River gauges are instruments used to measure the water level in rivers and streams. They help monitor changes in water height, which can indicate flooding or drought conditions. By providing real-time data, river gauges are essential for managing water resources and ensuring public safety. These gauges can be found in various locations, often installed by government agencies like the U.S. Geological Survey or local environmental organizations. The information collected is used by scientists, engineers, and emergency responders to make informed decisions regarding water management and disaster preparedness.