Influence of hydropower outflow characteristics affecting riverbank stability: The lower Osage River case (Missouri, USA)

Hydrological Sciences Journal
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Abstract

This research examined the influences of outflow characteristics affecting riverbank stability. The 130 km stretch of the lower Osage River downstream from Bagnell Dam (Missouri, USA) provided an excellent case study for this purpose. The integrated BSTEM model with the HEC-RAS model was accurately calibrated and validated with data from the U.S. Geological Survey (USGS). Then, the outflow characteristics (peak flow duration, flow drawdown rate, and low flow duration) were investigated individually. The results of this study showed that: 1) Riverbank stability is little affected by the duration time of the peak flow, especially on the reaches far from the dam. 2) Sudden flow drawdown significantly reduces riverbank stability. However, the impact of the drawdown rate decreases with distance from the dam. 3) The duration of the low flow after peak flow influences the riverbank stability value proportional to the distance from the dam. The time of low flow before failure increases as the distance from the dam increases.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Influence of hydropower outflow characteristics affecting riverbank stability: The lower Osage River case (Missouri, USA)
Series title Hydrological Sciences Journal
DOI 10.1080/02626667.2020.1772974
Volume 65
Issue 10
Year Published 2020
Language English
Publisher Taylor and Francis
Contributing office(s) WMA - Earth System Processes Division
Description 10 p.
First page 1784
Last page 1793
Country United States
State Missouri
Other Geospatial Lower Osage River
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