1. Introduction -- 2. Water quality management in connected catchmentshallow lake systems -- 3. Integrating tools for surface water quality management -- 4. Framework of the developed water quality management information system (for drainage : shallow lake catchment) -- 5. Description of the study area and data inventory -- 6. Water and nutrients mass balance of catchment : lake system -- 7. Development of hydrodynamic, water quality and eutrophication models -- 8. Application of remote sensing for adjustment and calibration of water quality model -- 9. Application of the developed (WQMIS) as a decision support tool for lake management -- 10. Conclusions and recommendations.