Welcome, Introduction, Workshop Preview, Learning
Outcomes, and Assessment Method
1. An overview of recent developments in Drainage Planning
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- 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
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- 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
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- Bransby Williams equation
- Kirpich equation
- Airport formula
2.3 Methods of Computing Rainfall Losses
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- Runoff coefficients
- SCS curve number method
- Infiltration
2.4 Estimating Flows for Drainage Design
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- 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
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- 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
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- Manning’s equation
- Stable channels
- Composite channels
- Triangular channels and gutters
3.3 Introduction to Geomorphology-Is it a Science or Art?
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- Rosgen method
- Stability analyses
4. Design of Storm Sewers
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- Gravity flow sewers
- Hydraulic losses
- Simple spreadsheet design approach
5. Design of Culverts and Bridge Openings
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- Culverts, inlet and outlet control
- Use of design charts
- Bridge openings
6. Effect of Climate Change on Drainage
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- 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
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- Available software tools
- Software selection
- Review of StormCAD, FlowMaster, CulvertMaster