Model:River Erosion Model


River Erosion Model


Also known as REM
Model type Single
Model part of larger framework
Note on status model
Date note status model
Incorporated models or components:
Spatial dimensions 1D
Spatial extent Watershed-Scale
Model domain Terrestrial, Hydrology
One-line model description An intermediate complexity model for simulating stream channel evolution (years to decades) at the watershed scale.
Extended model description REM mechanistically simulates channel bed aggradation/degradation and channel widening in river networks. It has successfully been applied to alluvial river systems to simulate channel change over annual and decadal time scales. REM is also capable of running Monte Carlo simulations (in parallel to reduce computational time) to quantify uncertainty in model predictions.


Name Roderick Lammers
Type of contact Model developer
Institute / Organization University of Georgia
Postal address 1
Postal address 2
Town / City Athens
Postal code 30606
State Georgia
Country United States
Email address

Supported platforms
Other platform Has not been tested on non-Windows platforms
Programming language


Other program language
Code optimized Single Processor, Multiple Processors
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2017
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status Only maintenance
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension)
Through web repository
Source web address
Source csdms web address
Program license type Other
Program license type other MIT
Memory requirements
Typical run time 5-10 minutes for single run; hours for Monte Carlo runs

Describe input parameters Channel geometry (e.g. bank height/angle, width, longitudinal profile); bed grain size distribution; discharge time series; sediment input time series; bank soil parameters (critical shear stress and cohesion)
Input format ASCII
Other input format
Describe output parameters Channel geometry; sediment export
Output format ASCII
Other output format
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? Yes
If above answer is yes
Other visualization software R package REMvisualizer

Describe processes represented by the model Sediment transport, channel bed aggradation/degradation, fluvial bank erosion (excess shear stress) and bank failure (mass wasting). See Lammers and Bledsoe (2018) and Lammers and Bledsoe (2019) for more information:

Describe key physical parameters and equations
Describe length scale and resolution constraints
Describe time scale and resolution constraints
Describe any numerical limitations and issues

Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets Modeling testing performed on data from the lower Colorado River and North Fork Toutle River. Model input data available here:
Upload test data sets if available:
Describe ideal data for testing Long term (at least 10 years) of data on stream channel evolution. This would include changes in both channel width and bed elevation throughout a small channel network. Also have a continuous time series of discharge and physical characteristics of the stream channels (bed grain size distribution, bank soil erodibility, etc.).

Do you have current or future plans for collaborating with other researchers?
Is there a manual available? Yes
Upload manual if available:
Model website if any
Model forum / discussion board

This part will be filled out by CSDMS staff

OpenMI compliant
BMI compliant
WMT component
PyMT component
Is this a data component
Can be coupled with:
Model info
Nr. of publications: 2
Total citations: 16
h-index: 2
m-quotient: 0.33

Link to this page




Nr. of publications: 2
Total citations: 16
h-index: 2
m-quotient: 0.33

Featured publication(s)YearModel describedType of ReferenceCitations
Lammers, Roderick W.; Bledsoe, Brian P.; 2018. A network scale, intermediate complexity model for simulating channel evolution over years to decades. Journal of Hydrology, 566, 886–900. 10.1016/j.jhydrol.2018.09.036
(View/edit entry)
2018 River Erosion Model
Model overview 9
Lammers, Roderick W.; Bledsoe, Brian P.; 2019. Quantifying pollutant loading from channel sources: Watershed-scale application of the River Erosion Model. Journal of Environmental Management, 234, 104–114. 10.1016/j.jenvman.2018.12.074
(View/edit entry)
2019 River Erosion Model
Model application 7
See more publications of River Erosion Model



Input Files

Output Files