3 Watershed Processes and the Fluvial Forms and Dynamics They Produce

Sunday, 17 March 2024
8:00 AM - 12:00 PM
Merrimack Room

QUANTIFYING CHANGES IN STREAM MORPHOLOGY AND VEGETATION AROUND BEAVER DAM ANALOGUES, RED CANYON CREEK, WYOMING

Paper number: 3-10
Program: Theme Sessions
Time: 10:40 AM – 11:00 AM

Authors

Abstract

Beaver Dam Analogues (BDAs) are an inexpensive, biodegradable form of stream restoration that function similarly to natural beaver dams. BDAs are expected to help redistribute water spatially into the floodplain and return the stream to a more natural state. Geomorphic changes are expected with the implementation of BDAs, including increased sediment retention, aggradation, increased sinuosity, and reduced slope. Coupled with this, vegetation changes are also anticipated. However, evaluations of morphological and vegetation changes associated with BDA restoration sites are limited. Here we show geomorphic changes in the streambed and vegetation changes in the surrounding floodplain around 45 BDAs in Red Canyon Creek, Lander, WY. Our analysis builds on multiple years of observations, as well as recent data acquisition in summer 2023. Deposition and erosion are analyzed with contours created through interpolation of survey points between 2022 and 2023. Changes in vegetation are quantified through histograms from NDVI analysis between 2019 and 2022. This work offers an understanding of what changes may occur when BDAs are implemented as a restoration technique.

Geological Society of America Abstracts with Programs. Vol. 56, No. 1

doi: 10.1130/abs/2024NE-397372

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