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