- Horizontal flow biofiltration
- Volume reduction & control
- Pretreatment chamber
- Reduced clogging
- 50% smaller footprint
- No depressed planter area
- Low maintenance costs
Approvals & Performance
The Washington State Department of Ecology (Ecology) finds the Bio Clean WetlandMod system is functionally equivalent to a bioretention facility when used for treating stormwater. The media specifications for the WetlandMod system must adhere to the design guidelines for bioretention areas.
The WetlandMod must use an Ecology approved bioretention soil mix.
Downward Flow Bioretention vs. The WetlandMod
Bioretention systems have an inherent flaw — the force of gravity. As stormwater runoff carries pollutants into the system, including sediments and hydrocarbons, they are deposited on top of the bioretention media where it accumulates and quickly clogs the filter media. It has been documented that sediment accumulation from just a few storm events can completely clog a bioretention system. This leads to drastically reduced infiltration rates, expensive maintenance burdens, and safety issues associated with standing water, depressed landscaping, and vector control.
Downward Flow Flaws
Horizontal Flow Advantages
- Downward flow systems filter water in a single vertical direction, forcing material to build up on the top.
- As sediment rapidly builds up on the media bed, flow is impeded and the bioretention system quickly clogs or fails.
- Sediment, trash and debris entering the WetlandMod accumulate adjacent to vertical media surface reducing clogging.
- The vertical ponding area (void area) maximizes sedimentation and minimizes clogging issues associated with downward flow bioretention.
The WetlandMod is designed to utilize any type of bioretention mix regardless of your regional standards and regulations. From Washington state to Florida, the WetlandMod can address your local requirements and specifications, including a 5-Inch Per Hour sand compost mix found in most Low Impact Development (LID) manuals.