Department of Land, Air, and Water Resources

Research Projects in the San Joaquin Valley

Randy A. Dahlgren

Teresa Fan

Microphyte-Mediated Se Biogeochemistry and its Role in Bioremedation of Se Ecotoxic Consequences (Kesterson) (Co-PI Rick Higashi)
In Situ Selenium Bioremediation Utilizing Biochemical Transformation by Assemblages of Aquatic Photoautotrophs (Kesterson) (Co-PI Rick Higashi)
In Situ Se volatilization and form measurements at San Joaquin Valley evaporation basins. (Co-PI Rick Higashi)
Historical-scale biochemical markers of oxidant injury and exposure in pines (field sites in SJ Basin (Co-PI Rick Higashi)

Robert G. Flocchini

Sources and sinks of PM10 in California’s San Joaquin Valley (Co-PI’s: Robert Flocchini, Randy Southard, Kate Scow)

Graham E. Fogg

Multi-Scale Heterogeneity of Stream-Dominated Alluvial Fan: New Perspective and Implications for Transport (DBCP - Fresno area) (LAWR Co-PI Singer)
New Approach for Assessing Regional Groundwater Vulnerability to Contamination (DBCP - Fresno area)
Groundwater – Surface Water Interaction as Related to Ecosystem Processes, Cosumnes Basin

Steve R. Grattan

Growth, quality, and suitability of the halophyte Salicornia bigelovii as the final crop in the reuse sequence (West side)
Install Line-Basin Field Lysimeters

David A. Goldhamer

Using Buried Deep Irrigation to Reduce Disease Related Fruit Damage in Fig
Best Management Practices for Irrigation Management of Orchards and Vineyards
Regulated Deficit Irrigation for Orange under High Evaporative Demand in California
Best Management Practices for Irrigation Scheduling of Fruit Orchards

Blaine L. Hanson

Modifying Subsurface Drainage System for Regulating Drainage of Agricultural Drainage Water
Rapid Assessment of Field Wide Soil Salinity
CO-PI with Don May – Subsurface Drip Irrigation of Processing Tomato Under Saline Shallow Water Table Conditions (Westlands Water District)
CO-PI with Blake Sanden – Improving Pre plant Furrow Irrigation in the Lost Hills Water District

Thomas Harter

Occurrence and Fate of Cryptosporidium in Groundwater
Long-Term Risk Analysis of Irrigation and Groundwater Management Impacts on Water Quality of the Non-Shallow Aquifer Systems in the Western San Joaquin Valley
Groundwater Calibration and Sensitivity Analysis
Impact of Dairy Waste and Nutrient Management on Shallow Groundwater Quality (Co-PI’s Horwath and Meyer)
Long Term Nitrate Leaching Below the Root Zone (Co-PI Horwath)
Impact of Waste management on Chronic Exposure of Dairy Cattle to Well Water Nitrate
Nitrate Transport to Groundwater in a Tree Fruit Orchard

Jan W. Hopmans

Soil Quality Assessment in Irrigated Agriculture: Influence of Soil and Water Management on Physical Properties

William R. Horwath

Examining soil quality parameters in the "Biologically Integrated Farming Project" Gamani Jayaweera
Redox Status and Degration Kinetics of Representative Triazine Urea Herbicides in Soil-Water Systems (San Joaquin Valley)

Miguel A. Marino

Conjunctive Management of Water Resources in Los Banos-Kettleman City Area to Control Land Subsidence

Roland D. Meyer

CO-PI with T. Harter and W. Horwath, Impact of dairy waste management on groundwater quality
CO-PI with T. Harter, Use of dairy lagoon water in production of forage crops

Stuart Pettygrove

Site Specific Farming Information Systems in a Sacramento Valley Rotation and a San Joaquin Valley Cotton Rotation
Residual effects of biosolids, manure, yard trimmings, and composted gin trash in a cotton rotation, Shafter Field Station
Several extension talks per year in the SJV aimed at Certified Crop Adviser continuing education

Terry L. Prichard

Management of Zinfandel to Modify Vine and Wine Characteristics (Lodi-Woodbridge Winegrape Commission)
Management of Merlot to Modify Vine and Wine Characteristics (Lodi-Woodbridge Winegrape Commission)
Walnut Reduced Risk Management Program

James H. Richards

Flooding, competition, and nutrient relationships of valley oak riparian forest species, Cosumnes River Preserve

Dennis E. Rolston

Engineering emerging urban systems: Competing land uses, and the effects on built and natural environments (SJV), NSF grant, cooperating with engineering faculty (LAWR Co-PI’s Rolston, Scow, Fogg)

Richard L. Snyder

Improved Evapotranspiration and Crop Coefficient information for California Water Resource Planning
Predicting Reference Evapotranspiration
Measurement of ET from the tule plantations in the Sacramento-San Joaquin Delta.
Several Frost Protection projects in Tulare County
Pistachio Disease Control, Tulare County
Almond Disease Control, Kern County
Development of new crop coefficients and computer programs to help farmers in the San Joaquin Valley with irrigation scheduling.

Randy J. Southard

Bulk and rhizosphere pH indicators of soil quality: A comparison of agriculturally-acidified and naturally-occurring acid SJV soils
Pulmonary fibrosis and silica exposure (human lung specimens from the Fresno area)
Chemistry, mineralogy, and amelioration of agriculturally induced acidity in SJV (Co-PI Bob Zasoski)
Integrated evaluations of minimum disturbance production systems in California's San Joaquin Valley, West Side Field Station
Near-source exposure to crystalline silica and fine mineral fibers in California (Includes field sites in SJV)

Kenneth K. Tanji

Application of TEAPS for the Evaluation of Selenium Redox Chemistry in the TLDD Wetland Systems
Removal of Selenium from Drainage Water Before Discharge into Evaporation Basins
DOC Production from Cultivated Organic Soils on Twitchell Island, Sacrament-San Joaquin Delta

Wesley W. Wallender

Water and Land Management in Irrigated Ecosystems (Center of Excellence for Climate, Environment and Water Resources Assessment of California) (Firebaugh area) (LAWR Co-PI’s - Harter, Hopmans, Tanji, Hsiao, Fogg)
Economic Analysis of Water and Land Management Options Using and Integrated Hydrologic Models (West side)
Water and Land Management in Irrigated Ecosystems (West side)
Drainage and Regional Groundwater