The researchers studied the Bagmati River Basin in Nepal to better understand water availability. They used a model to simulate runoff, a key aspect of water flow. By analyzing data from 1997 to 2004, they found that the model accurately predicted runoff levels, with a high correlation to actual measurements. The model showed that surface runoff accounted for 40-43% of precipitation, while water yield and evapotranspiration made up 71% and 23% respectively. This study demonstrates the importance of accurate hydrological modeling for managing water resources in Nepal's River Basins.