Improving Water Quality and Fisheries in Franks Tract: Project Overview and Alternatives
The Franks Tract Project aims to enhance the water quality of export water while benefiting local fisheries. Alternatives considered include modifications to water flow in Three Mile Slough and West False River using operable gates. The project involves managing water during different tidal conditions to improve water quality and fish habitats, assessing both flood and ebb tide impacts. Coordination with Sacramento and San Joaquin Rivers is essential to achieve desired outcomes. This report highlights operational strategies and environmental considerations for the project.
Improving Water Quality and Fisheries in Franks Tract: Project Overview and Alternatives
E N D
Presentation Transcript
Franks Tract Project Ajay Goyal Department of Water Resources August 9, 2007
Project Objective To improve the water quality of export water and possibly benefit fisheries
Franks Tract Project - Alternatives • Three Mile Slough • West False River
West False River Alternative Three Mile Sl. Sacramento River San Joaquin River Operable Gates Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Operable Gates Sacramento River San Joaquin River Three Mile Sl. Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Three Mile Sl. Sacramento River San Joaquin River FLOOD TIDE Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Three Mile Sl. Sacramento River San Joaquin River EBB TIDE Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Three Mile Sl. Sacramento River San Joaquin River NET FLOW Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Three Mile Sl. Sacramento River San Joaquin River NET FLOW EXPORTS FLOWS Old R i v e r False River FRANKS TRACT San Joaquin River
Three Miles Slough Alternative Three Mile Sl. Sacramento River San Joaquin River Close on EBB Tide Old R i v e r False River FRANKS TRACT San Joaquin River
Obermeyer Gate - Cross Section GATE PANEL IN RAISED POSITION GATE PANEL IN LOWERED POSITION
Three Mile Slough -CLOSED During Portion of Ebb Tide Base Condition
Base Condition Three Mile Slough- CLOSED
Particle Tracking SummaryJune 19963000 Particles Released - Near Rio Vista CVP - Base SWP - Base CVP - TMS Gate Closed SWP - TMS Gate Closed Net Daily Average Flow Diversion = 3000 cfs for July
Possible Operations of Three Mile Slough Gate • Closed during portion of ebb tide • Benefit Fisheries • Improve WQ • Can be used in lieu of DCC gates • Complete closure for some time • Benefit Fisheries • Degrade WQ • Closed on Portion of Flood Tide • ???
Important Points • Strategically located between Sacramento River and San Joaquin River • Capability to move net flows INWARD or OUTWARDS • Three Mile Slough much smaller than Sacramento River • Sacramento River - 2500 ft wide • Three Mile Slough - 550 ft wide
Discussion Ajay Goyal 916-651-9823 agoyal@water.ca.gov
