Final Report September 15, 2002

Pages ii-xiii

Executive summary ..............................................ii Summary tables ...................................................vi Table of contents ................................................viii List of Figures ......................................................x List of Tables .......................................................xii List of Acronyms, Abbreviations and Definitions ...xiii

Pages 1-36 (2 M)

Introduction ..........................................................1 PART 1 - San Joaquin River Basin Hydrology ......6 East side tributaries and return flows .....................6 East-side agricultural discharges ...........................7 West side tributaries and return flows ..................10 Panoche-Silver Creek ..........................................10 San Luis Drain .....................................................11 Mud Slough .........................................................12 Salt Slough ..........................................................13 Crows landing Compliance Monitoring Station .....15 Spanish Grant Drain ............................................16 Hospital/Ingram Creeks .......................................17 Del Puerto Creek .................................................18 Orestimba Creek ..................................................18 West-side diversions ........................................... 20 West Stanislaus Irrigation District diversions ....... 24 West Stanislaus Irrigation District diversion      monitoring....................................................... 25 Patterson Irrigation District diversions      and monitoring ............................................... 27 El Solyo Water District diversions ........................29 Banta Carbona Irrigation District diversions.......... 29 Del Puerto Water District diversions ................... 29 Central California Irrigation District diversions ...... 29 Municipal discharges .......................................... 29 Groundwater accretions ..................................... 30 Groundwater modeling ........................................ 31 WESTSIM model development ........................... 37

Page 37 (1 M)

WESTSIM Subregions Map................................... 37

Page 38 (1.2 M)

WESTSIM Subregions Map................................... 38

Page 39 (745 k)

San Joaquin River Hydrology (AF) Reach 19......... 39

Page 40 (454 k)

San Joaquin River Hydrology (AF) Reach 20......... 40

Pages 42-53 (1 M)

PART 2 - San Joaquin Delta :       Vernalis to Channel Point .............................. 42 Old River ............................................................. 43 South Delta hydrologic factors and changes ....... 44 Diversions downstream of Vernalis ...................... 44 Analysis of Usage ................................................ 45 Riparian irrigation usage ...................................... 45 Riparian pumping capacity ................................... 47 Use of Delta Simulation Model DSM-2 ................. 47 Wastewater treatment plant flows and water quality Merced to Channel Point ..................................... 48 Mobile Home Parks Below Mossdale ................... 52 Stormwater Discharges ........................................ 52 Groundwater Discharges ...................................... 53

Page 54

Literature Cited ........................................................54

Appendicies

A (111) Boat survey of San Joaquin River diversions and drainage between the Deep Water Ship Channel and Mossdale.

B (121 k) Output from the stream budget analysis package of the WESTSIM integrated groundwater-surface water model, currently under development by the US Bureau of Reclamation.

C (638 k) Lookup table to convert Julian day numbers to the day of year calendar.

D1&D2 (158 k) DSM2-Reach

D3-G (292 k) WESTSIM model input data files for stream reaches.

H (520 k) Accuracy, operation and maintenance of Continuous Chlorophyll and Turbidity Sensors (SCUFA)

I (451 k) San Joaquin River diversion data for 2002 : Patterson Irrigation District and West Stanislaus Irrigation District

J (428 k) Annual variation in San Joaquin River diversions :Banta Carbona Irrigation District 1970-2002

K (1.4 M) Installation, operation, maintenance and data reporting at Salt Slough monitoring station at Wolfsen Road Bridge May 19, 2003