- Working Groups
- ICCE, Continental Erosion
- ICCLAS, Coupled Land-Atmosphere Systems
- ICGW, Groundwater
- ICRS, Remote Sensing
- ICSH, Statistical Hydrology
- ICSIH, Snow and Ice Hydrology
- ICSW, Surface Water
- ICT, Tracers
- ICWQ, Water Quality
- ICWRS, Water Resources Systems