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Research shows mounting erosion at Montopolis stretch of Colorado River linked to impervious cover, researchers say
Summary
A University of Texas researcher told the commission that increased impervious cover and the Longhorn Dam’s hydrology have produced substantially higher erosion rates at Montopolis than at less developed control sites, and requested updated lidar data to refine planning and mitigation.
Liesl Poppenhaus, a researcher at the University of Texas, presented an analysis of human‑induced sources of erosion on the Lower Colorado River at Montopolis.
Poppenhaus said urbanization and increases in impervious cover have altered the river’s hydrology by delivering larger, faster runoff pulses to the channel, a pattern that accelerates bank erosion and…
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