sjr delta presentation

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Sacramento - San Joaquin Delta Region: 

Sacramento - San Joaquin Delta Region Karl Winkler, Chief, Central District Division of Planning and Local Assistance Department of Water Resources

Sacramento- San Joaquin Delta: 

Sacramento- San Joaquin Delta The Delta is at the confluence of the Sacramento and San Joaquin rivers. Its network of waterways conveys runoff toward San Francisco Bay and the Pacific Ocean to the west. Modified System: Levees, Infrastructure, Invasive Species, Water Quality


Background 1870: Levee Construction begins; Commercial farming 1880: Commercial fishing; striped bass and American shad introduced 1930’s: Flood Management System - Yolo bypass 1951: Delta Mendota Canal Pop. = 10 million 1959: Delta defined in Water Code (Delta Protection Act) 1959: Burns Porter

Background (con’t): 

Background (con’t) 1970’s: NEPA, CEQA, CWA, NPDE, ESA, SWRCB, UWMPA, LEVEES; State Population = 20 million 1980’s: Coordinated Operations Agreement, 4 Pumps, NBA, PL 84-99, Winter Run listed, Marsh Agreement, Invasive Species 1990’s: Current Monterey Agreement, CVPIA, Biological Opinions, Smelt, CALFED, DPC, Delta Vision, Climate Change, Integrated Regional Water Management 2050: State Population = 60 million

Sacramento- San Joaquin Delta Facts: 

Delta Region Population (2000 Census) – 462,000 Counties – Portions of Alameda, Contra Costa, Sacramento, San Joaquin, Solano and Yolo Counties Major cities partly within the Delta – Sacramento, Stockton, West Sacramento and Oakley; Rapid growth in and near Elk Grove, Tracy, Brentwood and Rio Vista Covers 738,000 acres; 700 miles of waterways; 1,100 miles of levees 538,000 acres of agriculture; 64,000 acres of urban & commercial use; open water covers 60,000 acres; remainder of region is undeveloped natural plant vegetation Water from Delta serves 25 million people; irrigates more than 3 million acres of agricultural lands 1.3 MAF applied water - yr 2000 Sacramento- San Joaquin Delta Facts This aerial photograph shows islands within channels in the central and northern Delta.

Sacramento- San Joaquin Delta Facts: 

Sacramento- San Joaquin Delta Facts Carries 47% of California’s total annual runoff; conveys runoff towards the Pacific Ocean from 40% of State’s land area Peak Ag diversion during summer months is 4,000 cfs with 1, 800+ diversions totaling over 1 million acre-feet annually; $2 billion of $31 billion state economy Main crops – corn, grain & hay, alfalfa, pasture, tomatoes, fruit, asparagus, safflower, pears and grapes Wildlife – 52 mammals, 22 reptile and amphibian species, 225 birds, 54 species of fish, including ~260 invasive species Recreation – user days annually 12 million, including visitors to 290 shoreline recreational areas, 300 marinas, and about 500,000 boaters Farming on Sherman Island. Delta crops average a gross value of over $2 billion per year.


Water Facilities State Water Project: California Aqueduct, Harvey O. Banks Delta Pumping Plant, and the North and South Bay Aqueducts Federal Central Valley Project: Tracy Pumping Plant, Delta-Mendota Canal, Delta Cross Channel and Contra Costa Canal Infrastructure Aerial photo of Harvey O. Banks Delta Pumping Plant Locally-Funded Facilities: East Bay Municipal Utility District (Mokelumne) Aqueduct and the City of Vallejo pipeline Railroads - Southern Pacific/Union Pacific, Atchison, Topeka & Santa Fe, Sacramento Northern Two major ship channel systems Pumps and irrigation systems to support $2 billion Agriculture Industry Homes, marinas, and boat slips


Federal and State Highways – Interstate Highways 5, 80, 205 and State Highway 99 traverse the periphery of the Delta Road access to more central Delta areas is provided by State Highways 4, 12, and 160 and numerous County Roads Underground gas fields and storage areas throughout Delta PG&E pipelines; new construction $60 million Numerous power transmission lines up to 500 kilovolts cross Delta islands and waterways Infrastructure Rio Vista bridge on State Highway 12

Delta Hydrology, Hydrodynamics and Operational Criteria: 

Delta Hydrology, Hydrodynamics and Operational Criteria Upstream Watershed 31 PA’s, 108 DAU balances (valley) 78 Groundwater basins (valley) 37 reservoirs over 100,000 AF (valley), with total capacity 27,000 TAF Carries 47% of California’s total annual runoff; conveys runoff towards the Pacific Ocean from 40% of State’s land area Tidal influence

Delta Hydrology, Hydrodynamics and Operational Criteria: 

Delta Hydrology, Hydrodynamics and Operational Criteria Complex operating rules SWRCB, ESA, Flood Control, Navigation, Court Decisions, Contracts, CVP OCAP, SWP/CVP Coordinated Operations Agreement; CVPIA 200 MAF total and 70+ MAF runoff 70+ percent rule precipitation/demand 25 million people Climatic and geographic variability Sept- April, 60 MAF vs 6 MAF yearly; 500,000 cfs daily

Slide 11: 

Inflows to Sacramento- San Joaquin Delta Imports in Dark Blue

Slide 12: 

Outflow/Exports in Light Blue Outflow and Exports from Sacramento- San Joaquin Delta

Policy Initiatives: 

Policy Initiatives FloodSAFE Initiative Reclamation Board Oversight PL 84-99 Delta Risk Management Strategy Delta Vision CALFED Bay Delta Program Prop 1E & 84 Grants State Water Plan Update

Policy Initiatives: 

Policy Initiatives Delta Protection Commission City & County General Plans Climate Change Initiatives PPIC Report Governor’s Plan for California’s Water Future, $1 billion for Delta sustainability ACWA Blueprint US NMFS Salmonids Recovery Plan US FWS Native Fish Species Recovery Plan

State of the Region: 

Delta is “Broken” Cease and Desist Order Delta Smelt decline Actions to limit exports Flood events Stakeholder satisfaction State of the Region Levee break in the 2004 flood of Jones Tract

State of the Region (con’t): 

DOF 2050 projections of 60 million Mercury 303(d) list THM’s Invasive species Toxics Earthquake projections/ water reliability (a 6.5 Magnitude Earthquake in the western Delta could lead to a net economic cost of $30 to $40 billion) State of the Region (con’t) Bay Area Fault Map

Delta Projects and Studies: 

South Delta SWP/CVP intertie and integration plan Los Vaqueros expansion In-Delta Storage CCC Ag drains Franks Tract Delta Cross Channel and Conveyance Ecosystem Restoration Program Levees Recreation Delta Projects and Studies The delta is a popular area for water-based recreation such as fishing, sailing, and water-skiing. South Delta: Head of Old River Barrier


QUESTIONS The Bay-Delta is the West Coast’s largest estuary, with 57 major reclaimed islands and numerous unleveed channel islands.

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