Explore the dynamics of running water in this 50-minute lecture covering the hydrologic cycle, river systems, and their impact on Earth's landscape. Delve into the intricacies of drainage patterns, stream velocity, and channel changes from source to mouth. Examine erosional and depositional processes, including the formation of deltas, natural levees, and alluvial fans. Investigate stream channel types, focusing on braided streams and their characteristics. Learn about the shaping of stream valleys, base levels, and the development of floodplains. Analyze the impact of floods, including flash floods, and discuss flood control engineering efforts. Gain insights into freshwater resources and water management through references to USGS and EPA resources.