Introductory technical guidance for civil engineers and other professional engineers, planners and construction managers interested in techniques to evaluate the hydroelectric power potential of sites. Here is what is discussed: 1. INTRODUCTION 2. TYPES OF HYDROELECTRIC ENERGY 3. THE WATER POWER EQUATION 4. GENERAL APPROACHES TO ESTIMATING ENERGY 5. TURBINE CHARACTERISTICS AND SELECTION 6. DATA REQUIREMENTS 7. FLOW-DURATION METHOD 8. SEQUENTIAL STREAMFLOW ROUTING (SSR) METHOD 9. APPLICATION OF SSR TO PROJECTS WITHOUT POWER STORAGE 10. APPLICATION OF SSR TO PROJECTS WITH POWER STORAGE 11. POWER RULE CURVES 12. MULTIPLE-PURPOSE STORAGE OPERATION 13. ALTERNATIVE POWER OPERATION STRATEGIES 14. SYSTEM ANALYSIS 15. HYBRID METHOD.