Low Summer Flow Experiment

LTEMP Experimental Action: Aquatic Resource-Related Experimental Treatments (BA, pages 30-41) Low summer flows may be tested in the second 10 years of the LTEMP period, for the purpose of achieving warmer river temperatures (> 14°C) to benefit humpback chub and other native species. Under low summer flows, daily fluctuations would be less than under base operations (e.g., approximately 2,000 cfs). Investigating the anticipated effects of and options for providing warmer water temperatures in the mainstem Colorado River through Grand Canyon is an identified management action in the Humpback Chub Recovery Goals (USFWS 2002a).

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Description of the Low Summer Flow Experiment Objectives Trigger Planning Needs Risks

Links The 2000 Low Summer Steady Flow Experiment Papers and Publications Summary report of responses of key resources to the 2000 Low Steady Summer Flow experiment, along the Colorado River downstream from Glen Canyon Dam, Arizona, 2011 USGS-GCMRC Open-File Report by Barbara E. Ralston Water temperatures in select nearshore environments of the Colorado River in Grand Canyon, Arizona, during the Low Steady Summer Flow experiment of 2000 Other Stuff