Resilience
Resource Management Plan
response spectrum
Retaining wall
Return flow
Return-flow system (reuse system)
Revetment
Review of Operation and Maintenance (RO&M)
Rewind
RFD
Rhyolite
Richter scale
Riffle
Riffle and pool complex
right
| Right abutment
Right of way
Rigid pipe
Rill
Ring-follower gate
Ring gate
Ring seal gate
Riparian
Ripple
riprap
Risk
risk assessment
River corridor
River mile (RM)
River outlet works (row)
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