RHS technical update 2009

1 River Habitat Survey Technical Update August 2009 IMPORTANT KEY NOTES FOR RECORDING RHS DATA PLEASE KEEP THIS UPDATE WITH YOUR FIELD SURVEY GUIDANCE MANUAL   Bank and Channel Resectioning    Correct identification of resectioned banks and channel is... More

1 River Habitat Survey Technical Update August 2009 IMPORTANT KEY NOTES FOR RECORDING RHS DATA PLEASE KEEP THIS UPDATE WITH YOUR FIELD SURVEY GUIDANCE MANUAL   Bank and Channel Resectioning    Correct identification of resectioned banks and channel is important in allowing us to  accurately judge how natural or how modified a reach is.   However, resectioning is  difficult to establish in many cases, so this technical update offers further guidance  on when surveyors should record resectioning, and what clues to look for.     Indicators    The RHS manual gives six indicators of resectioning, but does not make explicit which  are describing bank resectioning and which are describing channel resectioning.    Although bank and channel resectioning often occur in tandem, each should be  considered separately using the available evidence.     Bank Resectioning    • Uniform angled bank profile – this is the key indicator for bank resectioning     The following indicators give clues as to whe Less