Table of contents

Introduction to Stormwater Management

• History and Context
• The Evolution of Stormwater Management
• The Impact of Urbanization
• Legislative Framework

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Integrating Stormwater Management into the Planning Process

• Introduction
• Environmental, Land Use and Stormwater Management Planning
• Overview of Landscape-based Stormwater Management Planning
• Landscape-based Stormwater Management Planning and Design Principles
• Integrated Design Process
• Opportunities Afforded by Landscape and Context
• Benefits of the Treatment Train Approach
• Importance of Runoff Source Area
• Landscape-Based Stormwater Management Opportunities

Low Impact Development Practices

• Principles of Low Impact Development
• Low Impact Development Site Design Strategies
• Adapting Structural Low Impact Development Practices for Southern Ontario Conditions
• The Low Impact Development Design Process
• Costs and Benefits of Low Impact Development Approaches

Design of Structural Low Impact Development Practices for Stormwater Management

• Rainwater Harvesting
• Green Roofs
• Roof Downspoout Disconnection
• Soakaways, Infiltration Trenches and Chambers
• Bioretention
• Vegetated Filter Strips
• Permeable Pavement
• Enhances Grass Swales
• Dry Swales
• Perforated Pipe Systems

Monitoring

• Fundamentals
• Compliance Monitoring
• Performance Monitoring
• Environmental Effects Monitoring

Appendices

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The changing of land cover and land uses from rural to urban; the growth of urban settlements.

The portion of water precipitated onto a catchment area, which then flows as surface discharge from the catchment area past a specified point.

Water from rain, snow melt, or irrigation that flows over the land surface.

Low impact development is a stormwater management and land development strategy applied at the parcel and subdivision scale that emphasizes conservation and use of on-site natural features integrated with engineered, small scale hydrologic controls to more closely mimic pre-development hydrologic functions.

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.

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

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.