The International Association of Hydrological Sciences (IAHS) was one of six associations to convene symposia and workshops during the General Assembly of the International Union of Geodesy and Geophysics in Boulder, Colo., from July 2–14, 1995
Scale issues were a common theme in many of the meetings and were discussed in symposia on the effects of scale on interpretation and management of sediment and water quality, models for assessing and monitoring groundwater quality, and tracer technologies for hydrological systems, and a workshop on hydrology and water resources in developing economies in light of global change. In the symposium on tracer technologies for hydrological systems, the attendees concluded that tracer methods have not been fully exploited. In the symposium on modeling and management of sustainable basin-scale water resource systems, there was a strong interest in sustainability on the part of the hydrological community. In the workshop on hydrology and global change the attendees perceived an urgent need to use mesoscale models to scale down global circulation model output for use in planning large river basin management practices in developing countries. The organizers of a workshop on remote sensing algorithms in hydrology tried an informal, hands-on approach, generating lively discussions and high attendance over 3 days.