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San Joaquin River At Crows Landing 30 June 2010
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CV-SALTS Lower San Joaquin River Committee
History and Background Discussion 30 June 2010
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30 June 2010
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30 June 2010
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Lower San Joaquin River Basin
Stanislaus River Tuolumne River Merced River Stockton Modesto Vernalis Mendota Dam Delta Mendota Canal Crows Landing Friant Dam 30 June 2010 4
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Average Electrical Conductivity SJR Near Vernalis
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Average Electrical Conductivity SJR Near Vernalis
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15-year Running Average Electrical Conductivity SJR Near Vernalis
Friant completed, SJR diverted south Delta water delivered to west side SJV 30 June 2010
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SWRCB Revised Water Right Decision 1641 March 15, 2000
“The Central Valley RWQCB is hereby directed promptly to develop and adopt salinity objectives and a program of implementation for the main stem of the San Joaquin River upstream of Vernalis. As part of its implementation plan for the salinity objectives, the Central Valley RWQCB should evaluate a program to regulate the timing of agricultural discharges to the San Joaquin River.” 30 June 2010
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Flow and Salinity, July 1999 Lander Avenue 60 miles Vernalis
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San Joaquin River Electrical Conductivity
Vernalis Maze Patterson/Crows Landing Hills Ferry Lander 30 June 2010 4
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Salt Load at Vernalis by type
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San Joaquin River At Airport Way (Vernalis) 30 June 2010
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San Joaquin River at Crows Landing (Just below the Merced River confluence)
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Previous Studies 30 June 2010
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30 June 2010
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Studies Interagency Drainage Program
USBR San Luis Unit Drainage Feature Reevaluation Hilmar Cheese SEP Report USGS Studies Larry Walker Modesto area pilot study See reference lists for more 30 June 2010
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KEY REPORT 30 June 2010
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Ongoing Activities South Delta Salinity Objectives
San Joaquin River Flow Objectives San Joaquin River Restoration Project Surface water monitoring program USBR West Side salt and water budget –contract project USBR Program to Meet Standards USBR Recirculation Project Grassland Bypass Project Irrigated Lands Regulatory program Long Term Program development 30 June 2010
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SJR TMDL Unit Presentation
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Needs Identified Crop salt tolerance review Achievability analysis
Cost analysis Environmental review NOTE: No evaluation of Beneficial Uses was planned 30 June 2010
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San Joaquin River 2004 Salt and Boron TMDL
Addresses both point and nonpoint source discharges Basin broken into subareas and priorities established Includes compliance timetable 8 to 20 years to come into compliance 30 June 2010
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Lower San Joaquin River Subareas
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Salt Load at Vernalis by Subarea
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2004 Salt and Boron TMDL Point Source Dischargers
Salinity levels must be below water quality objectives 30 June 2010
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2004 Salt and Boron TMDL Nonpoint Source Dischargers
Real-time encouraged – can operate under waiver Fixed base loads & WDRs for others Loads allocated by acreage Supply water credits and other factors 30 June 2010
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2004 Salt and Boron TMDL Nonpoint Source Dischargers
No regulation if- Discharge ceases Conductivity below 315 µS/cm 30 June 2010
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2004 Salt and Boron TMDL USBR
Load allocation Management Agency Agreement or Waste Discharge Requirements 30 June 2010
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USBR Presentation 30 June 2010
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Beneficial Uses P = potential E = existing
Lower San Joaquin River Reach MUN AGR PROC REC-1 REC-2 WARM COLD MIGR SPWN WILD Municipal and Domestic Supply Irrigation Stock Watering Industrial Process Supply Contact Canoeing and Rafting Other Noncontact Freshwater Habitat-Warm Freshwater Habitat-Cold Warm Cold Wildlife Habitat Mendota Dam to Sack Dam P E Sack Dam to Merced River Merced River to Vernalis 30 June 2010 P = potential E = existing
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