Structural BMPs Bioretention cells or rain gardens ● Green Roofs Bioboxes or bio-filters Sidewalk Storage Planter Boxes Vegetated Swales,Buffers,and Strips;Tree Preservation 。 Roof Leader or Downspout Disconnection Rain Barrels and Cisterns Permeable Pavers 。 Soil Amendments 。 Impervious Surface Reduction and Disconnection ● Pollution Prevention and Good Housekeeping Commonly Used LID/GI Practices
Structural BMPs • Bioretention cells or rain gardens • Green Roofs • Bioboxes or bio-filters • Sidewalk Storage • Planter Boxes • Vegetated Swales, Buffers, and Strips; Tree Preservation • Roof Leader or Downspout Disconnection • Rain Barrels and Cisterns • Permeable Pavers • Soil Amendments • Impervious Surface Reduction and Disconnection • Pollution Prevention and Good Housekeeping . Commonly Used LID/GI Practices
LID ----Low Impact Development ● The most influential early use of the term was in Prince George's County,Maryland,USA in the early 1990s(e.g.Prince George's County Department of Environmental Resources,1993).The term LID was used to distinguish the site-design and catchment- wide approach from the common stormwater management approach at that time,which typically involved conveyance to large end-of-pipe detention systems. Low-impact development(LID)is a term used in Canada and the United States to describe a land planning,and engineering design approach to manage stormwater runoff as part of green infrastructure.LID emphasizes conservation and use of on-site natural features to protect water quality.This approach implements engineered small-scale hydrologic controls to replicate the pre-development hydrologic regime of watersheds through infiltrating,filtering,storing,evaporating,and detaining runoff close to its source
LID ----Low Impact Development • The most influential early use of the term was in Prince George’s County, Maryland, USA in the early 1990s (e.g. Prince George’s County Department of Environmental Resources, 1993). The term LID was used to distinguish the site-design and catchmentwide approach from the common stormwater management approach at that time, which typically involved conveyance to large end-of-pipe detention systems. • Low-impact development (LID) is a term used in Canada and the United States to describe a land planning, and engineering design approach to manage stormwater runoff as part of green infrastructure. LID emphasizes conservation and use of on-site natural features to protect water quality. This approach implements engineered small-scale hydrologic controls to replicate the pre-development hydrologic regime of watersheds through infiltrating, filtering, storing, evaporating, and detaining runoff close to its source
Comparing LID and Conventional Development Conventional Development LID Subdivision 0e Graphics:Low Impact Development Cente Dark Blue =Stormwater Ponds Light Blue bioretention areas
Conventional Development LID Subdivision Comparing LID and Conventional Development Dark Blue = Stormwater Ponds Light Blue = bioretention areas Graphics: Low Impact Development Center
What is Green Infrastructure? "An interconnected network of green space and environmental assets that conserve the functions of natural ecosystems and provide associated benefits to people." -Mark Benedict and Ed McMahon of The Conservation Fund
Green Infrastructure (Gl):Define and Beneficial Functions Gl is an approach to wet weather management that maintains or restores natural hydrology.The same principles are the main objectives of the LID approach. GI is principally structured by a hybrid hydrological and drainage network,complimenting and linking green areas with built infrastructure that provides ecological functions GI promotes the use of LID practices.Therefore sometimes the two terms are used interchangeably
Green Infrastructure (GI): Define and Beneficial Functions • GI is an approach to wet weather management that maintains or restores natural hydrology. The same principles are the main objectives of the LID approach. • GI is principally structured by a hybrid hydrological and drainage network, complimenting and linking green areas with built infrastructure that provides ecological functions. • GI promotes the use of LID practices. Therefore sometimes the two terms are used interchangeably