Sarah Yarnell

Impacts of Flow Recession Dynamics on Channel Bar Morphology

Habitat Models for the Foothill yellow-legged frog (Rana boylii) in the Sierra Nevada of California

In many current hydropower project relicensing studies, instream flow assessment methods are used to evaluate flow effects and proposed flow prescriptions on fish. These techniques may be applicable to other sensitive aquatic species, such as the riverine-breeding Foothill Yellow-legged frog (Rana boylii). Two major components of flow modeling were...

Pulsed Flow Effects on the Foothill Yellow-Legged Frog (Rana boylii): Integration of Empirical, Experimental and Hydrody...

Four analytical approaches support the hypothesis that altered flow regimes, particularly spring and summer pulsed discharges, contribute to the decline of foothill yellow-legged frogs (Rana boylii) in regulated rivers. (1) A review of literature and FERC re-licensing reports indicates that egg masses are negatively affected by pulsed flows via sco...