1 / 8

Modeling Issues of the Delta Salinity

Modeling Support Branch Bay Delta Office. Modeling Issues of the Delta Salinity. Jamie Anderson Ph.D., P.E. CWEMF Workshop February 6, 2007. Delta Salinity Modeling Issues. Choice of parameter (Jamie Anderson) Cross sectional variation in salinity (Pete Smith) Vertical stratification

idola-barry
Download Presentation

Modeling Issues of the Delta Salinity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Modeling Support Branch Bay Delta Office Modeling Issues of the DeltaSalinity Jamie Anderson Ph.D., P.E. CWEMF Workshop February 6, 2007

  2. Delta Salinity Modeling Issues • Choice of parameter (Jamie Anderson) • Cross sectional variation in salinity (Pete Smith) • Vertical stratification • Lateral variations

  3. Salinity Parameters for Calibration • Electrical Conductivity (EC) • A measure of the ability of water to conduct an electric current between electrodes (uS/cm), indirect measurement • Total Dissolved Solids (TDS) • A quantitative measure of the residual minerals dissolved in water that remain after evaporation of a solution (mg/l) • Practical Salinity Units (PSU) • Unitless scale used in oceanography defined by the ratio • Corrections for field conditions Values range from 2-42 Ocean water  35 psu

  4. Salinity Parameters (cont.) • Additional salinity parameters • Chloride – taste, industrial process • Bromide – DBP (THMs, bromate) precursor • Sodium – health • Hardness – M&I uses and • Nitrates and sulfates – Ag uses • Water quality standards • Current WQ Control Plan uses EC and chlorides • Bromide may be added for Safe Drinking Water Act

  5. Salinity Parameters for Calibration Suits, 2002 Annual Report CH6 Calibrating DSM2-QUAL Dispersion Factors to Practical Salinity

  6. DSM2 Salinity Simulations • EC • Simulated directly • Calibrated • TDS, Chlorides, Bromides, etc. • Typically not simulated directly • Converted from simulated EC using regression equations that vary by • Location • Hydrologic year type • Season

  7. EC vs TDS Figure D-1. Simultaneous measurements of total dissolved solids concentration and electrical conductivity . c. In Old River near Highway 4 Crossing between March 1989 and February 1998

  8. EC vs Chlorides Figure D-2. Simultaneous measurements of chloride concentration and electrical conductivity. c. In Old River near the Los Vaqueros intake between March 1989 and January 1998

More Related