This publication provides introductory technical guidance for civil engineers and other professional engineers interested in hydraulic analysis of rivers. Here is what is discussed: 1. INTRODUCTION 2. LIMITATIONS OF ONE-DIMENSIONAL ANALYSIS 3. EQUATIONS OF FLOW 4. SIGNIFICANCE OF TERMS 5. USE OF EQUATIONS OF FLOW 6. TWO-DIMENSIONAL FLOW CONDITIONS 7. AVAILABLE COMPUTER PROGRAMS 8. DATA REQUIREMENTS 9. DATA DEVELOPMENT AND MODEL CALIBRATION 10. EXAMPLE APPLICATIONS