Image Tool USGS | Estimating Low-Flow Frequency Statistics and Hydrologic Analysis of Selected Streamflow-Gaging Stations Low-flow frequency statistics were computed at streamflow-gaging stations and measurement sites in the study region. Details Hazards Changing Seasons Extreme Heat Shifting Species, Habitats, and Ecosystems Water Quality Assets Agriculture and Food Supply Aquatic and Marine Resources Water Infrastructure – General Take me to the tool