A joint U.S.-Australian workshop on acid groundwater systems was held March 7–11, 1989, at the University of Hawaii in Honolulu. Funding was provided by the International Division of the National Science Foundation and the Australian Department of Industry, Technology, and Commerce, and 11 U.S. and 6 Australian geoscientists attended.

Lake Tyrell, located in southeast Australia, is a focus for groundwater discharge within the Murray Basin. The lake and surrounding region has attracted considerable interest following the pioneering work of Macumber [1983], who recognized the importance of complex hydrological and geochemical processes there. The interest from several researchers culminated in a joint program among U.S. and Australian scientists from five institutions initiated in early 1987. This meeting was a n extension of the cooperative U.S./Australian research program at Lake Tyrell.