In view of the emerging large-scale environmental problems whose solutions will require a deep understanding of the global water cycle, the International Association of Hydrological Sciences (IAHS) is planning a number of new activities. For instance, a substantial contribution from hydrologists is necessary for the Global Energy and Water Cycle Experiment (GEWEX), which is planned for the mid-1990s. This project is under the Joint Science Committee (JSC) of the International Council of Scientific Unions (ICSU) and the World Climate Research Program. A special IAHS-World Meteorological Organization (WMO) working group for GEWEX has been formed to
- turn the attention of hydrologists to the much-neglected large-scale hydrologic problems;
- foster international collaboration of hydrology with its closest geophysical sister disciplines, i.e., atmospheric and ocean sciences; and
- emphasize the potential of the newly developed observation technologies, which so far have been applied in hydrological science only on a very limited scale.