Method defines the river corridor as the area where a stream is susceptible to channel erosion.
This process-based, assessment scheme developed by Montgomery and Buffington utilizes basic energy and mass-balance equations to relate water and sediment flow to a number of geomorphic parameters.
Delineates an erosion hazard zone map in 3D
Defines the area subjected to flood events and/or meander migration
(From Raven, et al. 2002 - Germany) This German survey method, also created in response to the EU WFD, is entirely field-based.
Uses stream power and shear stress relationships and basic physical parameters to predict future channel locations under specific discharge scenarios.
(Information coming soon)
Reconstruction of historical paths is used to determine channel migration rates and predict future locations. These predictions are tempered by natural and human confinements. The Morphodynamic Corridor is likely to experience erosion in all cases while the Event Morphodynamic Corridor is at risk only during extreme floods.
Coming out of Australia, the River Styles Framework divides a river into Geomorphic Process Zones based on a particular zone’s sediment dynamics.
RiverRAT is a comprehensive resource and guide for river restoration project development and review of restoration project proposals.
The Rosgen Classification system developed by Dave Rosgen is easily the most widely applied river classification system used in the U.S. Its popularity is largely due to its codified nature, making it easy to learn for all levels of users within a limited amount of time (months) and money; and easy to apply uniformly (and repeat) across a range of natural systems.
Methodology for delineating a Lateral Erosion Envelope (LEE) around arroyos using empirically derived bank retreat equations based on bank material and incision depths.
This French survey method, created in response to the European Water Framework Directive Survey, is designed to quickly produce a broad overview of a river’s health, in comparison to a river with little to no human impact.
Simon created a process-focused assessment method in response to the Rosgen method, which Simon saw as ignoring channel evolution over time.
Noah Snyder of Boston College developed a simple, fast, automated method for using high-resolution remote-sensing data, including LiDAR, digital orthophoto quadrangles (DOQ), and aerial photography, to characterize basic yet important geomorphic parameters of rivers.
Delineates river corridor susceptible to channel migration based on elevation models
The Morphological Quality Index is the Italian response to the EU Water Framework Directive. It is also designed to assess habitat quality based on alterations of the morphology of a stream reach from a reference reach of the same type.
Field-based method designed for consistent application by non-experts, to assess physical structure of stream, primarily for ecological and riverine-habitat purposes.
Vermont has one of the most comprehensive river and watershed management protocols in the country. River assessment tools are available to the public on the state Agency for Natural Resources, and are based on the fact that streams and rivers are adjusting to channel, flood plain, or watershed changes imposed in years past by human activity. As part of the Vermont Geomorphic Assessment phase 1 protocol, river corridors are defined. First, corridor lines are drawn 2.5 times the bankfull width or 100 feet on each side of the channel. Next, the "meander centerline" is drawn, and a second corridor layer drawn 4 channel-widths to each side of that line. Any part of these corridors that is cut-off by a valley edge is extended on the other side of the river so that the corridor is at least 8 x the channel width (total). All corridor lines are then combined to create the widest corridor possible.