The study used a Soil Conservation Service (SCS) model to predict how rainfall affects runoff in the Wangdonggou small watershed. By analyzing land use, soil, hydrology, and weather data, the researchers divided the area into sections based on how water naturally flows. They found that the SCS model accurately predicted runoff, with a precision of over 75%. This model successfully simulated the process of water turning into runoff in a typical watershed on the loess plateau. The researchers showed that using geographical and remote sensing data with the SCS model could help understand how rainfall impacts runoff in this specific region.