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D. MULTIFUNCTIONAL SYSTEMS Parking Lot <br /> Permeable Curb <br /> Multifunctional systems Incorporate multiple Stone Trench Level Spreader <br /> stormwater treatments crass Filter Strip <br /> Enhanced Swales & Ponds- Enhanced swales �,s~ a"w. --Optional Sand Layer <br /> contain inflltrcation/flmatlon systems which consist <br /> Bloretenflon Area <br /> of an Infiltration pond with a layer of filter media r Wet Prairie Plants <br /> (sand/crushed limestone)In their beds.They work " �� Gravel Curtain Drain Overflow <br /> best where soils are very coarse. W <br /> --- Berm <br /> Bioretentlon- Bioretentlon systems consist of Figure VI-6:Bioretentlon Swale with Level Spreader and Grass Filter Strip-Plan <br /> shallow landscaped areas that allow for ponding Source:Claytor <br /> and filtration of water runoff. Treatment involves <br /> settling,vegetative uptake,and filtering as water <br /> passes through layers of sand, loam and com- wrong Lot <br /> post before Infiltration or collection in underlying �-Permeable Curb <br /> perforated pipes. Traditionally designed convex <br /> grassed medians/parkways Stone Trench Level Spreader <br /> g and piping/catch ba- <br /> sins may be replaced with concave bioretentlon <br /> Grass Fitter Strip <br /> gardens and vegetated stormwater channels. Berm <br /> F `Wet Prairie Plants <br /> Ilu <br /> Optional Sand Layer <br /> Gravel Curtain Drain Overflow <br /> Figure VI-7:Bioretentlon Swale with Level Spreader and Grass Filter Strip-Section <br /> Source:Claytor <br /> 6"-17' Ponding <br /> 2"-3" Mulch <br /> 4'-0" Planting Soil <br /> r� <br /> r `!�Filter Fabric <br /> 1!( titl <br /> �_�-----Graved <br /> �• Drain <br /> Figure V1-8:Bioretentlon Swale-Section <br /> Source:Claytor <br /> edrt • - /- o • • • e - !- • Guidelines <br />