This chapter examines runoff sensitivity to changes in specific land-use and land-cover (LULC) types, namely forest, agriculture, and urban areas. Using ANCOVA applied to SWAT-derived hydrologic response units, the analysis isolates the effect of individual LULC classes on runoff while controlling for rainfall variability. The results indicate that variations in forest area significantly influence runoff once a threshold size of approximately 1.32 km2 is exceeded, highlighting the dominant role of forest cover in regulating basin hydrology. Agricultural land size also exerts a statistically significant control on runoff, with notable changes occurring beyond a threshold of about 1.30 km2, reflecting the predominance of cropland within the basin. In contrast, changes in urban built-up area do not show a significant impact on runoff, which is attributed to its limited and spatially scattered extent. The findings demonstrate the existence of critical LULC thresholds and clarify how individual land-use and land-cover classes differentially regulate basin runoff, providing valuable insights for land-use planning and water resource management.