Interflow, a key water source for rivers, was studied along the Kaoping River in Taiwan. By using a model that combines surface and groundwater flow, researchers identified high interflow potential zones in elevated areas. The study found that interflow rates are higher in high elevation regions compared to coastal zones, with average rates of 3.5 × 104 (m3/d) and 2.0 × 104 (m3/d) respectively. Rainfall variability impacts interflow rates, especially during wet seasons, while interflow remains stable in dry seasons. This research highlights the importance of interflow as a reliable water resource in the study area.