Spatiotemporal evolution of curve number (CN) and its variations in the Ichu River Basin (2017-2023)@en

This dataset presents the spatiotemporal evolution of the Curve Number (CN) in the experimental Ichu River basin, located in the central Peruvian Andes, from 2017 to 2023. CN maps were generated by integrating satellite data (Sentinel-2) and soil models (SoilGrid), applying the GPCN10 methodology for automated CN value assignment. Additionally, annual comparative analyses highlight variations in the basin's hydrological response, linked to both land-use changes and climate variability. The dataset includes graphical comparisons of CN differences between consecutive years (e.g., 2017 vs. 2018), revealing areas with significant changes in soil infiltration capacity. Furthermore, change class maps identify regions undergoing land degradation (due to urbanization or deforestation) and areas showing improvements in water retention, associated with conservation practices such as reforestation. These data provide a foundation for assessing the impact of land-use changes on surface runoff and contribute to sustainable water resource management strategies in the region. […]