University of Central Florida Civil and Environmental Engineering CWR4101 Hydrology Lecture 5A - Watershed Characteristics: Time of Concentration

The student should have the ability to;

• Define Time of Concentration and describe the methods of water transport of water.
• Describe the effect that changes in each of the following would have on time of cocnetration;
  • Watershed Area
  • Overland Slope
  • Channel Slope
  • Channel Area
  • Soil Type and Vegetative Cover
  • Basin Length
  • Stream Patterns and Watershed Length
  • Channel Roughness
• Determine the applicability and calculate time of concentration using each of the following methods;
  • Izzard's Formula
  • Kerby's Equation
  • Kirpich's Equation
  • Kinematic Wave Equation
  • Soil Conservation Service Equation
  • TR-55 Method
  • FAA Equation
  • Manning's Equation
  You will need to use the TC Calculator to view the equations for 2 of these equations. You are responsible for the material from TR-55 included in the link.
• Accurately estimate time of concentration from a set of given watershed parameters or watershed parameters which you collect.

• Wanielista, Kersten, and Eaglin - Chapter 5 section 5.1 and 5.2
• Viesmann and Lewis - Chapter 11.6 pages 182-185
• Singh
• Ponce
• Linsley, Kohler, and Paulhus

• In-Class Lecture 5A
• Class Notes

• Chapter 5 - Section 5.7.1 problems 18 and 19