Hydrometeorological anomalies and impacts on the infrastructure of Huánuco: analysis of the first quarter, 2025
Keywords:
hydrometeorological anomalies, flow, SPI index, climatic variability, risk managementAbstract
during the first quarter of 2025 and their impact on the infrastructure of Huánuco. Daily precipitation series (2015–2025) and flow series (2020–2025) from SENAMHI and ANA were used, applying the Standardized Precipitation Index (SPI) and the Z-score method to detect anomalies. The results show an atypical hydrological behavior characterized by significant positive anomalies in flow, with values exceeding 2.5 standard deviations in March 2025, while precipitation exhibited high interseasonal variability, with intense events mainly concentrated in February. The hydrological stations Higueras, San Rafael, and Taruca recorded flow increases of up to 80% compared to their historical averages. This decoupling between accumulated precipitation and the hydrological response suggests the influence of factors such as prior soil saturation, accumulated runoff, and contributions from the upper zones. These conditions generated overflows, mudslides, and floods that affected road infrastructure, housing, and agricultural areas in Huánuco, Ambo, and Santa María del Valle. It is concluded that the 2025 event responds to a non-stationary hydrological regime, which highlights the need to update hydraulic design criteria and incorporate risk management packages based on the changing climatic conditions of the Huánuco region. This research constitutes a fundamental technical basis for disaster risk management in the region.
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Copyright (c) 2026 Klinsman Aguirre-Quispe, Nilton Díaz-Quispe, Angélica de la Cruz-Guillén, Viviana Villaran-Rojas, Jorge Romero-Estacio (Autor/a)
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