Channel Evolution and Prediction of Future Channel Dimensions

Principal Investigator: Dr. Andrew Simon

Problem:

In incised channels, meander development represents a mechanism by which streams decrease sediment-transport capacity by reducing channel gradient and stream power. The timing and magnitude of meander development and/or extension during the course of channel evolution is unknown, although meandering streams generally provide better habitats.

Objective:

This research is aimed at determining the role of meander development in incised channel evolution. The role is investigated in terms of the temporal and spatial relations of such development relative to specific characteristics of the disturbed channel.

Description of Work:

Incised meander development in initially straight (channelized) reaches and in sinuous reaches are being studied at numerous sites with different boundary conditions in the DEC watersheds of Mississippi, West Tennessee, and eastern Nebraska.

Benefit:

Results will aid in our understanding of the timing of planform changes during incised channel evolution, and in our predictive ability in determining stable channel geometries, amounts of lateral migration, and stable planforms.