What is ungauged catchment?

An ungauged catchment is a river basin or watershed where no direct measurements of streamflow or hydrological data are available. This lack of data can complicate water resource management, flood forecasting, and environmental assessments. Techniques such as hydrological modeling, remote sensing, and regionalization of data from gauged catchments are often employed to estimate hydrological characteristics in these areas. Understanding ungauged catchments is crucial for sustainable water management and ecosystem conservation.