# Lab-0013

## Meandering River Dynamics

Duration
2.0 hrs
Updated
2022-04-19
Run online using: Contributor(s)
Zoltan Sylvester at Bureau of Economic Geology, University of Texas at Austin.
Irina Overeem at University of Colorado.

Introduction

Meanderpy is a Python package that implements a simple numerical model of meandering, the one described by Howard & Knutson in their 1984 paper "Sufficient Conditions for River Meandering: A Simulation Approach". This is a kinematic model that is based on computing migration rate as the weighted sum of upstream curvatures; flow velocity does not enter the equation. Curvature is transformed into a 'nominal migration rate' through multiplication with a migration rate (or erodibility) constant; in the Howard and Knutson, 1984 paper this is a nonlinear relationship based on field observations that suggested a complex link between curvature and migration rate.

In the 'meanderpy' package we use this linear relationship between the nominal migration rate and curvature, as recent work using time-lapse satellite imagery suggests that high curvatures result in high migration rates (Sylvester et al., 2019).

There is a keynote lecture on the concepts behind this model that you can watch here: https://csdms.colorado.edu/wiki/Presenters-0433

Classroom organization
This is a self-contained jupyter notebook using meander py. It is recommended the instructor introduces concepts of meandering rivers, and students read papers on meadner migration rate - i.e. the papers directly associated with the model. Students can run through the examples, and then assignments can be worked on plenary in a lab style class or as homework. It is recommended that results are being discussed plenary after the completion of the exercises.

Learning objectives
Skills
• learn how to save a plot in python, and make a movie from a model simulation
• implement basic calculations of river hydraulics and morphological relationships on command line
Key concepts
• learn about the planview morphology of meandering rivers
• learn how to quantify sinuosity, relationship between slope,
• learn how meandering rivers migrate

Lab notes

Notes are in the associated Jupyter Notebook.

This lab can be run on the lab (for educators) and jupyter (for general use) instances of the OpenEarthscape JupyterHub: just click one of the links under the Run online using heading at the top of this page, then run the notebook in the "CSDMS" kernel.