River Habitat Survey manuals and spot-check key.
RHS Manual 2003 Version 1 (2018) with photo gallery
RHS form 2003 Version 1 (2018) and spot-check key
Spot-check key update (2021)
Old versions of the RHS form (previous formats)
Explanation of differences between survey formats including cRHS 1994-2022: RHS forms over the years
RHS 1997 manual translated in French
RHS 1997 manual translated in German