This publication provides introductory technical guidance for civil engineers, environmental engineers and other professional engineers and water resources professionals interested in techniques for assessment of water quality in reservoirs. Here is what is discussed: 1. SCOPE 2. GENERAL 3. INFORMATION SEARCH 4. PROJECT CHARACTERISTICS AND CALCULATIONS 5. SITE-SPECIFIC WATER QUALITY DATA 6. STUDY OBJECTIVES 7. FIELD INVESTIGATIONS 8. LABORATORY STUDIES 9. STATISTICAL TECHNIQUES 10. WATER QUALITY INDICES 11. REMOTE SENSING 12. PREDICTIVE TECHNIQUES - GENERAL 13. REGRESSION ANALYSIS 14. COMPARATIVE ANALYSIS 15. MODELING 16. NUTRIENT LOADING MODELS 17. NUMERICAL SIMULATION MODELS 18. PHYSICAL MODELS.