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Hydrology Training Series Module 204 Runoff Curve Numbers (NRCS-NEDC-000097)

Overview

This module presents the history and development process of the runoff curve numbers and will allow the participants to develop a curve number for a unique soil-cover complex.

Objectives

Upon completion of this module, participants will be able to:

  • Explain the development of the runoff curve number procedure
  • Develop a CN for a unique or a specific soil cover complex

Prerequisites

Module 103 – Runoff Concepts and Module
Module 104 Runoff Curve Numbers

References

Hydrology, Section 4, National Engineering Handbook.

Robert E. Rallison “Orgin and Evolution of the NRCS Runoff Equation”, Proceeding of the Symposium on Watershed Management 80 ASCE Boise, ID, July 1980.

Donald E. Woodward “Runoff Curve Number for Semiarid Range and Forest Conditions” 1973 Annual Meeting ASAE Paper No. 73-209

Duration

Participant should take as long as necessary to complete the module. Training time for this module is approximately three hours.

Target Audience

All Hydraulic engineers, area level engineers, technicians, and others who need to have an understanding of the physical aspects pertaining to the prediction of runoff from precipitation

Method of Completion

This module is self-study, but the requesting office should select a resource person to answer any questions that the participant’s supervisor is unable to answer.

NEDC Contact

Tony Lovell

Technical Coordinator

Quan Quan

Enrollment

Enrollment instructions are provided below.  Be sure to select the appropriate link to ensure successful enrollment. 

USDA Employees

  • Proceed to the Aglearn to login using your USDA eAuthentication ID and password.  This is the same as your WebTCAS ID and password.
  • Select Catalog, Select Natural Resources Conservation Service under Subject Area Menu.
  • Choose the course name by select the button Launch content or Add to Learning Plan to register and complete the course.

District Employees with AgLearn Account

  • Proceed to the Aglearn to login using your USDA eAuthentication ID and password. This is the same logon ID and password used for the TechReg TSP application or profile.
  • Select Catalog, Select Natural Resources Conservation Service under Subject Area Menu.
  • Choose the course name by select the button Launch content or Add to Learning Plan to register and complete the course.
  • If you do not have an account.  Specific instructions on securing a USDA user account and password are located at getting started.  For further assistance contact the USDA state office in your state for assistance in obtaining an eAuthentication ID and password and AgLearn account.

Technical Service Providers

  • Proceed to the Aglearn to login using your USDA eAuthentication ID and password. This is the same logon ID and password used for the TechReg TSP application or profile.
  • Select Catalog, Select Natural Resources Conservation Service under Subject Area Menu.
  • Choose the course name by select the button Launch content or Add to Learning Plan to register and complete the course.
  • If you are anticipating becoming a Technical Service Provider please review the entire process at TechReg.  Please familiarize yourself with this process if you have not already done so.  Specific instructions on securing a USDA user account and password are located at getting started.

Other USDA Customers

  • For those not in the above categories contact the USDA state office in your state for assistance in obtaining an eAuthentication ID and password and AgLearn account.
  • To obtain this contact information for your state you can go to the Aglearn website click on contact us. Scroll down to NRCS and click on the link that says state contacts.

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