NB_450_21_6 - NB 450-21-6 TCH – Release of a New Version of the Revised Universal Soil Loss Equation (RUSLE2)
NB 450-21-6 TCH – Release of a New Version of the Revised Universal Soil Loss Equation (RUSLE2)
National Bulletin: 450-21-6 Date: September 22, 2021
Subject: TCH – Release of a New Version of the Revised Universal Soil Loss Equation (RUSLE2) Model for Water Erosion


 

Purpose.  To notify States of the release of RUSLE2, version 2.7.0.5 that replaces RUSLE2, version 2.6.11.1. 

 

Expiration Date.  December 30, 2022

 

Background.  NRCS maintains RUSLE2 as its official water erosion prediction model. A new version of RUSLE2 provides some critical updates in soil import function and fixes to the rotation builder. Erosion value estimates are not affected by this update as no changes were made to the science code for this version.

 

Explanation.  On October 1, 2021, a new version (2.7.0.5) of the RUSLE2 erosion prediction model will begin to be loaded on user machines on the USDA-NRCS network to replace the existing RUSLE2, version 2.6.11.1. The 2.7.0.5 version will also be available for download on the software center. A summary of the updates available in version 2.7.0.5 are:

  • RUSLE2 has been updated to fix a soil import issue for some Pacific Basin soil surveys.
  • Minor fixes in the database.
  • A rotation builder bug was fixed.
  • Updated user templates and reduced them to a list of distinguishable minima, but the State-specific ones did not change.
  • Updated the print templates to display climate information and reduced them to a list of distinguishable minima, but the State-specific ones did not change.
  • A new Climate-Smart Window has been added to most user templates, but it is not active for field office users. State agronomists will have access to this window to explore climate change impacts on erosion in their States/territories.

Distribution.  This directive is available on the NRCS eDirectives Electronic Directives System website at http://policy.nrcs.usda.gov.

Filing Instructions.  Due to printing and distribution costs, the availability of this information is limited to electronic format (with limited paper distribution). If a paper copy is retained, file it sequentially within General Manual Title 450, Technology.

 

Contact.  For further information, contact Dr. Betsy Dierberger, National Agronomist, Ecological Sciences Division, by telephone at (202) 720-3783 or by email at betsy.dierberger@usda.gov.

 
 


 /s/

J. Xavier Montoya
Acting Deputy Chief for Science and Technology
   
      

 
 
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