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This resource page is presented to provide agencies and the general public with information on monitoring locations, available data, research studies and announcements related to the Grasslands Bypass Project in the San Joaquin Valley of California. 

(last updated 7/27/99) 

General Information 

  • Monitoring Plan document for the Grasslands Bypass Compliance Monitoring Program 

     Monitoring Sites and Current Database 

    • Images of primary monitoring sites and current data. Primary sites are those monitoring sites essential to meeting the goals of the monitoring program (Note: the gif files will take some time to load). 
      • Site A : Grasslands Bypass (Check 17) 
      • Site B : Grasslands Bypass (north of Gun Club Road) 
      • Site C : Mud Slough upstream of Grasslands Bypass discharge. 
      • Site D : Mud Slough at USGS gage. 
      • Site E : Mud Slough at Highway 140. 
      • Site F : Salt Slough at Highway 165 
      • Site G : San Joaquin River at Fremont Ford. 
      • Site H : San Joaquin River upstream of Merced River. 
      • Site I : Mud Slough : Seasonal backwater tributary. 
      • Site J : Camp 13 Canal (north of Main Canal) 
      • Site K : Agatha Canal at Mallard Road. 
      • Site L : San Luis Canal (at Henry Miller Road). 
      • Site M : Santa Fe Canal (at Henry Miller Road). 
      • Site N : San Joaquin River at Crows Landing Bridge. 
      • Site P : Panoche Creek at I-5 Bridge. 
    • Images of selected secondary monitoring sites and existing data. Secondary sites are those monitoring sites that are not essential to meeting the goals of the monitoring program but may provide useful background data. (Note: the gif files will take some time to load). 

    • Monthly data summary reports prepared by the San Francisco Estuary Institute. (First report available December 1996).
    • Reference documents and tables including ecological risk guidelines and drainage selenium load targets. 

       Scientific studies and investigations 

    • SAN LUIS DRAIN DYE STUDY : Members of the Data Reporting Team for the Grasslands Bypass project conducted a dye study to determine drainage residence time in the Grasslands Bypass channel and the San Luis Drain and to observe the degree of longitudinal dispersion within this reach. Longitudinal dispersion affects the ability to match water quality samples between upstream and downstream sites - important for selenium mass balance studies. 
    • MUD SLOUGH DYE STUDY : A second dye study was conducted within Mud Slough to determine the degree of mixing that occurs within the channel segment downstream of the confluence with the San Luis Drain and the downstream Mud Slough monitoring site (Site D) The Mud Slough dye study shows good mixing between the sites for the flow conditions during the experiment as demonstrated by the similarity in dye concentrations between idepth integrated samples taken a three equally spaced locations across the flow. 
    • MICROBIAL ECOLOGY OF AGRICULTURAL DRAINAGE : Professor Terrance Leighton, Dr Nigel Quinn and a team of graduate, undergraduate snd postdoctoral students at UC Berkeley and Lawrence Berkeley National Laboratory have conducted a series of unique experiments to assess the selenium bioremediation potential of bacteria in natural and engineered ecosystems in the Grasslands Basin. The systems studied include the Agatha Canal (a wetland supply canal previously used to convey drainage water), the San Luis Drain (both before and after the start of the Grasslands Bypass Project on September 23, 1996) and the Panoche Treatment system (a joint UCB/LBNL project to demonstrate the potential of an algal-bacterial selenium removal system to reduce selenium loads in agricultural drainwater). 
    • SELENIUM VOLATILIZATION STUDY : Dr Teresa Fan and Dr Rick Higashi (both at UC Davis) and two French scientists, Dr David Amouroux and Dr Herve Pinaly, from the Laboratoire de Chimie Bio-Inorganique and Environment tested a new method for measuring selenium volatilization forms and flux at two full-scale evaporation basins located in the Tulare Lake Drainage District and the Lost Hills Drainage District. These experiments were designed to field-validate laboratory evidence of selenium volatilization from algae isolate from each of these facilities. Of particular interest were the volatile species of selenium produced by the algae. On September 6, 1998 the research team, together with Dr Nigel Quinn (Lawrence Berkeley National Laboratory, measured selenium volatilization flux from the San Luis Drain at Site B. Preliminary analysis of the data confirms the presence of di-methyl selenide (DMSe) in the air above the drainage water at all sites with the TLDD site producing higher DMSe concentrations in both water and air than the LHDD and San Luis Drain sites. Experimental results are published in a report entitled In situ volatilization and form measurements at San Joaquin Valley evaporation basins: by T.W-M. Fan and R.M. Higashi, Jan 1999. This pdf file requires Adobe Reader. 
    • PANOCHE TREATMENT PLANT : An Algal-Bacterial Treatment Facility has been operated for the past two years in the Panoche Water District as a cooperative demonstration program between the University of California, Berkeley, Lawrence Berkeley National Laboratory and the Panoche Drainage District. The first phase of the project was funded by a US Bureau of Reclamation Challenge Grant - continuing work is being funded by CALFED. The Phase 1 project report describes the construction of the plant and initial experiments conducted to achieve consistent selenium load reduction. 

        Real-time flow and water quality data and forecasts 

    • SJRMP Water Quality Subcommittee : Review of real-time flow and water quality forecasts made during the past year for Vernalis on the San Joaquin River.
    • SJRMP Water Quality Subcommittee - Flow, stage and water quality : in the San Joaquin River (past 14 days). This information is published weekly on the SJRWQOP bulletin board and is obtained from CDEC. WARNING : This data is preliminary and subject to error.
    • CDEC Real-time water quality at Vernalis - Vernalis EC. Note this data is preliminary and subject to error.
    • CDEC Real-time hourly stage data at selected stations - San Joaquin River stage data. Note this data is preliminary and subject to error. 

         Related Programs in the Grasslands Basin 

    • California Rivers Assessment (CARA) program.
    • Real-time weather in Northern California from the National Weather Service. Obtain current (satellite imagery) or current (radar imagery). This data is used by the NWS to forecast (precipitation). If you are connected to a network connection or have a fast modem connection to the internet you can also view an (animation) of the current satellite data. 
  • California Irrigation Management Information System (CIMIS)

    •  Daily and monthly rainfall and ET data for Fresno county
    •  Daily and monthly rainfall and ET data for Merced county
    Panoche Water District Newsletter
    • The Panoche Water District publishes a newsletter called the Panoche Fan which provides news of local actions to improve drainage management.  The water districts covered are Panoche, Mercy Springs, Eagle Field and Ora Loma.


    The URL for this page is:

    This page developed and maintained by: 
    Nigel W.T. Quinn 
    Lawrence Berkeley National Laboratory 
    1 Cyclotron Road, 70A-3317K 
    Berkeley, CA 94720 

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