Stormwater Management - Design, Inspection and Operation/Maintenance of Stormwater Control Facilities

After participating in this course, you will be able to:

• Examine design applications for both new and existing stormwater management developments.
• Apply emerging techniques for controlling stormwater quantity, quality, and erosion.
• Adapt to evolving roles and responsibilities in stormwater management.
• Employ cost-effective methods for the operation and maintenance of stormwater facilities.
• Integrate design principles and inspection practices to ensure long-term efficiency and low maintenance costs of stormwater management systems.

Description
The success of the long-term, cost-effective operation of a stormwater management facility depends on 1) appropriate performance-based design; 2) an efficient inspection program undertaken during and after construction; and 3) the adoption of well-organized operation and maintenance practices. This workshop describes all the above aspects of stormwater management by assisting the designer in producing a cost-effective design with low maintenance cost and long-term trouble-free operation.

Similarly, the workshop will assist those involved in the operation and maintenance program in understanding the design principles and required performance of the facility and ensuring that stormwater facilities operate at their maximum efficiency over their useful life.

Who Should Attend
Municipal Engineers • Designers • Operation & Maintenance Staff • Developers • Planners • Consultants • Engineers • Other Technical Personnel Responsible For Drainage & Stormwater Management Facilities

Overview –The Big Picture - Why Do We Need Stormwater Management?

• Surface runoff discharge, volume and water quality,
• Groundwater quantity and quality,
• Natural habitat, stream corridors
• Changes in stream temperatures
• Current issues in controlling stormwater quantity and quality

Selection of Design Criteria

• Post and pre-development criteria
• Flood and floodplain
• Water quality
• Erosion control
• Major-minor system
• Water balance and recharge
• Effect of climate change

A Hydrology Refresher

• Rainfall analyses
• Time of concentration
• Rainfall losses
• Estimating flows using rational & hydrographs methods
• Estimating flows using recorded stream discharges

Hydraulics Design of Open Channel Flows

• Manning's Equation
• Stable Channels
• Composite Channels
• Triangular Channels & Gutters
• Closed conduits, Storm Sewers, Culverts

Workshop - Design of Stormwater Drainage System
Participants will work on a design exercise

Overview of Most Frequently Used Hydrology and Hydraulic Computer Models

• Hydrology – single event, continuous simulation
• Model complexity of urban and river models

Day II

Review of Alternative Stormwater Water Management BMPs

• Source control
• Conveyance controls
• End-of-pipe controls
• Good Housekeeping and municipal practices
• Wet pond, Wetland
• Rain gardens, Grassed swale, Infiltration Systems

Detention Pond Design

• Detention pond design basics
• Detention pond modelling concepts
• Components of stormwater facilities
• Routing data: storage and hydraulics relationships
• Inlet and outlet design

Inspection, Operation and Maintenance

• Inspection and Assessment of Storm Sewers, Culverts, and LID systems
• Municipal input during reviews of designs
• Erosion and sediment control and inspection during construction
• Operation and maintenance of pond facilities

Monitoring

• Objectives and preparation of a four-phase monitoring program
• Programs for monitoring flows, water quality, aquatic habitat,
• Parameters to be monitored, sampling, equipment
• Safety and public perception

Questions and Answers and Feedback to Participants on Achievement of Learning Outcomes