Skip to main content

H&H Technical Information

H&H Technical References & Resources 

NRCS policy and procedures regarding hydrology and hydraulics can be found in the National Engineering Manual and National Engineering Handbook under Title 210-Engineering, in the specific references below, available from eDirectives:

  • National Engineering Manual Title 210 Part 530 Hydrology
  • National Engineering Handbook Part 630 Hydrology
  • National Engineering Handbook Part 653 Stream Corridor Restoration Principles, Processes, and Practices
  • National Engineering Handbook Part 654 Stream Restoration Design
Technical Note – Hydrologic Analyses of Post-Wildfire Conditions (9.98 MB)
Stream Restoration Planning & Design Field Guide (28.48 MB)
Earth Dams and Reservoirs (TR-60, 3rd Ed.) (2019) (1.69 MB)
Dam Breach Hydrograph Routing (TR-66) (1985) (1.93 MB)

Roughness Characteristics of Natural Channels, USGS Water Supply Paper 1849

Guide for Selecting Manning’s Roughness Coefficients for Natural Channels and Flood Plains, USGS Water Supply Paper 2339