Flow Team Recreation Impact Analysis Concept California Department - PowerPoint PPT Presentation

Flow Team Recreation Impact Analysis Concept California Department of Water Resources December 2016

Background • Recreation impacts brought up as a concern at the TMC • Variable late winter flows will affect winter fishing season. • Summer impacts will continue to be similar but need to be evaluated as well

Recreational Uses • Winter (Oct to April) – Bank Fishing - ?????? – Boat Fishing • Summer (May-Sept) – Bank Fishing - Boat Fishing – Rafting -Swimming/Camping – ?????

Winter Recreation • Fishing (tapers off in March and more so in April) • No significant amount of rafting or other uses • Boat fishing has extensive use through February with less in March and very little in April • Bank fishing limited significantly by flow rates

Winter Recreation Impact Estimate (boat fishing) • Impacts from flow changes based on month and fishing type • Any day with a significant flow increase through February would be an impact of (1) • Any day with a significant flow increase in March would be an impact of (0.75) • Any day with significant flow increase in April would be an impact of (0.25) • Flow decreases would be an impact of half the increasing impact for that time period, i.e. (February would be 0.5)

Winter Recreation Impact Estimate (Wade fishing) • Similar to boat fishing with the exception that at any flow above 750 cfs creates a impact of (1) regardless of month

Winter Recreation Impact Estimate (Combining Results) • Boat fishing is 75% of total use • Combining the results will create a number to use to compare the proposed hydrographs impacts on recreation.

Winter Recreation Impact Analysis Critical Dry Year • Alt 1 = 11.7 • Alt 6 = 16.4 • Alt 7 = 16.3 • Alt 8 = 14.9

Summer Recreation impact analysis • Working with Aaron Martin to determine fishing impacts. • Requesting TAMWG assistance with input on other recreation issues. • Contacting local businesses i.e. lodge in Lewiston to determine summer flow impacts if they very from ROD flows. • Very much still under construction.

Questions/Discussion