Abstract: Using a Geographic Information System and Hydrogeologic Database to Develop Groundwater Protection and Management Strategies in the Napa Valley

J. K. Baxter, P. Schwarz, D. Whyte, B. Campbell, C. Salazar

A portion of an Environmental Protection Agency grant was used to demonstrate the value of a Geographic Information System in developing a resource-based groundwater protection and restoration program. The Napa valley was chosen for this demonstration. This project has three stages. The first stage consisted of converting readily available data into coverages and developing a monitoring well network. The second stage consisted of developing a hydrogeologic database format, collecting geographic location data with a Global Positioning System instrument; and completing a pilot study which entered the data from selected wells into both the database and other types of geologic software. This pilot study evaluated the database design, the time involved in extracting the data f om files and entering it into the computer, and the feasibility of using geologic software in conjunction with a Geographic Information System. Local agencies were invited to advise and participate in the further development of the hydrogeologic database and in determining the best methods for the protection and management of groundwater. The third stage will continue the development of the database and collection of location data as needed, provide interpretations of the database information, develop groundwater protection strategies, and provide public outreach. The information developed for the Napa Project should improve the current understanding of the Napa basin as well as provide geologic evaluations of aquifer characteristics, water level data, and chemical concentrations for use in the development of better groundwater management and protection strategies.

AAPG Search and Discovery Article #90958©1995 AAPG Pacific Section Meeting, San Francisco, California