The course will also address the use of computer software for design work. 

• • consider technical issues in design by focusing on related planning and environmental impact
  • enhance protection of property from flood damage and reduce pollution at a lower cost
  • select computer software that is most suitable for your application of urban drainage design
  • participate in public consultation meetings with confidence
  • employ design methodology learned in the course on your next project for urban drainage

After participating in this course you will be able to do the following:

• • To increase participants’ knowledge of the design process and design tools used in urban drainage
  • To discuss the future of computer-aided design in urban drainageMunicipal engineers; developers; planners; consultants; hydraulic engineers; technicians and technologists; and other technical personnel responsible for drainage facilities, underground pipe systems, inlets, culverts, and catch basins. This course is particularly suitable for those who want a comprehensive review of drainage design methods.

Welcome, Introduction, Workshop Preview, Learning
Outcomes, and Assessment Method

1.    An overview of recent developments in Drainage Planning

• • Watershed/subwatershed plans
  • Complex Environmental Impact study requirements of the Natural Heritage System
  • Long-term operation and maintenance
  • Monitoring, why, what, when, and who

2.    Basic Hydrology: Refresher

2.1 Rainfall Analyses

• • Design storms or floods-how to cope with lack of long and reliable data sets
  • Storm frequencies-the danger of extrapolation
  • Intensity-Duration-Frequency (IDF) data
  • Historical storms

2.2 Time of Concentration: Review of Design Equations, Charts and Their Limitations

• • Bransby Williams equation
  • Kirpich equation
  • Airport formula

2.3 Methods of Computing Rainfall Losses

• • Runoff coefficients
  • SCS curve number method
  • Infiltration

2.4 Estimating Flows for Drainage Design

• • Peak flow methods: statistical analyses
  • Rational method-is it still rational?
  • Hydrograph and unit hydrographs
  • Examples of Estimating Flows

3.    Open Channel Flow: Refresher

3.1 Basic Hydraulic Theory

• • Basic laws of hydraulics
  • Types of flows
  • Manning’s equation
  • Roughness coefficients
  • Backwater effects
  • Stream erosion and threshold velocities
  • Effect of urbanization on stream hydraulics

3.2 Design of Open Channels

• • Manning’s equation
  • Stable channels
  • Composite channels
  • Triangular channels and gutters

3.3 Introduction to Geomorphology-Is it a Science or Art?

• • Rosgen method
  • Stability analyses

4.    Design of Storm Sewers

• • Gravity flow sewers
  • Hydraulic losses
  • Simple spreadsheet design approach

5.    Design of Culverts and Bridge Openings

• • Culverts, inlet and outlet control
  • Use of design charts
  • Bridge openings

6.    Effect of Climate Change on Drainage

• • The effect of climate change-how to make allowance for it when we know so little?
  • Predictions of changes in precipitation
  • What a prudent designer should do

7.    Drainage Design Software: A Review

• • Available software tools
  • Software selection
  • Review of StormCAD, FlowMaster, CulvertMaster

CDGA attendance certificate will be issued to all attendees completing minimum of 80% of the total course duration.