Central Valley Project Overview July 2013 Central Valley of California

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Central Valley Project Overview July 2013 Central Valley of California TRINITY DAM FOLSOM DAM LV SL Hydrologic Constraints • Majority of water supply in the north • Most of the precipitation is in the winter/spring • Majority of demand in the south • Most of that demand is in the summer Geographic Constraints Sacramento/San Joaquin Delta Avg Annual Inflow in MAF (Billion Cu Meters) (5.3) 4.3 (1.7) 1.4 (1.1) 0.9 21.2 (26.2) Sacramento Delta Precip Eastside Streams San Joaquin California Water Projects • State Water Project • Central Valley Project • Local Water Projects Trinity CVP Shasta Major Storage Folsom Facilities New Melones Friant San Luis Trinity CVP Shasta Conveyance Folsom Facilities New Melones Friant San Luis CVP Features Summary • 18 Dams and Reservoirs • 500 Miles (800 Kilometers) of Canals • 11 Powerplants • 10 Pumping Plants • 20 Percent of State’s Developed Water Supply (about 7 million acre-feet, 8.6 billion cu meters) • 30 Percent of the State’s Agricultural Supply (about 3 mil acres of farm land, 1.2 mil hectares) • 13 Percent of State’s M&I Supply (about 2 million people served) CVP Authorized Purposes • Flood Control • River Regulation (Navigation) • Fish and Wildlife Needs • Municipal & Agricultural Water Supplies • Power Generation • Recreation TRINITY CVP - SWP FEATURES LEWISTON SHASTA SPRING CREEK POWERPLANT CARR POWERPLANT TINITY RIVER WHISKEYTOWN OROVILLE (SWP) TO SAN FRANCISCO BAY DELTA FOLSOM BANKS PP (SWP) JONES PP NEW MELONES O’NEILL TO SAN FELIPE SAN LUIS FRIANT TRINITY CVP - SWP FEATURES LEWISTON SHASTA SPRING CREEK POWERPLANT CARR POWERPLANT TINITY RIVER WHISKEYTOWN OROVILLE (SWP) TO SAN FRANCISCO BAY DELTA FOLSOM BANKS PP (SWP) JONES PP NEW MELONES O’NEILL TO SAN FELIPE SAN LUIS FRIANT Permits and Agreements Key Operating Agreements and Standards • Water Right Permits • Water Rights Decision 1641 • Biological Opinions • Flood Control Manuals • Central Valley Project Improvement Act • Coordinated Operations Agreement Delta Water Quality Standards Water Quality Standards 1,000,000 2,000,000 3,000,000 4,000,000 5,000,000 6,000,000 7,000,000 0 1978 1980 1982 1984 1986 Total Annual Water Annual ExportsTotal from 1978-2011 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 Total Exports Federal Exports Total State Exports Total System Constraints • Maximize contractual water supply deliveries given the constraints of the system: – Geographic – Hydrologic – Physical Capacity – Flood Control requirements – Environmental (i.e. water quality, outflow) – Contractual, ESA and Water Rights Requirements – Economic – Demand Patterns Questions ? .

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Two-Dimensional Hydraulic Model of Folsom Dam
Michael Pantell, E.I.T. Peterson Brustad Inc. • Model Folsom Dam Flood Scenarios • During Probable Maximum Flood (PMF) • Varying Folsom Dam Outflows • Multiple Breach Locations and Methods • Results • Floodplain Depths • Mortality • Property Damage • Why? • Information not Available to public • To Obtain Masters Degree Built in 1956 Owned by USBR Storage Approx. 1 Mil Ac-ft 12 structures Concrete Main dam Earthen 2 Wing Dams 1 Auxiliary Dam Reference: USBR “Folsom Dam Facility Map” 8 Dikes Sacramento Folsom River Reservoir Sacramento American River Probable Maximum Flood American River 1000000 900000 Peak ≈ 900,000 cfs Basin 800000 700000 PMF 600000 ) cfs Developed by 500000 Flow ( USACE 400000 300000 Project Design 200000 Flood 100000 0 0 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 192 Approx. 25,000 Time (hours) year event Auxiliary Spillway Powerhouse Folsom Dam Flow = 6900 cfs 8 Tainter Gates 5- Main 3- Emergency Auxiliary Spillway Designed to PMF event Dam Outflow 500 PMF Event 490 Overtopping 480 Elevation 470 460 450 440 430 420 410 400 Elevation (NAVD88 feet) Elevation 390 380 370 360 350 50000 100000 150000 200000 250000 300000 350000 400000 450000 500000 550000 600000 650000 700000 750000 800000 850000 900000 950000 1000000 Outflow (CFS) Without Spillway With Spillway Mechanisms Overtopping Piping Earthquake Etc Right Wing Dam Northern Breach Mormon Auxiliary Dam Southern Breach Tallest and longest earthen structures North Earthen structure South Earthen structure LargerMacDonald Breach Von Thun = Longer & MacDonald Formation Von TimeThun & ∝ MacDonald, et. al.et. al. Gillette et. al. Gillette Large Breach Width Long- ft Formation3047 Time 374 3916 331 Von Thun & Gillete Height Small- ft Breach 47 47 76 76 Short Formation Time Formation 4.4 0.8 4.1 0.7 Time (hrs) HEC RAS 5.0 2D Mesh 150 m x 150 m Terrain CVFED 1 m resolution Manning’s n Based on CVFED Land Use Jonkman et.
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