1. Space techniques to measure hydrological surface variables

1.1 Global land hydrology and its geodynamic effects (gravimetry)
1.2 New generation Radar altimetry SAR and Interferometry processing
1.3 Laser altimetry processing
1.4 Spaceborne Imagers (Optical and Radar)
1.5 Retrieval methods for other applications of space observations in large river basins (e.g., sediments transport, systematic mapping of wet areas, flood monitoring, use of altimetry for vertical referencing) Space Techniques to derive Digital Elevation Models for Hydrology from Global to Regional Scales         
1.6 Blending/Fusion of large and diverse datasets

2. Monitoring Spatio-temporal changes of surface waters from space:

2.1 applications to climate research (Long-term data records for climate)
2.2 applications to water resources management.

3. Modelling and Assimilation:

3.1 Global and regional hydrological modelling: objectives, state of the art, improvement and data requirements (accuracy and space-time resolution). Expected potential of space and ground data in hydraulic and hydrodynamic modelling: parameterisation, assimilation, validation and forecast (river discharge, lake water balance, basin-scale water cycle)   

4. Requirements from the Inland Water Hydrology Community:

4.1 From Large-scale hydrology to Small-scale hydrology: Do hydrology requirements depend on
scale? How space techniques can answer these challenges? Downscaling? Precision vs. resolution?


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