be fully exposed to weather conditions (open lagoon structures) or contained within a buried storage vault. The nozzles are non-clogging devices, making the system maintenance-free, with no need for regimented service. They are ideal for these applications that are typically located away from the primary wastewater treatment facility and its operational staff.
The Tideflex® Systems can be operated in an ON/OFF mode for periodic mixing as required to significantly reduce energy usage. The check valve diffusers prevent waste and debris from entering the manifold piping and provide a maintenancefree system. The Tideflex® design models produce the most efficient configuration of piping and diffusers for optimizing controlled loop mixing and fluid momentum. Controlled loop mixing provides better mixing of heavy solids as compared to full floor coverage configurations.