Lower San Joaquin River Committee

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1 Lower San Joaquin River Committee Briefing of New Melones Project and Vernalis Modeling Dan Steiner January 3, 215 1

2 Task Demonstrate effects of changed flow and salinity in the San Joaquin River upon Vernalis flow and salinity and the operations of the New Melones Project. Approach Flow and quality conditions of the San Joaquin River at Maze provided by WARMF. NEWMOM worksheet model used to simulate the river reach between Maze and Vernalis, and the operation of the New Melones Project on the Stanislaus River as affected by differing mainstem flow and quality conditions. Comparison of model results. 2

3 NEWMOM Model Schematic Evaporation Inflow New Melones Reservoir Evaporation Local Inflow Tulloch Reservoir CVP(1) Allocation CVP(2) Allocation Oakdale / South San Joaquin Irrigation Districts Land-use Requirements District Operations Goodwin Reservoir Oakdale Irrigation District Land-use Requirements District Operations Surface Returns from SSJID / OID Stanislaus River Surface Returns from OID Local Inflow / Accretion Surface Returns from MID River Diversions Ripon Surface Returns from MID Diversions Local Inflow / Accretion Surface Returns from River Diversions and Others San Joaquin River Vernalis Confluence Maze Boulevard Surface Returns 3

4 Settings Base New Melones Project June 29 BO RPA (Appendix 2E) w/ extra dry year schedule D1641 Vernalis Base Flow Feb Jun, & no pulse flow D1641 Vernalis WQ (.7/1.) Stanislaus River DO (flow surrogate) OID/SSJID formula entitlements, up to land use requirements SEWD/CSJWCD up to 155 TAF, three tier District proposal WARMF Base depiction of historical flow and quality conditions at Maze Alternative Settings New Melones Project Same as Base WARMF Bundle depiction of flow and quality at Maze 4

5 San Joaquin River at Maze Base and Planned Bundle (input to NEWMON) San Joaquin River Flow at Maze (CFS) (WARMF) WY WY Oct 1992 Oct 1992 Jan 1992 Apr 1992 Jul 1993 Oct 1993 Jan 1993 Apr 1993 Jul 1994 Oct 1994 Jan 1994 Apr 1994 Jul 1995 Oct 1995 Jan 1995 Apr 1995 Jul 1996 Oct 1996 Jan 1996 Apr 1996 Jul 1997 Oct 1997 Jan 1997 Apr 1997 Jul 1998 Oct 1998 Jan 1998 Apr 1998 Jul 1999 Oct 1999 Jan 1999 Apr 1999 Jul 2 Oct 2 Jan 2 Apr 2 Jul 21 Oct 21 Jan 21 Apr 21 Jul 22 Oct 22 Jan 22 Apr SJR Maze Flow - CFS 22 Jul 23 Jan 23 Apr 23 Jul WARMF Planned Case Maze Flow WARMF Base Case Maze Flow Oct 24 Oct 24 Jan 24 Apr 24 Jul 25 Oct 25 Jan 25 Apr 25 Jul 26 Oct 26 Jan 26 Apr 26 Jul 27 Oct 27 Jan 27 Apr 27 Jul 28 Oct 28 Jan 28 Apr 28 Jul 29 Oct 29 Jan 29 Apr 29 Jul 21 Oct 21 Jan 21 Apr 21 Jul 211 Oct 211 Jan 211 Apr 211 Jul 212 Oct 212 Jan 212 Apr 212 Jul 213 Oct 213 Jan 213 Apr SJR Maze Flow - CFS 213 Jul 214 Jan 214 Apr 214 Jul WARMF Planned Case Maze Flow WARMF Base Case Maze Flow

6 San Joaquin River at Maze Base and Planned Bundle (input to NEWMON) San Joaquin River Quality at Maze (EC) (WARMF) WY WY Oct 1992 Oct 1992 Jan 1992 Apr 1992 Jul 1993 Oct 1993 Jan 1993 Apr 1993 Jul 1994 Oct 1994 Jan 1994 Apr 1994 Jul 1995 Oct 1995 Jan 1995 Apr 1995 Jul 1996 Oct 1996 Jan 1996 Apr 1996 Jul 1997 Oct 1997 Jan 1997 Apr 1997 Jul 1998 Oct 1998 Jan 1998 Apr 1998 Jul 1999 Oct 1999 Jan 1999 Apr 1999 Jul 2 Oct 2 Jan 2 Apr 2 Jul 21 Oct 21 Jan 21 Apr 21 Jul 22 Oct 22 Jan 22 Apr SJR Maze Quality - EC 22 Jul 23 Jan 23 Apr 23 Jul WARMF Planned Case Maze EC WARMF Base Case Maze EC Oct 24 Oct 24 Jan 24 Apr 24 Jul 25 Oct 25 Jan 25 Apr 25 Jul 26 Oct 26 Jan 26 Apr 26 Jul 27 Oct 27 Jan 27 Apr 27 Jul 28 Oct 28 Jan 28 Apr 28 Jul 29 Oct 29 Jan 29 Apr 29 Jul 21 Oct 21 Jan 21 Apr 21 Jul 211 Oct 211 Jan 211 Apr 211 Jul 212 Oct 212 Jan 212 Apr 212 Jul 213 Oct 213 Jan 213 Apr SJR Maze Quality - EC 213 Jul 214 Jan 214 Apr 214 Jul WARMF Planned Case Maze EC WARMF Base Case Maze EC

7 San Joaquin River at Vernalis Base and Planned Bundle (output from NEWMON) San Joaquin River Flow at Vernalis (cfs) WY WY Oct 1992 Oct 1992 Jan 1992 Apr 1992 Jul 1993 Oct 1993 Jan 1993 Apr 1993 Jul 1994 Oct 1994 Jan 1994 Apr 1994 Jul 1995 Oct 1995 Jan 1995 Apr 1995 Jul 1996 Oct 1996 Jan 1996 Apr 1996 Jul 1997 Oct 1997 Jan 1997 Apr 1997 Jul 1998 Oct 1998 Jan 1998 Apr 1998 Jul 1999 Oct 1999 Jan 1999 Apr 1999 Jul 2 Oct 2 Jan 2 Apr 2 Jul 21 Oct 21 Jan 21 Apr 21 Jul 22 Oct 22 Jan 22 Apr 22 Jul Vernalis Flow (CFS) 23 Jan 23 Apr 23 Jul Vernalis Flow LSR_Salts_Planned Vernalis Flow LSR_Salts_Base_ Oct 24 Oct 24 Jan 24 Apr 24 Jul 25 Oct 25 Jan 25 Apr 25 Jul 26 Oct 26 Jan 26 Apr 26 Jul 27 Oct 27 Jan 27 Apr 27 Jul 28 Oct 28 Jan 28 Apr 28 Jul 29 Oct 29 Jan 29 Apr 29 Jul 21 Oct 21 Jan 21 Apr 21 Jul 211 Oct 211 Jan 211 Apr 211 Jul 212 Oct 212 Jan 212 Apr 212 Jul 213 Oct 213 Jan 213 Apr 213 Jul Vernalis Flow (CFS) 214 Jan 214 Apr 214 Jul Vernalis Flow LSR_Salts_Planned Vernalis Flow LSR_Salts_Base_5

8 San Joaquin River at Vernalis Base and Planned Bundle (output from NEWMON) San Joaquin River Quality at Vernalis (EC) WY WY Oct 1992 Oct 1992 Jan 1992 Apr 1992 Jul 1993 Oct 1993 Jan 1993 Apr 1993 Jul 1994 Oct 1994 Jan 1994 Apr 1994 Jul 1995 Oct 1995 Jan 1995 Apr 1995 Jul 1996 Oct 1996 Jan 1996 Apr 1996 Jul 1997 Oct 1997 Jan 1997 Apr 1997 Jul 1998 Oct 1998 Jan 1998 Apr 1998 Jul 1999 Oct 1999 Jan 1999 Apr 1999 Jul 2 Oct 2 Jan 2 Apr 2 Jul 21 Oct 21 Jan 21 Apr 21 Jul 22 Oct 22 Jan 22 Apr 22 Jul Vernalis Water Quality (EC) 23 Jan 23 Apr 23 Jul Vernalis Quality - EC LSR_Salts_Planned Vernalis Quality - EC LSR_Salts_Base_ Oct 24 Oct 24 Jan 24 Apr 24 Jul 25 Oct 25 Jan 25 Apr 25 Jul 26 Oct 26 Jan 26 Apr 26 Jul 27 Oct 27 Jan 27 Apr 27 Jul 28 Oct 28 Jan 28 Apr 28 Jul 29 Oct 29 Jan 29 Apr 29 Jul 21 Oct 21 Jan 21 Apr 21 Jul 211 Oct 211 Jan 211 Apr 211 Jul 212 Oct 212 Jan 212 Apr 212 Jul 213 Oct 213 Jan 213 Apr 213 Jul Vernalis Water Quality (EC) 214 Jan 214 Apr 214 Jul Vernalis Quality - EC LSR_Salts_Planned Vernalis Quality - EC LSR_Salts_Base_5

9 New Melones Project Operation Base and Planned Bundle (output from NEWMON) New Melones Project Operation and River Characteristics Planned (1, acre feet) New Melones Goodwin New New OID & Total SEWD CSJWCD Vernalis Total Vernalis Goodwin Release NM Melones Melones Tulloch SSJID OID & NM NM Instream Dissolved Water Flow Release above Forecast Inflow Storage Storage Canals SSJID Water Water Fish Oxygen Quality Objective to River Minimum Index Avg WY EOS EOS WY M F M F M F M F M F M F M F M F ,16 1, , ,512 1, , , ,92 1, , ,876 2, , , ,326 1, ,86 2 1,62 1, , , ,6 New Melones ,737 Goodwin , ,271 New New OID & Total SEWD CSJWCD 25 1,576 1, ,114 Melones Melones Tulloch SSJID OID & NM NM Instream Dissolved 26 2,61 2, ,184 Inflow Storage Storage Canals SSJID Water Water Fish Oxygen , , , , , , ,93 1, , , ,351 New Melones Project Operation and River Characteristics Base (1, acre feet) Vernalis Vernalis Release NM Water Flow Release above Forecast Quality Objective to River Minimum Index Avg 1, WY EOS EOS WY M F M F M F M F M F M F M F M F ,16 1, , ,512 1, , , ,92 1, , , , , , ,374 Total Goodwin ,326 1, ,86 2 1,62 1, , , , , , , ,576 1, , ,61 2, , , , , , , , ,93 1, , , , ,771 9

10 New Melones Project Operation Base and Planned Bundle (output from NEWMON) New Melones Project Operation and River Characteristics minus New Melones Project Operation and River Characteristics Base (1, acre feet) New Melones Goodwin New New OID & Total SEWD CSJWCD Vernalis Total Vernalis Goodwin Release NM Melones Melones Tulloch SSJID OID & NM NM Instream Dissolved Water Flow Release above Forecast Inflow Storage Storage Canals SSJID Water Water Fish Oxygen Quality Objective to River Minimum Index Avg WY EOS EOS WY M F M F M F M F M F M F M F M F

11 New Melones Project Operation In general, the actions and circumstances of the Planned bundle develop changes in flow and quality in the San Joaquin River upstream of the Stanislaus River confluence. At times these changes occur when the New Melones Project operation is providing specific releases to comply with the D1641 Vernalis water quality objective. If the change in upstream San Joaquin River flow and quality requires less water from the Stanislaus River to comply with the downstream water quality objective, New Melones would release less water for that purpose. However, such a reduction in release may be countered or limited by a need to release for a flow or quality requirement such as the D1641 Vernalis flow requirement or Stanislaus River instream dissolved oxygen objectives. During periods when Vernalis flow objectives affected the New Melones operation, changes in flow due to Planned bundle actions and circumstances would cause a corresponding change in New Melones releases, again potentially countered or limited by other release requirements. 11

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