 |
2007 Ground Water Summit |
Wednesday, May 2, 2007 : 1:00 p.m.
Beyond USCS- Sand Petrography as a Hydrostratigraphic Investigative Tool for the City of Davis, California
Deep aquifer studies in conjunction with UC Davis and the City of Woodland have included development of a hydrogeologic conceptual model. However, the Pliocene paleogeography during deposition of the Tehama Formation, including sediment sources and transport directions, remained unclear. A new line of evidence was recently developed through the use of a petrographic study of the Tehama Formation sands in the cuttings of two new 2000-ft. deep water supply wells in
The results provided conclusive evidence for derivation of the sands from the Coast Ranges west of
The understanding of dispersal directions of the sand allows inferences to be drawn regarding the architecture of subsurface sand bodies, recharge sources, interference, and sustainability. Analyses of additional samples from future wells in the
Martin G. Steinpress, PG, CHG, Brown & Caldwell Martin G. Steinpress, PG, CHG, BC National Groundwater Resources Leader, earned a bachelor’s in geology from University of California, Santa Barbara in 1977, and a master’s degree in geology from the University of New Mexico in 1980 with postgraduate work in hydrogeology. He works with municipal, state, and federal agencies and private clients to manage groundwater investigations and water resources projects, and has provided technical leadership on numerous groundwater resources projects in California, Hawaii, and other western states. He is a Director of and past Vice President of GRA.
Robert A. Beggs, PE, Brown & Caldwell Robert A. Beggs, P.E., received Bachelor of Science degrees in Mechanical Engineering and Agricultural Engineering from the University of California, Davis in 1977, an M.S. in Agricultural Engineering from Utah State University in 1981, and a Ph.D. from UC Davis in Biological Systems Engineering in 2005. He has 22 years of experience in environmental engineering and soil-water systems. His particular areas of expertise include engineering and project management for wetlands systems, water reclamation, groundwater quality, agricultural irrigation, water resources planning, biosolids reuse, and food processing wastewater systems. Mr. Beggs has substantial expertise in soil-water and groundwater quality monitoring.
Raymond Ingersoll, Ph.D., UCLA Raymond V. Ingersoll is Professor of Geology in the Department of Earth and Space Sciences at UCLA, since 1982. Received MS (1974) and PhD (1976) from Stanford University, and AB (1969) from Harvard University. His specialized interest is in the use of sand and sandstone in provenance studies; his broader interest is in the tectonics of sedimentary basins and regional paleotectonics. His primary research areas have been in the late Mesozoic forearc of northern and central California, the Cenozoic Rio Grande rift of northern New Mexico and southern Colorado, and the Cenozoic basins of southern California.
Jacques DeBra, City of Davis Jacques DeBra, Senior Utility Resource Specialist, has worked in the resource and utility management fields for 20 years. For the past 16 years he has worked for the City of Davis with a focus on facilitating and enhancing regional water planning efforts, improving utility management, and using outside funding to further many water resources initiatives. Mr. DeBra is a long-time active member of AWWA and is currently Chair of the Water Resources Division in the CA-NV Section of AWWA.