Design of Urban Water Management Structures

Detention storage structures and storm sewer systems are used to store and transport rainfall-runoff through open ditched and underground pipes.

In this course, we will:

• Learn about spatial distribution of rainfall, perform statistical analysis, fit different distributions to the data, and calculate design rainfall.
• Learn to estimate runoff using the rational method and time of concentration, and use the SCS-CN method to determine the time distribution of runoff. Unit hydrograph theory and computation of storm hydrographs will be covered.
• Use regulations to design storm sewer systems using EPA-SWMM.
• Compute storage volumes for detention storage structures.

• Week 1: Rainfall temporal and spatial variation, design rainfall and hydrologic risk
• Week 2: Runoff using Rational Method, storm sewer design
• Week 3: Detention storage design, SCS CN method
• Week 4: Hydrographs, SCS triangular and curvilinear unit hydrographs
• Week 5: Superposition, computing runoff hydrographs from unit hydrograph theory