Classification system under development to distinguish among different types of modified channels

SCCWRP and its partners have begun working to build a classification system for distinguishing among different types of modified channels in California – a foundational step toward helping stream managers decide if and how to apply bioassessment tools to this ubiquitous class of streams.

The work, launched last year, involves analyzing bioassessment scores statewide – with a focus on the Central Valley – to understand how different types of channel modifications affect the health of the streams’ biological communities. Researchers also will evaluate how biostimulatory stress from eutrophication factors affects biological integrity.

From these analyses, researchers will develop a statewide system for classifying modified channels based on their bed and bank material.

The classification system is intended to provide more practical insights for managers working through the challenges associated with implementing bioassessment-based monitoring programs for modified channels.