7:30 PM-Meeting: . . . Bloch Lecture Hall (TCSEQ Room 201)
see Map showing Mitchell
Map showing Bloch
Anyone wishing to attend the lecture only is welcome at no cost.
This will be the 362nd meeting since 1954.
Abstract
Marine geochemists and ecologists who are interested in geochemical cycles and biological productivity in the coastal zone have long been able to measure freshwater, nutrient, and contaminant inputs from surface water discharge. Groundwater inputs have been much more difficult to quantify. Terrestrial hydrogeologists have been recruited by marine scientists to participate in a series of intercomparison experiments to evaluate multiple techniques for determining submarine groundwater discharge (SGD). Marine scientists have measured point discharge of groundwater at the shoreline using seepage meters and have employed spatially-averaged techniques using geochemical tracers (chloride, radium, radon, etc.). Hydrogeologists employ a variety of calculational approaches, ranging from a simple Darcy's Law calculation to complex numerical models or water budgets. It is hoped that the use of multiple methods in the experiments will reduce uncertainties and increase confidence in a specific method. To date, four experiments have been carried out (Florida, western Australia, Long Island, southeastern Brazil) which have clarified some issues and raised others. It soon became clear that marine scientists and hydrogeologists approach the problem from, both literal and philosophically, opposite directions. What was to be included in the definition of SGD? How can one distinguish between SGD of terrestrial origin and SGD from recirculated seawater? Results and some preliminary conclusions from these experiments will be discussed.
(NOAA photo from Florida)
About the Speaker
Dr. June A. Oberdorfer is a hydrogeologist who has been on the faculty of the Department of Geology at San Jose State University since 1983. At SJSU she teaches introductory and advanced courses in hydrogeology, and courses in environmental geology and hazardous materials. She received her undergraduate degree in geology from the Stockholms Universitet in Sweden and her Ph.D. from the University of Hawaii-Manoa. Her research interests include groundwater/marine water interactions, quantifying groundwater recharge, and applied numerical modeling. She is a Registered Geologist and Certified Hydrogeologist in California.
June Oberdorfer
Reservations: The preferred way to make reservations is simply to email Janice Sellers at janice@seismosoc.org by April 9, tell her you will attend, commit to pay, and bring your payment to the meeting. Janice always emails a confirmation; if you don't get one, assume email crashed yet again and email her a second time. A check made to "PGS" is preferred, payable at the meeting.
If you want to pay in advance:
Stanford faculty and students: Please make dinner reservations by April 9. Contact Dr. Juhn Liou via his mailbox (and leave check), Geological and Environmental Sciences Office, Geocorner - Bldg. 320 (Rm. 118). Make checks out to "PGS."
All others, including faculty and students from other Bay Area universities and colleges and USGS: Please make dinner reservations by April 9. Contact Janice Sellers, at Seismological Society of America, 201 Plaza Professional Building, El Cerrito, CA 94530, phone (510) 559-1780. Send check made out to "PGS" to Janice.
Dinner is $30.00. Includes wine (5:30 to 6:15 PM.), dinner (6:15-7:30 PM.), tax, and tip.
For students from all universities and colleges, the dinner, including the social 3/4-hour, is $5.00 and is partially subsidized thanks to the School of Earth Sciences, Stanford University (Note, no-show reservations owe the full price).
Doris, whose wonderful crew prepares our meals, asked that we let you know that people who are late RSVP'ing and people who show up without a reservation will be welcome but that they will be eating on paper plates with plastic utensils (food supply permitting).
Dues for Academic Year 2003-2004 ($10.00) should be sent to Janice Sellers, Seismological Society of America, 201 Plaza Professional Building, El Cerrito, CA 94530. Janice's phone: (510) 559-1780.
Officers: Cheryl Smith, President; Mike Diggles, Vice President; Vicki Langenheim, Secretary; Janice Sellers, Treasurer; Adina Paytan, Field-Trip Czarina
Date created: 03/15/2004
Last modified: 03/15/2004
Created by: Mike Diggles, Vice President, PGS.
c/o U.S. Geological Survey, MS-951, 345 Middlefield Road, Menlo Park, CA 94025. (650) 329-5404. email Mike Diggles at mdiggles@usgs.gov
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