Fishery Habitat Characterization and Identification of Restoration Opportunities: Stevens Creek

Valley Water requires experienced, and qualified firms to provide professional services to characterize existing habitat conditions using field data collection and topographic surveys as the basis for ecohydraulic habitat modeling and bioenergetics modeling for salmonids in the Stevens Creek watershed.

Goal 1: Accurately Quantify Spatiotemporal Habitat Capacity for CCC Steelhead

• Objective 1.1: Move beyond static acreage by outputting models that translate depth and velocity directly into Viable Salmonid Population (VSP) parameters (abundance, productivity, spatial structure, and diversity) to evaluate carrying capacity against recovery targets for Stevens Creek steelhead.
• Objective 1.2: Stratify carrying capacity models by distinct juvenile size classes (Fry, Parr, Smolt) to ensure flow management prioritizes the entire life cycle of steelhead.

Goal 2: Integrate Thermodynamic Realities into Flow Management

- Objective 2.1: Ensure biological effectiveness by coupling hydraulic outputs with recognized thermal thresholds, cross-referencing mapped habitat against the limits for steelhead metabolism, incubation, and smoltification.

Goal 3: Support Life-History Diversity and Resilience

• Objective 3.1: Design the habitat simulation to measure floodplain and channel capacity for diverse rearing strategies, validating habitat for extended-residence phenotypes versus rapid outmigrants.
• Objective 3.2: Establish quantitative flow-habitat relationships that test the efficacy of managed pulse flows, and validating triggers to stimulate safe outmigration across the salmonid assemblage.