Section outline

  • Collapse all Expand all

    Methods for Computing Watershed Yield

    Credits: 2 PDH

    PDH Course Description:

    This course outlines the methodologies used to compute water yield for a given site's watershed. Watershed yield can apply to either a long-term average (e.g., 1971–2000 average annual streamflow) or can be synonymous with runoff volume for a specific period (e.g., flow for May 1999). The period referred to is most often either a year or a month, but one could also consider a day or any other period in between.

    Topics:

    • The water balance equation
    • The use of runoff maps for computing water yield
    • The use of regression equations when computing water yield
    • The use of the water balance equation to compute water yield
    • Reservoir storage planning
    • Supply-demand relationship
    • Streamflow, precipitation, and evaporation data sources

    To take this course:

    1.) Enroll in Course: Click below to enroll:
    (must be logged into your user account)


    2.) Study: Once enrolled, click below to begin the course:

    Download the Study Guide

    3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.

    Take the final exam

    4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
         NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.

    Important Notice:

    Please ensure that a payment has been remitted, prior to completing Step 4 (printing your certificate of completion).
    Additionally, check your receipt to confirm that your plan is active and has not expired. 
    Certificates issued without a completed payment may be considered invalid by your board of licensure.


    Print the Certificate of Completion

    Intended Audience: This course is intended for water resource, civil, land development, environmental, and construction engineers. However, this course could appeal to engineers of other disciplines as well.
    Publication Source: USDA NRCS

    Donald Parnell, PE

  • Topic 1