Generating Water Quality and Climate Data at DSM2 Boundaries for Temperature and Dissolved Oxygen Studies of the Delta. Hari Rajbhandari, Ph.D., P.E.

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1 Generating Water Quality and Climate Data at DSM2 Boundaries for Temperature and Dissolved Oxygen Studies of the Delta California Water and Environmental Modeling Forum Asilomar March 1-3, 2005 Hari Rajbhandari, Ph.D., P.E. Delta Modeling Section California Department of Water Resources

and Environmental Modeling Forum Asilomar March 1-3, 2005 Hari

2 Overview Planning Studies Data Need Data Development Final Thoughts 2

3 Evaluate impact: Planning Studies Change in system operations Comply with water quality standards Delta configuration / flow control Conveyance facilities Develop impact mitigation measures Ecosystem Restoration Studies Assess Climate change effects 3

control Conveyance facilities Develop impact mitigation

4 Planning Study Examples using DSM2 In-Delta Storage: DOC, DO, Temp etc. South Delta Auxiliary Flows to augment SJR flow, DO in Deep Water Ship Channel Upcoming San Joaquin River DO TMDL South Delta Improvement program Los Vaqueros Reservoir Expansion Common Assumptions 4

Water Ship Channel Upcoming San Joaquin River DO TMDL South Delta

5 Level of Development (Statewide Demands) CALSIM II 73-year Hydrology (WY 22-94) 16-year Hydrology ( ) Martinez Tide Martinez & River DO, Temp Nutrient DSM2-HYDRO DSM2-QUAL Channel DO, Temperature Delta Barriers Ag Flows & Returns Ag DO & Temp Ag Nutrient Delta Climate 5

River DO, Temp Nutrient DSM2-HYDRO DSM2-QUAL Channel DO, Temperature

6 Overview Planning Studies Data Need Data Development Final Thoughts 6

8 Overview Planning Studies Data Need Data Development Final Thoughts 8

9 Data Development Challenges No continuously measured data before 1984 Blocks of missing data within continuous IEP data Strategy IEP Data and Year-type: no distinct relationship Recent data extrapolated to years prior to IEP data (will explain later) Fill in missing data using interpolation or generated data 9

no distinct relationship Recent data extrapolated to years prior to IEP data

11 Historical to Planning Year: Temp. & DO Planning year Historical Year Historical Year San Joaquin Boundary Martinez Boundary Sacramento River Boundary

Martinez Boundary Sacramento River Boundary 1974 1998 1999 11 1975 1999

12 Historical to Planning Year Contd. Planning Year Historical Year Historical Year San Joaquin Boundary Martinez Boundary Sacramento River Boundary

Martinez Boundary Sacramento River Boundary 12 1983 1999 1999 1984

13 13 Hourly DO at Mossdale

14 14 Generated Daily DO at Vernalis

15 15 Hourly Temperature at Mossdale

16 16 Generated Daily Temperature at Vernalis

18 18 Hourly DO at Martinez

19 19 Generated Daily DO at Martinez used for

20 Hourly Temperature at Martinez 20

21 21 Generated Daily Temperature at Martinez used for

23 Generated Daily DO at Sacramento River Boundary 23

24 24 Generated Daily Temperature at Sacramento River Boundary

25 Climate Data Air and wetbulb temperature Wind speed Cloud cover Atmospheric pressure Sacramento or Stockton airport National Climatic Data Center Hourly 25

26 Historical to Planning Year for Climate Data Planning Year Historical Year Planning Year Historical Year

27 Hourly Air Temperature, Stockton Temperature ( O F) Jan-99 Apr-99 Jul-99 Oct-99 Jan-00 Apr-00 Jul-00 Oct-00 Jan-01 27

28 Hourly Wetbulb Temperature Stockton 28

29 Boundary Conditions Nutrient Data SJR DO TMDL Studies DWR USGS Reports City of Stockton Jones & Stokes Report 29

30 Nutrient Data at DSM2 Boundaries Parameter Sacramento River (mg/l) Martinez (mg/l) San Joaquin River (mg/l) Organic N Ammonia N Monthly Nitrite N Nitrate N Organic P Phosphate P

31 Monthly Average Ammonia N (mg/l) San Joaquin River at Mossdale (flow-weighted monthly of ) Jan Mar May Jul Sep Nov 31 (derived from Jones & Stokes, 1998)

32 Monthly Average Chlorophyll (ug/l) in San Joaquin River at Vernalis ( ) Jan Mar May Jul Sep Nov 32 (derived from Nieuwenhuyse, 2002)

33 Data for Delta Agricultural Drainage 33 Dissolved oxygen Organic nitrogen as N Ammonia as N Nitrite as N Nitrate as N Organic phosphorus as P Phosphate as P Algae as chlorophyll a Temperature BOD 5.1 mg/l 1. 4 mg/l 0.31 mg/l 0.02 mg/l 1.3 mg/l 0.09 mg/l 0.4 mg/l 1.0 mg/l 22 o C 3.9 mg/l

34 Final Thoughts Efforts to develop the data for planning studies provide an important milestone. Further data refinement will likely continue. In using the data in the present form, consideration should be made based on the location and the objectives of the study. For preliminary assessments of studies, these data sets appropriate in most cases. Sensitivity analysis to indicate extent of uncertainty due to data extrapolation or other approximations. 34

35 Contact Information (916) Modeling Support Website: Online Bulletin Board for DSM2 Users: 35

36 36 The End

37 DO Sources and Sinks Heat Exchange Atmospheric Reaeration Air-Water Interface BS Organic-N B NH3 B NO2 B NO3 R G O O R D I S S O L V E D O X Y G E N Algae Sediment B CBOD Organic-P Dissolved-P s s s BD P M G B R BS 37

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