PUB Working Group 1 (WG1): Top-Down Modelling Working Group
Objectives
The TDWG works primarily within PUB Themes 1 and 3 to address components of PUB Target 1
- Examine and improve existing models in terms of their ability to predict in ungauged basins through appropriate measures of predictive uncertainty
- Advance new approaches to learning from existing data: data mining and re-analysis, basin inter- comparisons and global hydrology
- Advance learning from the application of existing models, through uncertainty analyses and model diagnostics
- Interact with other Target 1 issues (and Target 2 issues), where appropriate
Key areas of interest are
- Scientific aspects of the conversion of systematic and field research measurement to information useful for catchment management
- The need to reduce uncertainty in variables estimated for catchment management
Important hydrological science for the TDWG includes:
- Model structure
- Model calibration techniques and methodologies
- Parameter identifiability issues
- Statistical techniques
- Assimilation from field process studies, new measurement techniques, and computer software
The TDWG examines the use of top-down modelling as a tool for prediction in ungauged basins. This includes surface water and groundwater hydrology, as well as water quality issues (eg sediment, nutrient, and contaminant source, transport, and deposition). There will be three foci for this working group:
- Evaluation of existing models with a view to developing better models
- Exploration of data to develop new modelling approaches
- Development of new models
More information is available on the Group's website at tdwg.catchment.org
Key Participants: