Water at the Confluence of Science, Law and Public Policy, a symposium sponsored by the Tucson Chapter of the Arizona Hydrological Society, convenes Sept. 23-26 at the Holiday Inn-City Center in Tucson, Ariz. The event includes field trips and discussions on topics including water quality, mining and NAFTA. For details, contact Suzanne Kirk, Dames & Moore, 7500 N. Dreamy Draw Dr., Suite 145, Phoenix, AZ 85020 (602/861-7452).