The San Francisco Bay Branch is pleased to present:

Isotopic Hydrology: New Approaches to Sustainable Water Management

Amanda Deinhart, Lawrence Livermore National Laboratory

PRESENTATION:

Water is a valuable resource in California, under pressure from population growth, poor historical management and climate change. Lawrence Livermore National Laboratory has been developing state-of-the-art analytical techniques for several decades, to support science-based water resource management in California. The Isotope Hydrology group at LLNL uses naturally occurring isotopes in the environment to trace the origin and movement of water throughout the hydrological cycle, from precipitation, through surface runoff and evaporation, to the flow of surface water and groundwater. Combining stable isotopes of water (deuterium and oxygen-18) with cosmogenic isotopes (tritium, sulfur-35 and sodium-22) and noble gasses, hydrologists at LLNL can determine the source of water, recharge rates and flow paths. Groundwater dating with the tritium-helium method is useful for evaluating contamination risks and origins. LLNL is continuously developing new techniques to answer other challenging questions that stakeholders need to make informed decisions. In this lecture, Ms. Deinhart will give case examples of how LLNL techniques have addressed water resources questions in California.

SPEAKER BIO:

Ms. Deinhart has been an isotope hydrologist at Lawrence Livermore National Laboratory for 6 years, originating as in intern while working on her Master of Science degree from CSU East Bay. While in graduate school, Amanda received the Mary Harrington Outstanding University Thesis Award for her thesis, “Application of Multi-Tracer Methods to Determine Age Distribution of Nitrate Contaminated Wells in Turlock California.” She has continued her work in isotope hydrology in the Environmental Isotope Systems group at LLNL.

DINNER COSTS:

• $50 for Members
• $55 for Non-Members
• $10 for Student attendees

Walk-ins are always welcome with payment by check or cash (please bring exact change if possible).

MEAL OPTION:

Main Course

• Chicken Marsala
• Salmon Alla Bella
• Pasta Primavera (vegetarian)

Walk-ins are always welcome with payment by check or cash (please bring exact change if possible). Meal selection for walk-in registrants will be chosen by the venue and may or may not be from the stated menu. Efforts will be made to accommodate dietary restrictions when possible.

QUESTIONS:
Contact the Branch President, Bill DeBoer (bdeboer@elmontgomery.com) at 925-212-1630.

GRA San Francisco Bay Branch is interested in supporting university science students. Our Scholastic Sponsorship Program is an opportunity to publicize your business while contributing toward a good cause. Please contact the Branch President, Bill DeBoer (bdeboer@elmontgomery.com) at 925-212-1630. for details.

We are actively looking for potential speakers. If you have a topic or suggestion, please contact the Branch President.