LID BMP Fact Sheets

Fact Sheet example for Enhanced Grass Swales

Overview

Please find below a collection of the most common LID Best Management Practices for both Development, Planning and Design. These fact sheets provide helpful details on:

• Design Considerations
  • Geometry and Site Layout
  • Pre-Treatment (if applicable)
  • Conveyance and Overflow
  • Proper Landscaping Techniques
  • Access Structures, etc.

• Construction
  • Soil Disturbance and Compaction
  • Erosion Sediment Control (ESC)
  • Excavation
  • Base Construction (if applicable), etc.

• Planning Considerations
  • Soil
  • Wellhead Protection (if applicable)
  • Karst (if applicable)
  • Site Topography
  • Setback Distances
  • Proximity to Underground Utilities, etc.

The fact sheets also include helpful details on overall, general specifications associated with key materials of the given LID installation, associated pictures, plan and profile views of LID cross section schematics, etc. These fact sheets are to be used to help practitioners understand the benefits and key details associated with the implementation of these various LID practices and offers a great introductory look into appropriate LID practices for their given needs. Further technical details can be found on the corresponding LID practices wikipages hyperlinked below the clickable buttons housing the fact sheets below.

Exfiltration Systems

Read more about *Exfiltration trenches

Infiltration Trenches/Chambers & Soakaways

Read more about *Infiltration chambers & *Infiltration trenches

Bioretention

Read more about *Bioretention

Green Roof

Read more about *Green roofs

Permeable Pavements

Read more about *Permeable pavements

Rainwater Harvesting

Read more about *Rainwater harvesting

Enhanced Swales

Read more about *Enhanced swales & *Swales

Better Site Design

Read more about *Better site design

Stormwater Tree Trenches

File:Tree trenches final Update.pdf

Read more about *Stormwater planters & *Trees

A shallow constructed channel, often grass-lined, which is used as an alternative to curb and channel, or as a pretreatment to other measures. Swales are generally characterized by a broad top width to depth ratio and gentle grades.

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

State of the art methods or techniques used to manage the quantity and improve the quality of wet weather flow. BMPs include Source, Conveyance and End-Of-Pipe Controls.

Soil, sand and minerals washed from land into water, usually after rain. They pile up in reservoirs, rivers and harbors, destroying fish-nesting areas and holes of water animals and cloud the water so that needed sunlight might not reach aquatic plans. Careless farming, mining and building activities will expose sediment materials, allowing them to be washed off the land after rainfalls.

The downward movement of water through the soil, the downward flow of runoff from the bottom of an infiltration BMP into the soil.

Loss of water from a drainage system as a result of percolation or absorption into the surrounding medium (e.g., the infiltration of water into the native soil through a perforated pipe wall as it is conveyed).

A shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation.