Lake Erie North Shore Watershed Plan - Niagara Peninsula ...

LAKE ERIE NORTH SHORE WATERSHED PLAN
Stormwater Best Management Practices
Stormwater BMPs are techniques, measures, or structural controls that are used to
manage the quantity and improve the quality of stormwater runoff in a cost effective
manner. Measures for controlling storm water include at source and lot-level controls,
conveyance controls and end-of-pipe controls. Examples of Stormwater BMP‟s can be
reviewed in Appendix B.
At Source and Lot-Level Quantity Controls:
Typically At Source and Lot-Level controls are the most effective in providing water
quality protection because they prevent pollutants from entering the drainage system
and provide for flow retention at source. Most practices can assist in addressing the four
criteria; quantity, quality, stream erosion, and hydrologic cycle, but they are more often
associated with quality and quantity control (National Guide to Sustainable Municipal
Infrastructure 2003; AECOM 2010). At Source and Lot-Level controls consist of nonstructural
source controls, housekeeping practices, control of construction activities, and
structural at-source controls (AECOM 2010).
Conveyance Controls
Conveyance controls provide quality and/or quality control within the conveyance system
between the source and outlet, to help mitigate the impacts of urbanization. They
transport runoff from developed areas through storm sewers, roadside ditches, or
vegetated swales (AECOM 2010).
End-of-Pipe Controls
End-of-pipe controls allow for flow attenuation, major flow conveyance, and water quality
enhancement of storm water before outletting to receiving body of water. Examples
include wetlands, dry ponds and wet ponds. End-of-pipe controls allow for storm water
quality and quantity mitigation at or near the downstream end of the conveyance control
(AECOM 2010).
Managerial Best Management Practices
Managerial BMPs can also be achieved through municipalities. Municipalities can
encourage and/or regulate land use planning and management by developing
ordinances to manage stormwater impacts by limiting pavement, preserving open space,
and delineating areas in the watershed for more on-site stormwater management
facilities. Examples of Managerial BMP‟s can be reviewed in Appendix B.
Agricultural Best Management Practices
BMPs can improve rural non-point source pollution problems. For example, a lack of
tributary buffers, and nutrient management have been identified in the watershed (RMN
2006). Sediment control BMPs, water quality BMPs and nutrient management BMPs can
be employed to mitigate the impacts of these activities on watercourses and wetlands.
Examples of agricultural BMPs are provided below and a more thorough list of
agricultural BMPs can be found in Appendix B.
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