NEXT MEETING: CRYSTAL CITY, VIRGINIA - AUG 1-5 2022

This talk will offer some of my thoughts regarding the current needs, challenges and opportunities in water quality monitoring, modelling and management. Many needs are highlighted by major pollution events that continue to persist and have not yet been successfully managed.  Opportunities mostly focus on improving model applicability or ease of implementation.  Challenges seem in most cases to be related to insufficient data for model calibration and validation. This in turn reflects on the challenges of maintaining long term monitoring and knowing what to monitor even before such data are deemed needed. Data useful for developing and validating large scale water quality models are often only sparsely available if at all.  This applies in particular for emerging pollutants (e.g. plastics, chemicals, drugs), and especially in most developing countries.  Monitoring and modelling water quality at the global scale is important to identify and predict robust hot spot regions of severe water quality degradation, to better understand future (global) changes in response to management actions, and to quantify indicators and linkages among SDGs.  For many pollutants, and especially at large scales, water quality modelling is still in its infancy.  This talk will suggest some topics and priorities for further research that would enable meaningful water quality assessments and policies needed for water quality management and decision making.