Foreword Chapter 1 River of Happiness: Definition and Connotation Chapter 2 River Happiness Index (RHI) and Its Evaluation Criteria Chapter 3 Evaluation Scope of the World's Rivers Chapter 4 Findings 4.1 Amazon River 4.2 Colorado River 4.3 Congo River 4.4 Danube River 4.5 Euphrates River 4.6 Ganges Rivet 4.7 Mississippi River 4.8 Murray-Darling River 4.9 Nile River 4.10 Rhine River 4.11 St. Lawrence River 4.12 Thames River 4.13 Volga River 4.14 Yangtze River 4.15 Yellow River Chapter 5 Comparative Analysis 5.1 Scores and Grades of Happiness of World's Rivers 5.2 Capacity of Life and Property Safety Protection (CSP) 5.3 Reliability of Water Resources (RWR) 5.4 Livability of Water Environment (LWE) 5.5 Health of Aquatic Ecosystem (HAE) 5.6 Prosperity of Water Culture (PWC) Appendix: Sources of Information