UG_210_9_26 - UG_210_9_26, EFH2 Computer Program, Estimating Runoff and Peak Discharge, Version 1.1.0, and User's Manual
UG_210_9_26, EFH2 Computer Program, Estimating Runoff and Peak Discharge, Version 1.1.0, and User's Manual
User Guide: 210-9-26    Date: July 28, 2009  
Subject: ENG - EFH2 Computer Program, Estimating Runoff and Peak Discharge, Version 1.1.0, and
         User's Manual 


   
 
Purpose.  To transmit the EFH2 Computer Program, Estimating Runoff and Peak Discharge, Version 1.1.0, dated March 2003, and User’s Manual, dated August 2009.  
 
Expiration Date.   Effective upon receipt.   
 
Background.   The Natural Resources Conservation Service (NRCS) uses the National Engineering Handbook Part 650, Engineering Field Handbook (EFH) Chapter 2, Estimating Runoff and Peak Discharge (NEH 650.02) to determine runoff volumes and peak discharges for small single subarea watersheds in the design of on-farm conservation practices.  The EFH2 Computer Program, Version 1.1.0 computer program, dated March 2003, is a Windows® operating system-based version of the old EFM2 DOS computer program which automated the computations found in NEH 650.02.

 

EFH2, Version 1.1.0, has been in use throughout NRCS since 2003.  However, a User’s Manual for the computer program was never developed or released.  This User Guide notice issues the EFH2, Version 1.1.0, computer program into the permanent directives system and transmits the accompanying User’s Manual.

       
 
Explanation.   NRCS users are to obtain the EFH2, Version 1.1.0, computer program through their Information Technology Support (ITS) managers.

 

Users with questions or comments regarding the software or the User’s Guide should direct those to the appropriate State-level staff engineer or to the Hydraulic Engineers, West National Technology Support Center, at (301) 504-3948 or (301) 504-3952.

Distribution.  Due to printing and distribution costs, this directive and the user guide are only available electronically through the NRCS Electronic Directives System Web site at http://directives.sc.egov.usda.gov/.





Filing Instructions.  The attached User’s Manual may be printed out and retained.  In the event that a paper copy of the documentation is retained, it should be placed in a three-ring binder and adjacent to other technical directives.

    
 
Contact.   Contact the National Hydraulic Engineer, Conservation Engineering Division (CED) at (202) 720-0772 or by writing to CED, P.O. Box 2890, Washington, D.C.  20013 with any questions regarding this directive.    
 
 

           /s/

NOLLER HERBERT, P.E.
Director

    

 
 
Attachment     
[UG_210_9_26 - July 2009]