The scientists studied how water runoff can be predicted using a computer system called GIS to help manage pollution in rivers and lakes. They used a model called N-SPECT along with maps showing the land and weather information to estimate runoff in a specific area named Karha basin. The results showed that the predicted runoff volume was 207.22 billion cubic meters, which is close to 70% of the observed runoff measured at a station in Barahanpur. This information is helpful for understanding and planning water management to prevent pollution and erosion in the area.