Significant advances have been made in the monitoring, analysis and prediction of the behaviour of riverine systems resulting in a better understanding of their mechanism and the possibility of optimising these resources as well as being able to control or mitigate the effects of major disasters. These developments have been the result of better surveying and measuring techniques, as well as the use of increasingly accurate computer codes. They are also fruit of better communication between practitioners and academics, through their interaction in joint research projects and regular meetings, including international conferences. This book contains papers presented at the 6th International Conference on River Basin Management, held in Riverside, California, representing the state of the art in this important topic. They include many aspects of hydrology, ecology, environmental management, flood plains and wetlands. The contributions in this volume are classified under the following sections: River and watershed management; Flood studies; Hydrological modelling; River restoration and environmental impact; Erosion and sediment transport; Water resources management and water quality.